please help me with this i beg u​

Answer:

the 2nd one is the answer

Answer:

the second one is the answer is correct

Answer:

60%

Step-by-step explanation:

12/20 = 3/5 = 0.6 = 60%

Hey there! To find out how much of her homework Jewel completed, all we need to do is a little math. First, let's divide the number of questions she did by the total number of questions. That's 12 divided by 20 which equals 0.6.

Now, we just need to turn that decimal into a percentage. To do that, we simply multiply 0.6 by 100, which gives us 60. And voila! Jewel completed 60% of her homework.

Using the quadratic formula we can see that the correct option is the first one:

x = −5.54 and x = 0.54

Here we want to solve the quadratic equation:

2x² + 10x - 6 = 0

To solve it, we need to use the quadratic formula, the solutions for x will be:

\(x = \frac{-10 \pm \sqrt{10^2 - 4*2*-6} }{2*2} \\\\x = \frac{-10 \pm 12.2}{4}\)

then the two solutions of the quadratic equations are:

x = (-10 + 12.2)/4 = 0.55

x = (-10 - 12.2)/4 = -5.55

Then the correct option (by approximation) is the first one, where the difference in the last digit is due to rounding.

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Answer:

The rates are not equivalent since Maria saves $0.50 more per month than Ralph.

Step-by-step explanation:

We can determine if two rates are equivalent by comparing the rates at which they save per month.

Maria's savings per month:

Both 50 and 4 can be divided by 2, which gives us 25/2.  As a regular number, this becomes 12.5/1 which means Maria saves $12.5 per month.

Ralph's savings per month:

Both 60 and 5 can be divided by 5, which gives us 12.  Thus, Ralph saves $12 per month.

Thus, the rates are not equivalent as Maria saves $0.50 more per month than Ralph.

Approximately 99.7% of scores lie in the shaded region.

We have,

The empirical rule, also known as the 68-95-99.7 rule, provides an estimate of the percentage of scores that lie within a certain number of standard deviations from the mean in a normal distribution.

According to this rule:

Approximately 68% of scores lie within 1 standard deviation of the mean.

Approximately 95% of scores lie within 2 standard deviations of the mean.

Approximately 99.7% of scores lie within 3 standard deviations of the mean.

Now,

In the given scenario, the shaded region represents the area between -2 and 3 standard deviations from the mean on the x-axis.

This encompasses the area within 3 standard deviations of the mean.

And,

Since 99.7% of scores lie within 3 standard deviations of the mean, we can estimate that approximately 99.7% of scores lie in the shaded region.

Therefore,

Approximately 99.7% of scores lie in the shaded region.

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Answer:

-2x^2  - 43x - 343 - 2393/x-7

The answers are :

1. The equation of line parallel to y =  \(\frac{2}{5}\) x - 3 will be y =  \(\frac{2}{5}\) x - \(\frac{7}{5}\) .

2. The equation of line perpendicular to y = - \(\frac{2}{5}\) x - 4 will be y =  \(\frac{5}{2}\) x + \(\frac{13}{2}\) .

What is the slope intercept form of a line ?

The equation of line that can be written as y = mx + c, where m is the slope and c is the line's y-intercept, is known as a slope intercept form.

1.

It is given that equation is : y = 2/5x - 3.

So , the slope here is 2/5 and a parallel line will have the same slope.

We know that the slope intercept form of a line is :

y = mx + c

Put , slope(m) = 2/5 in above equation.

Given , (1,-1) i.e., x = 1 and y = -1

Now we substitute these values to find value of c.

-1 = 2/5(1) + c

-1 = 2/5 + c

-1 - 2/5 = c

(-5 - 2)/5 = c

-7/5 = c

Putting m = 2/5 and c = -7/5 , we get :

So, the equation of parallel line is :

y =  \(\frac{2}{5}\) x - \(\frac{7}{5}\)

2.

We know that the product of the slope of two perpendicular lines is -1.

Given that equation is : y = -2/5x - 4 i.e., slope = -2/5

So , slope of a line perpendicular to this line is -1/(-2/5) = 5/2

And this line passes through the point (-3,1).

Equation of a line that passes through a point (x1 , y1) and slope (m) is :

(y-y1) = m (x-x1)

Here ;

x1 = -3 , y1 = 1 and m = 5/2

So , the equation of perpendicular line will be :

(y - 1) = \(\frac{5}{2}\) (x - (-3))

(y - 1) =  \(\frac{5}{2}\) (x + 3)

y - 1 =  \(\frac{5}{2}\) x + \(\frac{15}{2}\)

y =  \(\frac{5}{2}\) x + \(\frac{15}{2}\) + 1

y =  \(\frac{5}{2}\) x + \(\frac{13}{2}\)

Therefore , the answers are :

