On a family outing, Tyler bought 5 cups of hot cocoa and 4 pretzels for
$18.40. Some of his family members would like a second serving, so he
went back to the same food stand and bought another 2 cups of hot cocoa
and 4 pretzels for $11.20.
Here is a system of equations that represent the quantities and constraints
in this situation.
5c + 4p = 18.40
2c + 4p - 11.20

If we add the second equation to the first equation, we have a new equation: 7c + 8p = 29.60
Explain why the same (c, p) pair that is a solution to this new equation.

Answers

Answer 1

9514 1404 393

Answer:

  the properties of equality tell you so

Step-by-step explanation:

A couple of properties of equality come into play here:

the addition property of equalitythe substitution property of equality

Each of the properties of equality tells you an operation you can perform on an equation without changing the values of the variables that satisfy that equation.

If we start with the equation ...

  5c + 4p = 18.40

and we add 11.20 to both sides, we have not changed the values of the variables that satisfy this equation. This is the addition property of equality.

  (5c +4p) +11.20 = (18.40) +11.20

The substitution property of equality says I can substitute anything for its equal. The second given equation tells me that 2c +4p = 11.20. This means I can use 2c+4p wherever 11.20 might be found without changing any variable values. In the equation we got from addition, we can now make this substitution, and we have ...

  (5c +4p) +(2c +4p) = (18.40) +(11.20)

  7c +8p = 29.60 . . . . . . . collect terms

We obtained this equation using properties of equality that guarantee solutions to these equations are not altered by the process.

_____

*Additional comment

Technically, by doing the "collect terms" step, we have made the assumption that the values of c and p that satisfy the first equation are the same as the values of c and p that satisfy the second equation. This is usually the case we're interested in.


Related Questions

Please help me asap this was due 5 days ago

Please help me asap this was due 5 days ago

Answers

Answer:

do 9.60 divided by 12

Step-by-step explanation:

Answer:

$0.80

Step-by-step explanation:

All that is needed for finding this answer is 9.60 ÷ 12 which gets us 0.80.

Complete the equation involving x. Order terms like the physical situation, and don't simplify.

A 5 foot wide painting should be centered on a 15 foot wide wall. Type the left side of an equation that can be used to determine how many feet (x) should be on each side of the painting.

Answers

Therefore, the painting should be placed 5/4 feet on each side of the wall.

In the given problem, a 5-foot wide painting should be centered on a 15-foot wide wall. We can determine the length of each side of the painting by subtracting x from each side of the wall.

Therefore, the left side of the equation can be written as:

\(15 - x - 5 - x\)

The physical situation given is that the painting is to be centered on the wall. This means that each side of the wall will have the same amount of space as the painting.

Therefore, the length of each side of the painting can be determined by subtracting x from each side of the wall. The total width of the wall is 15 feet, and the painting is 5 feet wide.

Therefore, the total length of the space on each side of the painting is 5 + x.To find the value of x, we can equate the length of each side of the painting. Therefore, the equation can be written as:

\(15 -x - 5 - x = 5 + x + x\)

Simplifying the equation, we get:

\(10 - 2x = 2x + 5\)

Solving for x, we get:

\(4x = 5x = \frac{5}{4}\)

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David bought a camera for $250. This price included a sales tax of 15%. Calculate the tax that was paid?​

Answers

Step-by-step explanation:

Let 'p'  be the price before tax , then  .15 p is the tax added

p   +   .15 p  = 250

1.15 p = 250

p = 250/1.15 = 217.39

      then tax is .15 p = $ 32.61

Determine the center and radius of each circle.
(x – 6)2 + y2 – 8y = 0

Answers

Answer:

Step-by-step explanation:

(x-6)² + y²-8y = 0

Put the equation into center-radius form.

complete the square

 coefficient of the y term:  -8

 divide it in half: -4

 square it: (-4)² = 4²

 add 4² to both sides to complete the square and keep the equation balanced:

(x-6)² + (y²-8y+4²) = 4²

(x-6)² + ( y-4)² = 4²

center (6,4)

radius 4

Which of the following sets of data does not contain an outlier?
A.16, 17, 20, 19.48
B.59. 60. 61, 67.65
C.95.99.97.94.60
D.-1.2.1.0.5.16

Answers

Answer:

it is a letter b

Step-by-step explanation:

that does not contain an outlet

Find each missing measure

PLS HURRY WILL GIVE BRANLIEST. DON'T RESPOND WITH LINKS

Find each missing measurePLS HURRY WILL GIVE BRANLIEST. DON'T RESPOND WITH LINKS

Answers

Answer: 1 = 90 2=58 3=90 6=58 7=8

Step-by-step explanation:

I don’t know what 4 and 5 are

Find the length of side X in simple radical form with a rational denominator

Answers

The length of side X in simple radical form with a rational denominator is 10/√3.

