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Margarita [4]
3 years ago
6

Find the value of x for the function y=-2(x+7) if y has a value of 20

Mathematics
2 answers:
Ahat [919]3 years ago
8 0

Answer:

x=-17

Step-by-step explanation:

-2(x+7)=20

distibute the -2

-2x-14=20

add 14 to both sides

-2x=34

divide by -2

x=-17

Wewaii [24]3 years ago
4 0

Answer:

x=3

Step-by-step explanation:

put the value of y=20 in equation

20=2(x+7)

20=2x+14

20-14=2x

6=2x

6/2=x

x=3

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Is −4[3(x−7)] and 6(14−2x) equiviant
Paraphin [41]

Answer:

Yes.

Step-by-step explanation:

Set the equations equal to each other to determine their equality.

-4[3(x - 7)] = 6(14 - 2x)

Distribute the 3 and the 6 into their respective parenthesis.

-4[3x - 21] = 84 - 12x

Distribute the -4 into the brackets.

-12x + 84

Rearrange the equations.

84 - 12x = 84 - 12x

Since the equations come out to be the same thing on both sides so that any value satisfies it, the equations are equivalent.

4 0
3 years ago
19 Kayla's car can hold 15 gallons of gas. She gets 20.5 miles per gallon The tank is full. About how far can Kayla drive if she
Nata [24]

Answer:

D

Step-by-step explanation:

6 0
3 years ago
Simplify the expression. Explain each step:<br> 1. 3.5 + (x + 2.7)<br> 2. (8 x k) x 4
barxatty [35]
In a way, you are adding like terms.
3.5 + 2.7 = 6.2, therefore making the answer 6.2 + x

The brackets can be ignored so you are really just asked 8 x 4 x k. 8 x 4 =32 so you end up with 32k
8 0
3 years ago
What is the distance between -15 and 7
fomenos
22 i think idk sorry if i’m wrong
3 0
3 years ago
Read 2 more answers
At the peak of a roller coaster ride, the rider's watch flew off his wrist. The height h in feet of the watch, t seconds after h
defon

Answer:

3 \: s

Step-by-step explanation:

y =  - 16 {x}^{2}  + 32x + 48 \\ 0 =  \frac{ - 16 {x}^{2} + 32x + 48 }{ - 16}  \\0  =  {x}^{2}   - 2x - 3 \\   0= {x}^{2}  - 3x + x - 3 \\  0= x(x - 3)  + 1(x - 3) \\0  = (x + 1)(x - 3) \\  \\ x + 1 = 0  \\ x =  - 1 \\ x - 3 = 0 \\ x = 3

Hope this helps you.

<em>Can</em><em> </em><em>I</em><em> </em><em>have</em><em> </em><em>the</em><em> </em><em>brainliest</em><em> </em><em>please</em><em>?</em>

6 0
3 years ago
Read 2 more answers
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