Answer:
x=3 y=4
Step-by-step explanation:
x+y=7; x + 2y =11
step: solve x + y = 7 for x:
x + y+ -y =7 + -y (add -y to both sides)
x = -y + 7
step: substitute -y + 7 for x in x + 2y =11:
x + 2y = 11
-y + 7 + 2y = 11
y + 7 =11(simplify both sides of the equation)
y + 7 + -7 = 11 + -7 (add -7 to both sides)
y = 4
step: substitute 4 for y in x = -y + 7:
x = -y +7
x = -4 + 7
x = 3 (simplify both sides of the equation)
Step-by-step explanation:
g(f(-6)) = g( 4(-6)+3) =g(-21) = -21-2 =-23
Answer:
A) 25
Step-by-step explanation:
I am assuming that you mean: 2x² - 7.
Answer:
$51.84
Step-by-step explanation:
First you neeed to figure out how much 40% of 80 is,
It is 38
Next subtract that from 80 to get the discounted price
To figure out how much is sales tax, Find out what 8% of 48 is it is 3.84
Add the to 48 and you have your answer