What is a 30-60-90 triangle?

In Mathematics and Geometry, a 30-60-90 triangle is also referred to as a special right-angled triangle and it can be defined as a type of right-angled triangle whose angles are in the ratio 1:2:3 and the side lengths are in the ratio 1:√3:2.

This ultimately implies that, the length of the hypotenuse of a 30-60-90 triangle is double (twice) the length of the shorter leg (adjacent side), and the length of the longer leg (opposite side) of a 30-60-90 triangle is √3 times the length of the shorter leg (adjacent side):

Adjacent side = 5/√3

Hypotenuse, x = 2 × 5/√3

Hypotenuse, x = 10/√3.

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Missing information:

The question is incomplete and the complete question is shown in the attached picture.

Find the length of side X in simple radical form with a rational denominator

The circumference of a circle is 8​ pi
kilometers. What is the diameter?

Answers

Answer:

Using the formulas

C=2πr

d=2r

Solving for d

d=C

π=8

π≈2.54648

d≈2.55

Hi, can you help me to solve this exercise please!

Hi, can you help me to solve this exercise please!

Answers

So we have a 60° arc defined in a 12cm radius circle. The length of an arc in a circle is equal to the product of the angle that defines it (in radians) and the radius. So the first thing we have to do is convert 60° to radians and then multiply the result by 12cm. In order to convert an angle alpha from degrees to radians we have to use the following formula:

\(\alpha\cdot\frac{2\pi}{360}\)

So taking alpha equal to 60 we get:

\(60\cdot\frac{2\pi}{360}=\frac{60}{360}\cdot2\pi=\frac{1}{6}\cdot2\pi=\frac{2}{6}\pi=\frac{\pi}{3}\)

So the 60° angle in radians is equal to π/3. Then the length of the arc is given by:

\(\frac{\pi}{3}\cdot12\operatorname{cm}=4\pi\operatorname{cm}=12.6\operatorname{cm}\)

So the first answer is 12.6 cm.

For the second question we need to find the area of the sector defined by the arc. For an arc defined by an angle alpha in a circle with radius r the area of the sector given by the arc is equal to:

\(A=\frac{\alpha}{360}\cdot\pi r^2\)

Where alpha must be written in degrees. Here alpha is equal to 60° so we get:

\(\begin{gathered} A=\frac{60}{360}\cdot\pi\cdot(12\operatorname{cm})^2=\pi\cdot\frac{144\operatorname{cm}}{6} \\ A=\pi\cdot24\operatorname{cm}=75.4\operatorname{cm} \end{gathered}\)

Then the second answer is 75.4 cm².

Determine the domain of the function F(x) =2-x/12x^2+8x

Answers

The given function is F(x) = (2-x)/(12x^2+8x)

The domain of a function is the set of all possible values of x for which the function is defined. In this case, the function is defined for all values of x except those that make the denominator equal to zero, since division by zero is undefined.

So, to find the domain of the function, we need to find the values of x that make the denominator equal to zero and exclude them from the domain.

12x^2+8x = 0
4x(3x + 2) = 0
x = 0 or x = -2/3

Therefore, the domain of the function F(x) is all real numbers except 0 and -2/3. In interval notation, we can write the domain as:

(-∞, -2/3) U (-2/3, 0) U (0, ∞)

expand and simplify (x+5)(x-1)

Answers

The expanded and simplified form of the expression (x + 5)(x - 1) is  x² - x + 5x - 5.

What is the expanded form of the expression?

Given the expression in the question;

(x + 5)(x - 1)

To expand and simplify the expression (x+5)(x-1),

we use the distributive property:

(x + 5)(x - 1)

x(x - 1) + 5(x - 1)

Now we can simplify each term by using the distributive property again:

x(x - 1) = x² - x

5(x - 1) = 5x - 5

Putting these terms back together, we have:

(x+5)(x-1) = x² - x + 5x - 5

Combining like terms, we get:

(x+5)(x-1) = x² + 4x - 5

Therefore, (x+5)(x-1) simplifies to the quadratic expression x² + 4x - 5.

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25 POINTS PICTURE INCLUDED PLEASE ANSWER I NEED HELP
What expression represents the value of v?

25 POINTS PICTURE INCLUDED PLEASE ANSWER I NEED HELPWhat expression represents the value of v?

Answers

Answer:

that is an obtuse angle and mixed with an aacute, you answer should be 45 or 50 degrees please correct me if im wrong.

