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3 years ago

Rewrite each expression by combining like terms. b. 19x + 5y - 8x PLEASE

Mathematics

1 answer:

morpeh [17]3 years ago

8 0

Answer:

11x+5y

read my comment for additional help!

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What is the x-coordinate of the solution of the system? x+y+3 4x-y=-38

steposvetlana [31]

Note: I am assuming the first equation is:

x+y = 3

Answer:

The solution to the system of equations is:

(x, y) = (-2, 36)

Therefore, the x-coordinate of the solution of the system

x = -2

Step-by-step explanation:

Given the system of equations

$\begin{bmatrix}x+y=34\\ x-y=-38\end{bmatrix}$

subtracting the equations

$x-y=-38$

$-$

$\underline{x+y=34}$

$-2y=-72$

solve -2y for y

$-2y=-72$

Divide both sides by -2

$\frac{-2y}{-2}=\frac{-72}{-2}$

$y=36$

For x+y=34 plug in y = 36

$x+36=34$

Subtract 36 from both sides

$x+36-36=34-36$

Simplify

$x=-2$

Thus, the solution to the system of equations is:

(x, y) = (-2, 36)

Therefore, the x-coordinate of the solution of the system

x = -2

6 0

3 years ago

The area of the top face of a cube is 16 square inches. Use 8 of these cubes to make a rectangular

KengaRu [80]

Answer:

The volume of the rectangular prism is 512 inches³

Step-by-step explanation:

Any cube has 6 square faces

Area of any square = L × L, where L is a length of each side

The volume of the cube = L × L × L

∵ The area of the top face of a cube = 16 inches²

→ Find which number multiply by itself = 16

∵ 16 = L × L

∵ 16 = 4 × 4

∴ L = 4 inches

Let us find the volume of 1 cube

∵ The volume of the cube = L × L × L

∵ L = 4 inches

∴ The volume of each cube = 4 × 4 × 4

∴ The volume of each cube = 64 inches³

∵ We will use 8 of this cube to make a rectangular prism

→ That means the volume of the rectangular prism is 8 times

the volume of 1 cube

∴ The volume of the prism = 8 × volume of 1 cube

∵ The volume of each cube = 64 inches³

∴ The volume of the prism = 8 × 64

∴ The volume of the prism = 512 inches³

The volume of the rectangular prism is 512 inches³

5 0

3 years ago

Which equation represents the general from circle w

aev [14]

$d. \: {x}^{2} + {y}^{2} - 4x - 6y - 3 = 0 \\ \\ x = 2 + \infty \sqrt{(y - 7)(y + 1)} 2 - \infty \sqrt{(y - 7)(y + 1)}$

8 0

3 years ago

What is the slope of the line through (-9, 6) and (-6, -9)? A/ ⅕ B/ 5 C/ -5 D/ -⅕

goblinko [34]

Answer:

-5

Step-by-step explanation:

We can find the slope between two points by using

m = (y2-y1)/(x2-x1)

= ( -9-6)/(-6 - -9)

=(-9-6)/( -6+9)

-15/3

-5

8 0

3 years ago

Read 2 more answers

On Monday, Raven ran 2 3 4 miles; Tuesday, 2 3 5 miles; Wednesday, 2 1 2 miles; Thursday, 2 5 8 miles; and Friday, 2 7 10 miles.

mr_godi [17]

Raven ran the farthest on Friday because even though all mixed fractions have the same whole number which is 2, 7/10 is higher than all fractions so 2 7/10 is higher than all which makes it the answer.

3 0

3 years ago

Read 2 more answers