Answer:
11
Step-by-step explanation:
All you have to do is plug in a. In this case, a=3.
21/a+4
21/(3)+4
21/3+4
7+4
11
If this helps please mark as brainliest
Step-by-step explanation:
x-y2=13
2×4+4=square root of y+2
4((2)(8)−6)+(8)(3)
=4(16−6)+(8)(3)
=(4)(10)+(8)(3)
=40+(8)(3)
=40+24
=64
Answer: B
Step-by-step explanation:
To solve this problem, we first need to find the inverse of f(x). Then, you would plug in x=8. To find teh inverse, you switch y with x and x with y, then solve for y.
y=2x+5 [switch y with x and x with y]
x=2y+5 [subtract both sides by 5]
x-5=2y [divide both sides by 2]
y=(x-5)/2
Now that we have the inverse function, we plug in x=8 and solve.
y=(8-5)/2 [subtract]
y=3/2
Now, we know that f⁻¹(8)=3/2.