Step-by-step explanation:

Gianna is going to throw a ball from the top floor of her middle school. When she throws the ball from 48feet above the ground, the function h(t)=-16t^2+32t +48 models the height,h, of the ball above the ground as a function of time, t. Find the zero of this function that tells us when the ball will hit the ground.

Answers

To find when the ball will hit the ground, we need to find the value of t when h(t) = 0 since the height above the earth will be zero when the ball hits the ground.

Substitute h(t) = 0 in the given equation:

-16t^2 + 32t + 48 = 0

Dividing both sides by -16:

t^2 - 2t - 3 = 0

Factorizing the equation:

(t - 3)(t + 1) = 0

So, the solutions are t = 3 or t = -1.

Since time can't be negative, the only solution that makes sense in this context is t = 3.

Therefore, the ball will hit the ground after 3 seconds.

The 20th term from the end of the AP, 3, 8 , 13,. ..... ,253 is​

Answers

Given A.P = 3,8,13,...,253

Common difference = 8-3 = 5

The AP from the end = 253, 248,245,...,13,8,3

First term from the end = 253

Common difference = 248-253 = -5

We know that

an = a+(n-1)d

t20 = 253+(20-1)(-5)

→ t 20 = 253 +(19)(-5)

→ t 20 = 253-95

→ t 20 = 158

20th term from the end of the AP = 158

this is confusing to me can you help me

this is confusing to me can you help me

Answers

Area of figure 1 is 468 cm² and figure 2 is 45 cm².

What is Area?

Area is the entire amount of space occupied by a flat (2-D) surface or an object's form. On a sheet of paper, draw a square using a pencil. It has two dimensions. The area of a form on paper is the area that it occupies.

In these given figure for calculating the area of them we need to divide them into two or more shape like rectangle, triangle or square. For example, I will take Figure 1 and 2

For figure 1

Length of base = 16 + 14 =  30 cm

Length of right rectangle whose side is 14 and 14(smaller one)

Thus, its area = 14 * 14 = 196

Area of left rectangle whose side is 16 and 17 = 16 * 17 = 272

Total area of the figure = 272 + 196 = 468 square cm

For figure 2

If we split them into two shape they will become a square and a triangle

Area of triangle = 1/2 base * height = 1/2 * 6 *3 = 9

Area of square = side * side = 6*6 = 36

Thus, total area = 9 + 36 = 45 square cm

Therefore, Area of these given figures(in unit square) are:

4684549693.75192170.59600203456

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Find X,so that 7x+1,5x+7,and 2x-1 form an arithmetic sequence and write the first three terms.​

Answers

The first three terms of the arithmetic sequence are -97, -63, and -29.

The value of x = -14.

How to Find the Terms in an Arithmetic Sequence?

To find the value of x and the first three terms of the arithmetic sequence, we can equate the differences between consecutive terms:

The common difference (d) is the same between all consecutive terms.

So, we have:

(5x + 7) - (7x + 1) = (2x - 1) - (5x + 7)

Simplifying the equation:

5x + 7 - 7x - 1 = 2x - 1 - 5x - 7

-2x + 6 = -3x - 8

Now, let's solve for X:

-2x + 3x = -8 - 6

x = -14

Substituting the value of X back into the expressions, we can find the first three terms:

First term: 7x + 1 = 7(-14) + 1 = -97

Second term: 5x + 7 = 5(-14) + 7 = -63

Third term: 2x - 1 = 2(-14) - 1 = -29

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Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?

Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections

Answers

Answer: 5 inspections in 4 hours, because if its 8 hours it would be 10 inspections

Step-by-step explanation:

Answer:

1.25

Step-by-step explanation:

10 ÷ 8 = 1.25

How many inches are in 50 centimeters?​

Answers

19.69 inches is in 50 centimeters

Is
7 3

a proper, an improper, a mixed number, or a decimal fraction?
a proper fraction
an improper fraction
a mixed number
a decimal number

Answers

Answer: an improper fraction

Step-by-step explanation:  An improper fraction is a fraction that is larger than 1 7/3 is larger than one because 7, the numerator is larger than the denominator so 7/3 is an improper fraction

40 is what percent of 320

Answers

the answer is 12.5% pretty sure

Convert the binary number 1101001 to decimal.

Answers

Answer:

105

Step-by-step explanation:

Answer:

105

Step-by-step explanation:

Decimal calculation steps
(1101001)₂ = (1 × 2⁶) + (1 × 2⁵) + (0 × 2⁴) + (1 × 2³) + (0 × 2²) + (0 × 2¹) + (1 × 2⁰) = (105)₁₀

Solve the equation for X.
X
12
4

Answers

Answer:

x=16

Step-by-step explanation:

Which problem can be solved by performing this multiplication?


