Is this a multiple-choice question? I don't see any variables defined to represent length, width, and area.
Using A = area, l = length, w = width, a formula for area would be A = lw.
Some writers use b = base for the length and h = height for the width, in which case A = bh.
The function is discrete, as the fee is charged based on the hours
Answer:
Step-by-step explanation:
3(-5+2x)=21
-15+6x=21 -5*3 is -15
6x=36
x=6
Answer:
4+(3 times x)= height of balloon. x = seconds
Step-by-step explanation:
I hope this helps you! :D
Answer:
A
Step-by-step explanation:
Use foil to expand it.
y = 4 (x^2 + 7x - 9x - 63) Combine the like terms on the right.
y = 4(x^2 - 2x - 63) Use the distributive property to remove the brackets.
y = 4x^2 - 8x - 4*63 Combine the two multiplied factors on the right.
y = 4x^2 - 8x - 252 4* 63 = 252
The answer is A