1. The equation of line parallel to y =  \(\frac{2}{5}\) x - 3 will be y =  \(\frac{2}{5}\) x - \(\frac{7}{5}\) .

2. The equation of line perpendicular to y = - \(\frac{2}{5}\) x - 4 will be y =  \(\frac{5}{2}\) x + \(\frac{13}{2}\) .

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Answer:

36/5

Step-by-step explanation:

Did it in my head, hopefully its correct

SOLUTION:

Case: Number of deaths

Method:

First, we add the total number of deaths

Next, we subtract from the total number of people alive

If there were 244,000 48-year olds,

The scale factor will be:

Hence the number of people expected NOT to be alive is:

Final answer:

8519 people approximately

Given the expression:

First we need to get rid of the parenthesis by multiplying 11 by 3 and by y:

Now we solve for y:

Therefore, y=3

Answer:

245

Step-by-step explanation:

if you're rounding to the nearest 100, 245 would be the only one that would round to 200. if it were 250 or above, it would round to 300, so 245 is the only one that would round to 200 because 245 is less than 250

Answer:

It would be D.x = -2/3 or x =2

Answer:

B

Step-by-step explanation:

(3x-2) - 5 = -1

⇒(3x-2)-4=0

⇒3x-6=0

⇒3x=6

⇒x=6/3

⇒x=2

Answer:

5.17

Step-by-step explanation:

the depreciation expense for 2022 is $4,968. By solving with New annual depreciation expense = (Book value - Revised salvage value) / Revised useful life

How to determine the depreciation expense?

To determine the depreciation expense for 2022, we need to first calculate the book value of the equipment as of January 1, 2022.

Book value as of January 1, 2022 = Cost of equipment - Accumulated depreciation

Accumulated depreciation as of December 31, 2021 = (Cost of equipment - Salvage value) / Useful life x Number of years depreciated

Accumulated depreciation as of December 31, 2021 = ($77,100 - $5,370) / 10 x 4 = $25,956

Book value as of January 1, 2022 = $77,100 - $25,956 = $51,144

Next, we need to determine the new annual depreciation expense based on the revised estimated salvage value and useful life.

New annual depreciation expense = (Book value - Revised salvage value) / Revised useful life

New annual depreciation expense = ($51,144 - $7,420) / 9 = $4,968

Therefore, the depreciation expense for 2022 is $4,968.

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The amount cheaper is the car washes Malcolm orders than the car washes Martha's order is $13.

The correct answer choice is option B.

Malcolm's gift card = $50.

Cost Malcolm's car wash per visit = $7

Martha's gift card = $180

Cost Martha's car wash per visit = Difference between gift card balance of first and second visit

= $180 - $160

= $20

How cheap is the car washes Malcolm orders than the car washes Martha's order = $20 - $7

= $13

Therefore, Malcolm's car wash is cheaper than Martha's car wash by $13

The complete question is attached in the diagram.

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Answer:

option 1 i believe

Step-by-step explanation:

just worked it out

i hope this is right and helps <3

The function that best models this scenario is C of x equals 3.75 times x if x is less than 5 and 3.25x plus 5 if x is greater than 6.

Let the number of hours be illustrated as x. In this situation, local city park rents kayaks for $3.75 per hour. This will be:

= 3.75 × x

= 3.75x

Also, customer rents for four or more hours, the cost is only $3.25 per hour, plus a $5 processing fee. This will be illustrated as:

= 5 + (3.25 × x)

= 5 + 3.25x

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Answer:

90°

Step-by-step explanation:

sum of angle in triangle =180

Angle X +Angle Y +Angle Z =180

45 + 45 + Angle Z =180

Angle Z =180-(45+45)

Angle Z = 90°

Answer:

Half maybe?

sorry it would have been easier if it told us how much exactly

Answer:

3.75 hours

Step-by-step explanation:

d = rt

where d is the distance, r is the rate and t is the time

45 = 12 t

Divide each side by 12

45/12 = t

3.75 hours = t

Answer:

Step-by-step explanation:

            Given                  Parallel lines                     Converse

a. ∠13 ≅ ∠17                          a║c                  Corresponding angles

b. ∠4 ≅ ∠9                            d║e                  Exterior alternate angles

c. m∠20 + m∠21 = 180°        a║b                  Consecutive interior angles

d. ∠8 ≅ ∠19                                                    Vertical angles

e. ∠10 ≅ ∠23                         b║c                  Interior alternate angles

f.  m∠14 + m∠17 = 180°          a║c                  Consecutive interior angles

From the given diagram and information, it can be concluded that lines a, b, and c are parallel, and lines d and e are parallel.

The given lines in the diagram are a, b, c, d, and e.

a. It is given that the measure of angle 13 is equal to that of angle 17.

Now, these two angles are made by lines a, c, and d. Now, the angles are corresponding and equal, and hence, lines a and c will be parallel.

b. It is given that the measure of angle 4 is equal to that of angle 9.

These two angles are made by lines d, e, and b. Now, the angles are alternate exterior and equal, and hence, lines d and e will be parallel.

c. It is given that the sum of the measure of angles 20 and 21 is equal to 180 degrees.

