Answer:
The function input is -20 when the output is 25
Step-by-step explanation:
we have

where
y is the dependent variable or output
x is the independent variable or input
If the output is 25
then
y=25
substitute

Solve for the function input is the same that solve for x
Isolate the variable x
Adds 5x both sides


subtract 25 both sides


Divide by 5 both sides

therefore
The function input is -20 when the output is 25
40°
Step-by-step explanation:
∠ACB = ∠DCE ( vertically opposite angle )
Now...
a + 90° + 50° = 180° ( the sum of interior angle of triangle is 180° )
a + 140° = 180°
a = 180° - 140°
a = 40°
hence the value of a is 40°
Answer:
38449
Step-by-step explanation:
29,035 + 3,028 + 4,562 + 2,846 = 39471
29471 - 1022 = 38449