3/4×8/9


Responses


Evan practiced piano this week for 3/4 hour. Last week he practice for8/9 hour. How much longer did Evan practice last week than this week?



Jada rode her bike 3/4 mile. Sarah rode her bike 8/9 the distance that Jada rode her bike. How far did Sarah ride her bike?


Amelie drove 3/4 mile. She then drove another 8/9 mile. How many miles did she drive in all?



Three out of 4 containers hold lemonade. Each container holds 8/9 quart of lemonade. How much lemonade do the containers all hold?

Answers

The multiplication 3/4×8/9 can be used to address the problem in response (B). which is the correct answer that would be an option (B).

What is the Multiplication operation?

In mathematics, Multiplication operations perform Multiplying values on either side of the operator.

For example 4×2 = 8

As per option (B),

Jada rode her bike for 3/4 mile. Sarah rode her bike 8/9 the distance that Jada rode her bike.

Sarah rides her bike = Sarah rode (8/9) of the (3/4) that Jada rode.

Sarah rides her bike = 3/4 × 8/9

Therefore, this problem can be solved by performing the above multiplication.

Hence, the correct answer would be an option (B).

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Jayne uses long division to convert a rational number
to a decimal. Which of the following statements cannot be true?
00:00
The decimal form of terminates in zeros.
00:00
The decimal form of eventually repeats.
00:00
The decimal form of is a whole number.
The decimal form of
never repeats or terminates

Answers

Answer:

Answer: The decimal form of a/b never repeats or terminates.

Step-by-step explanation:

Fractions such as " a/b " can be ratios so they don't terminate.

(3,-2) and (-4, 5). Find the slope

Answers

Answer:

-1

Step-by-step explanation:

We can use the formula to find slope

(y2-y1) / (x2-x1)

y1 is the first Y coordinate in the first pair

y2 is the second one in the first pair

X1 is the first X coordinate in the frst pair

x2 is the second one In the second pair.

so if we put it together it’d look liek this

(5- (-) 2) / (-4 - 3)

5+2 / -4 + -3

7/-7

or -1

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer: -1

Explanation:

y2-y1/x2-x1

Then you plug the points into the equation

I hope this helped!

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98 x 24 = (100 - 2 ) x 24 = ?

Answers

Answer:

2352

Step-by-step explanation:

(100 - 2) x 24 = 2400 - 48 = 2352

3 Jack walk from Santa Clara to Polo Allo. Il took I hour 25 min to walk from Santa Clot to Los Altos. Than it took 25 minute of wal from los altos to Palo buto. He arrived in Palo alto at 2:45 P.M. of what time die Santa Clara ? he leave Santa clara​

Answers

The time Jack left Santa Clara is 1 : 55 pm

What is word problem?

A word problem in math is a math question written as one sentence or more. These statements are interpreted into mathematical equation or expression.

The time for Jack to walk to lose Altos is 25 min and he uses another 25mins to work to Palo alto.

Therefore, the total time he spent is

25mins + 25 mins = 50 mins

He arrived Palo at 2 :45 pm, therefore the time he left Santa Clare will be ;

2:45 pm = 14 :45

= 14:45 - 50mins

= 13:55

= 1 : 55pm

Therefore he left at 1:55 pm

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What is the cos A?Will give 15 points.

What is the cos A?Will give 15 points.

Answers

Answer:

Step-by-step explanation:

cos A = \(\frac{\sqrt{8} }{3}\)

9
Select the correct answer.
Which statement is true about this equation?
-9(x + 3) + 12 = -3(2x + 5) - 3x
OA
The equation has one solution, x= 1.
OB. The equation has one solution, x = 0.
OC. The equation has no solution.
OD
The equation has infinitely many solutions.
Reset
Next

Answers

Answer: D. The equation has infinitely many solutions.

Step-by-step explanation:

Given equation: \(-9(x + 3) + 12 = -3(2x + 5) - 3x\)

\(\Rightarrow -9(x)+(-9)(3)+12=(-3)(2x)+(-3)(5)-3x\\\\\Rightarrow\ -9x-27+12=-6x-15-3x\\\\\Rightarrow\ -9x-15=-9x-15\\\\\Rightarrow\ -9x+9x=-15+15\\\\\Rightarrow\ 0=0\)

which is true.

This happens when all numbers are solutions.

i.e. The equation has infinitely many solutions.

Correct option : D.

What's this? I don't understand

What's this? I don't understand

Answers

Answer:

There are two solutions

Step-by-step explanation:

The two equations intersect in two points therefore you willl have two solutions

Answer:

C. two solutions

Step-by-step explanation:

Hope this helped have an amazing day!

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