Step-by-step explanation:
(f.g)(x) = (9x²-2x-9)(11x-9)
= 99x³-81x²-22x²+18x -99x +81
= 99x³ -103x²-81x +81
optionB
Answer:
A. 3.15c + 0.82f
Step-by-step explanation:
c pounds of cashews for $3.15 = 3.15c
f pounds of flour for $0.82 = 0.82f
then, the expression can be used to determine the total cost is:
A. 3.15c + 0.82f
This is how I'd set it up:
405/20 = 243/x
this means the mpg (miles / gallons) for 1 situation is the same as the mpg for the other situation (because the rate is the same)
then just cross multiply and solve:
405x=243*20 or 405x=4860 or x = 12
he would need 12 gallons of gas for 243 miles
Answer:
9
Step-by-step explanation:
When plugging 6 in for y, you get
2x + 3(6) = 36
You have to multiply 3 and 6, getting
2x + 18 = 36.
Now, you subtract 18 from both sides to isolate the x variable, getting
2x = 18
Now, you divide 2 from both sides because we want x standing by itself, getting
x = 9
Therefore, your answer is 9.
Hope this helped
ps accepting brainliest ;)