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4 years ago

Solve the system by substitution. y = 4x + 3 y = 72

Mathematics

1 answer:

Sever21 [200]4 years ago

4 0

Answer:

17.25

Step-by-step explanation:

You already know y = 72, so you could rewrite the equation to 72 = 4x + 3. To get to the answer, you need to find what X is. What you should do is subtract 3 from both sides, get 69, divide by 4 on both sides and get 17.25

I'm not sure if this is correct, but I hope this helped.

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Exponential growth: $\mathbf{y = 5(7)^x}$ , $\mathbf{y = 3(4.2)^x}$ and $\mathbf{y = 0.6(1.3)^x}$
Exponential decay: $\mathbf{k = 4.2(0.28)^x}$
Neither: $\mathbf{h(x) - 3x + 1.3}$

An exponential equation is said to represent growth, if the rate is greater than 1, while it represents decay if the rate is less than 1.

This means that:

$\mathbf{y = 5(7)^x}$ , $\mathbf{y = 3(4.2)^x}$ and $\mathbf{y = 0.6(1.3)^x}$ represent exponential growth because 5, 4.2 and 1.3 are greater than 1

Also,

$\mathbf{k = 4.2(0.28)^x}$ represents exponential decay because 0.28 is less than 1

While

$\mathbf{h(x) - 3x + 1.3}$ is not an exponential function

Read more about exponential functions at:

brainly.com/question/11487261

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