10x - 8y = 4
-5x + 3y = -9
(please explain step by step I don't understand)​

Answer:

22b - 15

Step-by-step explanation:

add the dependent variable together

Answer: 23b- 15

Explation:

Answer:

Option F

Step-by-step explanation:

F). x + y = 3 -------(1)

    x - 3y = -2 --------(2)

    Equation (1) minus equation (2)

    (x + y) - (x - 3y) = 3 - (-2)

    4y = 5

    y = 1.25

    Hence, y is positive.

G). x + y = 3 --------(1)

    x + y = -2 --------(2)

    Both the equations represent parallel lines.

    There are no solutions of the given equations.

H). x - 3y = -2 -------(1)

     x + y = -2 -------(2)

    Equation (2) minus equation (1)

    (x + y) - (x - 3y) = -2 - (-2)

     4y = 0

     y = 0

    Since, 0 is neither positive nor negative, y will be neither positive nor negative.

J). x + y = 3 -------(1)

    x - y = 3 --------(2)

    Equation (1) - Equation (2)

    (x + y) - (x - y) = 3 - 3

    2y = 0

    Hence, y is neither negative nor positive.  

    Therefore, Option F is the answer.

Igor has not been skiing in 10 years. however, when he gets on his skis, his body remembers exactly how to ski. the kind of memory that makes it possible for him to remember how to ski is procedural.

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\(0.5(2x+8) = x-4\\\\\implies \dfrac 12 (2x+8 ) = x-4\\\\\implies 2x+8 = 2x-8\\\\\implies 8=-8\\\\\text{Which is not true, so there are no solution.}\)

Answer:

the answer is B

Step-by-step explanation:

Answer:

70 miles

Step-by-step explanation:

Divide 42 by 0.60 = 70

Multiply 70 * 0.60 = 42.

Answer:

(-4)3/(-4)-12

-12/48

-1/4

Step-by-step explanation:

PEMDAS

do multiplication then division

Allysa will need 2 cubic feet of clay to create a square pyramid with a base that is 2 feet wide and a 1.5-foot height.

A pyramid's volume can be calculated using the formula V = (1/3) Bh, where "B" stands for the base area and "h" for the height of the pyramid. We can use the formulas for the area of polygons to calculate "B" because we know that any polygon can serve as a pyramid's base.

Length of the base = 2 feet

width of the base = 2 feet

Height of the pyramid = 1.5 feer

volume of the pyramid = length * width * height/3

                                      =  2 * 2* 1.5 /3

                                      = 4 *0.5

the volume of the pyramid  = 2 cubic feet

Allysa will need 2 cubic feet of clay to create a square pyramid with a base that is 2 feet wide and a 1.5-foot height.

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Answer:

151.18

Step-by-step explanation:

I can't really show my work on this, sorry.

Answer:

151.18

Step-by-step explanation:

210.58-59.40=151.18

Answer:

356.82

Step-by-step explanation:

Answer:

I may be wrong but I  believe it could be (−∞, ∞).

Step-by-step explanation:

Depending on the polynomial is what the rage would be. I'm beyond sorry if it is wrong.

The volume of prism is 75.6 \(in^3\). The correct answer is option d,

We are given that the rectangle represents the base of a right rectangular prism and the height of the prism is 6 inches. To find the volume of the prism, we need to multiply the area of the rectangle by the height.

The area of the rectangle can be found by multiplying its length and width. However, we are not given any specific values for the length and width of the rectangle. Therefore, we cannot directly calculate its area.

Since we are given answer choices, we can use them to check which option gives the correct volume of the prism. We can start by assuming that the length, width, and height of the prism are integers, and then calculate the volume for each option until we find the one that matches.

Option a: 87.9 in^3 - This is not an integer, so we can eliminate this option.

Option b: 105.8 in^3 - This is not an integer, so we can eliminate this option.

Option c: 12.6 in^3 - This is too small, so we can eliminate this option.

Option d: 75.6 in^3 - To check if this is the correct answer, we can calculate the area of the rectangle by dividing the volume by the height.

Volume of the prism = area of rectangle x height

75.6 in^3 = (length x width) x 6 in

Length x width = 12.6 in^2

Now, we need to find two integers whose product is 12.6 in^2 and whose sum is 16 in (since the rectangle represents the base of a right rectangular prism). After some trial and error, we find that 3.15 in and 4 in satisfy these conditions.

Therefore, the length of the rectangle is 4 inches and the width is 3.15 inches.

Now, we can calculate the area of the rectangle by multiplying its length and width:

Area of rectangle = length x width = 4 in x 3.15 in = 12.6 in^2

Finally, we can calculate the volume of the prism:

Volume of prism = area of rectangle x height = 12.6 in^2 x 6 in = 75.6 in^3

Therefore, the correct answer is option d, 75.6 \(in^3\).

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Answer: 12 units

Step-by-step explanation:

If you graph them on a graph you count the units between them and that is your anwser.

Answer:

12 units

Step-by-step explanation:

calculate DG using the distance formula

d = \(\sqrt{(x_{2}-x_{1})^2+(y_{2 -y_{1} } )^2\)

with (x₁, y₁ ) = D (8, 3 ) and (x₂, y₂ ) = G (- 4, 3 )

DG = \(\sqrt{(-4-8)^2+(3-3))^2}\)

     = \(\sqrt{(-12)^2+0^2}\)

     = \(\sqrt{144+0}\)

    = \(\sqrt{144}\)

    = 12

Answer:

-4x + 12

Step-by-step explanation:

2(x+6)-6x

2x + 12 - 6x

combine llike terms

2x - 6x = -4x

-4x + 12

Answer:

2(x+6)-6x=-4x+12

Step-by-step explanation:

So how I got that was I expanded 2(x+6): 2x+12 so I got 2x+12-6x

I simplified 2x+12-6x and I got -4x+12

Answer:

Rebecca is 12

Jennifer is 16

Step-by-step explanation:

28 - 4 = 24

24 : 2 = 12

12 + 4 = 16 (Jennifer)

28 - 16 = 12 (Rebecca)

Answer:

C. y=1/2x+3

Step-by-step explanation:

3 is the positive y-intercept

1 is the rise and 2 is the run

Answer:

?

