The answer is r have a good day
Answer:

Step-by-step explanation:
Given

Required
Determine the inverse function b(a)
Write A(b) as a

Swap a and b


Divide both sides by 7

Maka a the subject

Swap a and b again

Hence:

Answer: -9%
Step-by-step explanation:
Answer:
$687.42
Step-by-step explanation:
The total with tax is ...
(price) + (tax rate)×(price)
= price(1 +tax rate)
= $643.95×1.0675 ≈ $687.42 . . . price with tax
Answer:
50 degrees
Step-by-step explanation:
If angle A and angle B are complementary, that would mean that their sum is 90 degrees. A + B = 90 . We know that angle A is 40, so 40 + B = 90. It becomes a one step equation. Subtract both sides by 40. 90 - 40 = 50. Angle B is equal to 50 degrees.