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2 years ago

F(x)=3x-7 find the value of c so that f(c) =20 is true

Mathematics

2 answers:

Andreas93 [3]2 years ago

7 0

Answer:

c = 9

Explanation:

given: f(x)=3x-7

if f(c) =20

To solve this replace x with c and then y is 20.

Solve:

3c - 7 = 20

3c = 27

c = 27 ÷ 3

c = 9

Harman [31]2 years ago

3 0

Answer: C = 9

Step-by-step explanation:

hope this helps

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3 years ago

I need help with #39-42, please explain.

shusha [124]

For question 39 & 40, we need to use the below equation to complete the sentence

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Question 39:

When ' n ' increase, the $\sqrt{n}$ will also increase and that multiplied with constant ' m ', the l will also increase.

Solution for question 39:

As $n$ increases and $m$ stays constant , $l$ increases

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Question 40:

Solving the equation for m, we get

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Question 41:

When $s$ is triped, the equation will be...

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Solution for question 41:

If $s$ is tripled and $t$ stays constant, $r$ is multiplied by 9

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Question 42:

When t is doubled, the equation will be...

$r=s^2/(2t)^2=\frac{s^2}{2^2 \cdot t^2}=\frac{s^2}{4t^2}\\ \\ r=0.25s^2/t^2 \; \; (or) \; \; \frac{1}{4} \cdot \frac{s^2}{t^2}$

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3 years ago

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OlgaM077 [116]

Answer:

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Step-by-step explanation:

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