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

|2x-10|=22

2x-10=22         2x-10= -22

2x=23                2x= -12

 16                             -6

Answer:

A then B then 1/2 then yes

Step-by-step explanation:

Answer:

D - 4.6

Step-by-step explanation:

Hope it Helps!

:)

and sorry for the late answer

Answer:

the answer is -6 1/8

Step-by-step explanation:

The length of hole digging for hours is 6.125 feet.

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.

Given that;

Rate of digging hole by Robert =  \(1\frac{ 3}{4}\) feet every hour

Find the Length of hole digging for \(3 \frac{1}{2}\)  hours

Computation:

Rate of digging hole by Robert

Time taken =  \(1\frac{ 3}{4}\)  hours = 7/4 hours

The Length of hole digging for hours = Rate of digging hole × Time taken

Length of hole digging for hours = (7/4)(7/2)

Length of hole digging for  hours = 49/8

Length of hole digging for hours = 6.125 feet (Approx.)

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Answer:

A

Step-by-step explanation:

(A) would be correct.

A^x would yield (0.9^60)^x when plugged in. Since an exponent

on the parenthesis surrounding a number with an exponent already

just gets multiplied to the number's exponent, we'd end up with

      0.9^60*x , which is the same as the given example.

The radius of circle is 20 cm so that cirlcle have same surface area as that of sphere.

The surface area of a sphere with radius r is given by:

4 * π * \(r^2\)

The surface area of a circle with radius R is given by:

π * \(R^2\)

We are given that the surface area of a sphere with radius 10 cm is equal to the surface area of a circle. Setting the two expressions for surface area equal to each other and solving for R gives:

4 * π * \(r^2\) =  π * \(R^2\)

=> 4 \(r^2\) =  \(R^2\)

=> R =2r

as given that r = 10cm

so R = 20 cm

Thus, the radius of the circle is 20 cm.

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Answer:

-57

Step-by-step explanation:

If he had an 8 ft board and cut 65 ft off it would be -57.

Answer: n = 0 and -2

Step-by-step explanation:

Equate the expressions to zero

n(n+2) = 0

n = 0 and n+2 = 0

n = 0 and n = -2

Answer:

5/13

Step-by-step explanation:

f(x) = \(\frac{3x^{2}-7 }{4x^{2}-3 }\)

Substitute x for 2.

\(\frac{3(2)^2-7}{4(2)^2-3}\)

Solve

\(\frac{3(4)-7}{4(4)-3}\)

\(\frac{12-7}{16-3}\)

f(2)= \(\frac{5}{13}\)

The value of f(2) is 5/29.

In mathematics, a function is represented as a rule that produces a distinct result for each input x. In mathematics, a function is indicated by a mapping or transformation. Typically, these functions are identified by letters like f, g, and h. The collection of all the values that the function may input while it is defined is known as the domain. The entire set of values that the function's output can produce is referred to as the range. The set of values that could be a function's outputs is known as the co-domain.

Given:

f(x) = 3x² -7/ 4x² - 3

Now, find the value of the function at x= 2

So, f(2)= 3(2)² -7/ 4(2)² - 3

f(2) = 3 x 4 -7 / 4 x 8  - 3

f(2) = 5/29

Hence, the value of f(2) is 5/29.

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Answer:

x=11

Step-by-step explanation:

5x+62=3x+47+37

5x+62=3x+84

2x=22

x=11

The study has a confounding variable since the two groups differ in the time they were supposed to report to the testing room. Since the groups differed in terms of sleep deprivation and the time they were supposed to report to the testing room, the effect of sleep deprivation on learning could not be isolated.

The statement that is true is: d. All of these are true.Explanation:A study may have various sources of variability, including participant selection, the setting in which the study is conducted, and the measure used. The following options are as follows:a. The study may be affected by a situational variable.b. The construction noise may contribute to variability in test scores.c. The study has a confounding variable. The groups differ in the time they are to report to the testing room.d. All of these are true.Therefore, all of these options are true. For example, the study may be affected by a situational variable if a natural disaster or other unforeseen event happens that causes the study to be disrupted. In this case, the study was disrupted by a noisy construction crew, which may have contributed to variability in test scores. The study has a confounding variable since the two groups differ in the time they were supposed to report to the testing room. Since the groups differed in terms of sleep deprivation and the time they were supposed to report to the testing room, the effect of sleep deprivation on learning could not be isolated.

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\((\frac{-3}{5}, \frac{-4}{5} ) and (\frac{-8^\frac{1}{2} }{3} ,\frac{1}{3})\) are the missing coordinates(P) in the Quadrant iii and quadrant ii of the unit circle

What is quadrant and its type?

A quadrant is an area or section of a cartesian plane that results from the intersection of two axes. It is used to establish a point's location in a plane. Look at the illustration below, which depicts a cartesian plane with two axes dividing it into four quadrants.

The graph plane is divided into four quadrants by the X and Y axes:

So now we know that the equation of the unit circle is x^2+y^2=r^2

now the Point (P) will be:-

\((-3/5)^2+(y)^2=1\\\\y^2=1-9/25\\\\y=-4/5\)

because the quadrant is iii

\((x)^2+(1/3)^2=1\\\\x^2=1-1/9\\\\y=-8^\frac{1}{2} /3\)

because the quadrant is ii

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