3 years ago

That is good the 1,2,3 and 8?? i need the 4 and 5

Mathematics

2 answers:

Alla [95]3 years ago

6 0

C for 4, b for 5. I need 20 characters

marysya [2.9K]3 years ago

5 0

C for number 4 and for 5 it's C

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Please help me figure out this problem

tiny-mole [99]

Answer:

$f(g(x))=f\left(-\dfrac{3x+21}{5}\right)=x\\\\g(f(x))=g\left(-\dfrac{5}{3}x-7\right)=x$

Step-by-step explanation:

Fill in the given expressions and simplify.

$f(g(x))=f\left(-\dfrac{3x+21}{5}\right)=-\dfrac{5}{3}\left(-\dfrac{3x+21}{5}\right)-7\\\\=\left(-\dfrac{5}{3}\right)\left(-\dfrac{3x}{5}\right)-\left(\dfrac{5}{3}\right)\left(-\dfrac{21}{5}\right)-7\\\\=\dfrac{15x}{15}+\dfrac{5\cdot 21}{3\cdot 5}-7=x+7-7=x$

Going the other way, we have ...

$g(f(x))=\displaystyle -\frac{3\left(-\frac{5}{3}x-7\right)+21}{5}=-\frac{-5x-21+21}{5}=x$

5 0

3 years ago

When solving a system of equations, you are finding the ________.

nasty-shy [4]

The correct answer is intersection point

When you find the solution, you actually find where the two lines cross on the coordinate system. It is the single point that works in all equations.

3 0

3 years ago

Is this function linear , quadratic, or exponential?

ElenaW [278]

Answer:

LINEAR

Step-by-step explanation:

Look at the y-values. As x increases, y increases each time by 9 units.

This indicates an arithmetic progression. The function is LINEAR.

7 0

3 years ago

20 times 70 equals? Please help, explain this to me.