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mrs_skeptik [129]

2 years ago

15

For f(x) = 6x + 20, what is the value of x for which f(x)= -4 ?

1 answer:

Ymorist [56]2 years ago

3 0

Answer:

x = -4

Step-by-step explanation:

Plug in -4 into the function and solve for x:

f(x) = 6x + 20

-4 = 6x + 20

-24 = 6x

-4 = x

So, the answer is x = -4

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klasskru [66]

Answer:

$\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}$

$y=0,\:x=6$

Step-by-step explanation:

Considering the system of the equations

$\begin{bmatrix}2x-7y=12\\ -x+15y=-6\end{bmatrix}$

$\mathrm{Isolate}\:x\:\mathrm{for}\:2x-7y=12$

$2x-7y+7y=12+7y$

$2x=12+7y$

Divide both sides by 2

$\frac{2x}{2}=\frac{12}{2}+\frac{7y}{2}$

$x=\frac{12+7y}{2}$

$\mathrm{Subsititute\:}x=\frac{12+7y}{2}$

$\begin{bmatrix}-\frac{12+7y}{2}+15y=-6\end{bmatrix}$

$-\frac{12+7y}{2}+15y=-6$

$\mathrm{Multiply\:both\:sides\:by\:}2$

$-\frac{12+7y}{2}\cdot \:2+15y\cdot \:2=-6\cdot \:2$

$-\left(12+7y\right)+30y=-12$

$-12+23y=-12$

$-12+23y+12=-12+12$

$23y=0$

$\mathrm{Divide\:both\:sides\:by\:}23$

$\frac{23y}{23}=\frac{0}{23}$

$y=0$

$\mathrm{For\:}x=\frac{12+7y}{2}$

$\mathrm{Subsititute\:}y=0$

$x=\frac{12+7\cdot \:0}{2}$

$x=\frac{12}{2}$

$x=6$

$\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}$

$y=0,\:x=6$

4 0

3 years ago

What is x when 5(2x+1)=10x

Gnoma [55]

Step-by-step explanation:

1.before starting first collect the like terms.

5(2x+1)=10x

the like terms are 10x and 2x

2. 5+1=10x-2x because the 2x us crosing the equality sign

that is

6=8

5 0

2 years ago

You deposit 300 in an account earning 6% interest compounded annually. How much will you have in the account in 20 years?

Allushta [10]

P = 300 $; r = 0.06; t = 20; n = 1

A = P ( 1 + r/n)^n*t

= 300 ( 1 + 0.06) ²⁰

= 300 ( 1.06) ²⁰

= 962.14

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Devin is collecting signatures for a petition to open a new park in her town. She needs to collect at least 1,000 signatures bef

san4es73 [151]

Answer:

B) 8 ≤ p

Step-by-step explanation:

1000 - 380 = 620

620 / 80 = 7.75

Round it up to 8

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The answer is c
$\frac{240}{15 } \\ = 16$

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