Step-by-step explanation:
<u><em>f(a):</em></u>
So for this you simply plug in "a" as x, and this doesn't really do anything beside replace all values with x, so you just have the equation:
<u><em>2 f(a):</em></u>
So for this one, you want to represent f(a) using the equation it's equal to (5a + 4), and substitute it in for f(a). In doing so, you get the expression:
2*f(a) -> 2(5a + 4) -> 10a + 8
<u><em>f(2a):</em></u>
So this is very similar to the first question, although you will have to do some multiplication. So just plug in 2a as "x" to get the equation:
<u><em>f(a+2):</em></u>
Basically the same process, you plug in (a+2) as "x" and simplify:
<u><em>f(a) + f(2)</em></u>:
This is similar to the second question, and you simply want to replace the f(a) with the equation that represents it (5a + 4) and same thing for f(2) = 5(2) + 4
Answer:
B,
Step-by-step explanation:
y - 7 = 3(x - 5)
y - 7 = 3x - 15
y = 3x - 8
answer is B
<h2><em>
Please mark me brainliest if this helped,(by clicking the little crown on my answer) it helps a lot (^o^) !</em></h2>
3x+7=-15
-7=-7
3x=-22
you cannot get the number only if it has a decimal
Answer:
x = 1/7
Step-by-step explanation:
add the two numbers with the x's and subtract 1 from 2. You'll get 7x = 1. Divide 7 from both sides to get x by itself.