Answer:
f(f(x)) = x⁴ + 2x² + 2
Step-by-step explanation:
if f(x) = x² + 1, then f(f(x)) is equal to:
f(x)² + 1
= (x² + 1)² + 1
= x⁴ + 2x² + 1 + 1
= x⁴ + 2x² + 2
Answer:
55
Step-by-step explanation:
add 25 and 30 to get 55
a triangle always equals 180 so
180-55=125
y is a straight line with x which equals 180 so
180-125=55
Answer:the number of hot dogs is 10
Step-by-step explanation:
Let x represent the number of hamburgers.
Let y represent the number of hot dogs.
The ratio of hamburgers to hot dogs is 6 to 5. This means that the ratio of x to y is 6/5
x/y = 6/5
5x = 6y
x = 6y/5
Three times the number of hot dogs is 6 more than twice the number of hamburgers. This means that
3y = 2x + 6 - - - - - - - - -1
Substituting x = 6y/5 into equation 1, it becomes
3y = 2(6y/5) + 6
3y = 12y/5 + 6
Multiplying both sides of the equation by 5, it becomes
15y = 12y + 30
15y - 12y = 30
3y = 30
y = 30/3 = 10
x = 6y/5 = 6×10/5
x = 60/5 = 12
Answer:
a=126
Step-by-step explanation:
Answer:
2.75 or 2 3/4
Step-by-step explanation:
1 + 1 = 2
1/4 + 1/2 = 3/4
1/4 = 1/4
make 1/2 into 2/4
add 1/4 to 2/4
3/4
2 + 3/4 = 2 3/4 or 2.75
