Answer:
The correct answer is 8x^2+28x+20.
Step-by-step explanation:
(2x+5)(4x+4)
Multiply the first bracket with each element of second bracket:
=4x(2x+5)+4(2x+5)
=8x^2+20x+8x+20
Now solve the like terms:
=8x^2+28x+20
Thus the correct answer is 8x^2+28x+20....
Answer:
Step-by-step explanation:
15
Answer:
7 miles
Step-by-step explanation:
You are in a 10-mile race. You see a sign telling you that you have three miles left to go. So, subtract 3 miles from 10 miles to find out how many miles you have already ran.
10miles total-3 miles left to go=7 miles already completed
C(x) = 4x³+7x²-14x-6
Step-by-step explanation:
Given that the amount of water used in normal days is given by the equation;
W(x) = 5x³ +9x²-14x +9 -----(i)
The amount of decrease in water used is modeled by the equation;
D(x)= x³+2x² +15--------(ii)
To get the function C(x) that models the water used by the car wash on shorter day you subtract equation (ii) from equation(i)
5x³ +9x²-14x +9
- x³+2x² +15
-------------------------
4x³+7x²-14x-6
Learn More
Subtraction in polynomials : brainly.com/question/2273346
Keywords : equation, modeled,
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