Ask question

Ask question

All categories

3 years ago

15

What is the value for y in the following expression y=-2x+8 when x=20

2 answers:

ale4655 [162]3 years ago

5 0

Answer:

<h3>y = -32</h3>

Step-by-step explanation:

$y=-2x+8\\\\x=20$

Substitute ; x =20 in given equation

$y =-2(20 )+8\\\\y = -40+8\\\\y = -32$

vichka [17]3 years ago

4 0

Plug in 20 for x. y=-2(20)+8; y= -32

You might be interested in

Can I get help on this please

ryzh [129]

Answer:

D.

Step-by-step explanation:

<FIL and <AIN are Vertical angles.

Vertical angles are always congruent.

Congruent means the same or equal.

8 0

3 years ago

How do I write 125% in simplest form

Lera25 [3.4K]

Answer:

The answer is 5/4 in fraction form and 1.25 decimal form

7 0

3 years ago

A rectangle has a perimeter of 204 feet. It's length is six feet longer than twice it's width. If L stands for the length of the

Ratling [72]

Answer:

L = 70

W = 32

Step-by-step explanation:

P = 2L + 2W

P 204 feet

W = x

L = 2x + 6

P = 2L + 2W

P = 2*(2x + 6) + 2*x

P = 4x + 12 + 2x

P = 6x + 12

But we know that P = 204 So 6x + 12 = 204

6x + 12 = 204 Subtract 12 from both sides

6x + 12 - 12 = 204 - 12 Collect like terms on the right

6x = 192 Divide by 6

x = 192/6

x = 32

Answer

W = 32

L = 2*W + 6

L = 2*32 + 6

L = 64 + 6

L = 70

7 0

3 years ago

If the area of a square with side x is equal to the area of a triangle with base x, then find the altitude of the triangle.

zhannawk [14.2K]

Answer:

$h= 2x$

Step-by-step explanation:

Given

Square

$Side = x$

Triangle

$Base = x$

$Altitude = h$

Required

Find h, if both shapes have the same area

The area of the square is:

$Area = x * x$

$Area = x^2$

The area of the triangle is:

$Area = \frac{1}{2} * Base*Height$

$Area = \frac{1}{2} * x*h$

Equate both areas

$x^2 = \frac{1}{2} * x*h$

Divide both sides by x

$x = \frac{1}{2} *h$

Multiply both sides by 2

$2*x = \frac{1}{2} *h*2$

$2x = h$

$h= 2x$

3 0

3 years ago

What is the value of 6x-4 when x=-5??

julia-pushkina [17]

Answer:

-34

Step-by-step explanation:

6(-5)-4

-30-4

-34

4 0

4 years ago