These two angles are made by lines a, b, and e. Now, the angles are supplementary and their sum is 180 degrees, and hence, lines a and b will be parallel.

d. It is given that the measure of angle 8 is equal to that of angle 19.

These two angles are vertically opposite angles between lines a and e.

e. It is given that the measure of angle 10 is equal to that of angle 23.

These two angles are made by lines b, c, and e. Now, the angles are alternate interior and equal, and hence, lines b and c will be parallel.

f. It is given that the sum of the measure of angles 14 and 17 is equal to 180 degrees.

These two angles are made by lines a, c, and d. Now, the angles are supplementary and their sum is 180 degrees, and hence, lines a and c will be parallel.

Therefore, it can be concluded that lines a, b, and c are parallel, and the lines d and e are parallel.

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Answer:

Step-by-step explanation:

In the Intermediate Phase of mathematics education, one topic that demonstrates a hierarchical and logical progression in patterns, functions, and algebra is the concept of "Linear Equations."

The topic of Linear Equations in the Intermediate Phase builds upon the foundation laid in earlier grades and serves as a stepping stone towards more advanced algebraic concepts. Here is an overview of the topic sequence and content area spread for Linear Equations:

Introduction to Variables and Expressions:

Students are introduced to the concept of variables and expressions, learning to represent unknown quantities using letters or symbols. They understand the difference between constants and variables and learn to evaluate expressions.

Solving One-Step Equations:

Students learn how to solve simple one-step equations involving addition, subtraction, multiplication, and division. They develop the skills to isolate the variable and find its value.

Solving Two-Step Equations:

Building upon the previous knowledge, students progress to solving two-step equations. They learn to perform multiple operations to isolate the variable and find its value.

Writing and Graphing Linear Equations:

Students explore the relationship between variables and learn to write linear equations in slope-intercept form (y = mx + b). They understand the meaning of slope and y-intercept and how they relate to the graph of a line.

Systems of Linear Equations:

Students are introduced to the concept of systems of linear equations, where multiple equations are solved simultaneously. They learn various methods such as substitution, elimination, and graphing to find the solution to the system.

Word Problems and Applications:

Students apply their understanding of linear equations to solve real-life word problems and situations. They learn to translate verbal descriptions into algebraic equations and solve them to find the unknown quantities.

The content area spread for Linear Equations includes concepts such as variables, expressions, equations, operations, graphing, slope, y-intercept, systems, and real-world applications. The progression from simple one-step equations to more complex systems of equations reflects a logical sequence that builds upon prior knowledge and skills.

By following this hierarchical progression, students develop a solid foundation in algebraic thinking and problem-solving skills. They learn to apply mathematical concepts and procedures in a systematic and logical manner, paving the way for further exploration of patterns, functions, and advanced algebraic topics in later phases of mathematics education.

We can say that after answering the offered question For instance, if equation fixing a plumbing problem takes an hour, the cost would be $75. If the repair takes two hours, it will cost $125, and so on.

An equation is a mathematical statement that proves the equality of two expressions connected by an equal sign '='. For instance, 2x – 5 = 13. Expressions include 2x-5 and 13. '=' is the character that links the two expressions. A mathematical formula that has two algebraic expressions on either side of an equal sign (=) is known as an equation. It depicts the equivalency relationship between the left and right formulas. L.H.S. = R.H.S. (left side = right side) in any formula.

{(1, 75), (2, 125), (3, 175), (4, 225), (5, 275)}

The cost to repair a plumbing issue based on the number of hours is represented by these sets of ordered pairs. For instance, if fixing a plumbing problem takes an hour, the cost would be $75. If the repair takes two hours, it will cost $125, and so on.

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y = 2x^2 + 3x + 3 has 0 x intercepts

y = 3x^2 + 3x + 4 has 0 x intercepts

Answer: 13

Step-by-step explanation:

4x+3y=-5 solve x :    

4x = -3y + -5           | -3y

1x = -0.75y + -1.25  | : 4

-3x + 7y = 13 solve x :

-3x + 7y = 13              | -7y

-3x = -7y = 13             | : (-3)

Equalization Method Solution: -0.75y+-1.25=2.333y+-4.333

-0, 75y - 1,25 = 2,333y - 4, 333 solve y:

-0, 75y - 1,25 = 2,333y -4, 333    | -2,333y

-3, 083y - 1,25 = -4,333               | + 1, 25

-3. 083y = -3,088                         | : (-3, 083)

y = 1

Plug y = 1 into the equation 4x + 3y = -5 :

4x + 3 · 1           | Multiply 3 with 1

4x + 3 = -5        | -3

4x = -8              | : 4

x = -2

So the solution is:

y = 1, x = -2

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Given:

Equation is

Required:

Solve equation for x.

Explanation:

We will use here

Now,

Answer:

Hence, the value of x = 3.