A) Solve y=f(x) for x.
This instruction just means to manipulate the equation so that x is all by itself on one side. We can use a mixture of addition/subtraction and multiplication/division to do this with any equation.
f(x)=-3x+7
y=-3x+7
y-7=-3x
(y-7)/-3=x
b) Find the input to f(x) when the output is -8.
This means that it wants us to find the x value that provides a y value of -8. To solve this, we just need to plug -8 in for y and solve for x.
y=-3x+7
-8=-3x+7
-15=-3x
x=5
I would say base times height! ^^~ and if I’m wrong I’m so sorry and if you could please tell me the right answer. <3
Answer:
x > −3
Step-by-step explanation:
Let's solve your inequality step-by-step.
3(x + 2) > x
Step 1: Simplify both sides of the inequality.
3x + 6 > x
Step 2: Subtract x from both sides.
3x + 6 − x > x − x
2x + 6 > 0
Step 3: Subtract 6 from both sides.
2x + 6 − 6 > 0 − 6
2x > −6
Step 4: Divide both sides by 2.
2x / 2 > −6 / 2
x > −3
Answer:
x > −3
Hope this helps :)