Answer:
My age is 78 years.
Explanation:
Define my age first as a variable.
Let my age be
x
years.
Reduced by means subtracted.
Subtract twice my age from 400 to get 244:
400
−
2
x
=
244
400
−
244
=
2
x
←
make x positive and isolate it.
156
=
2
x
78
=
x
Step-by-step explanation:
The x values are the domain and they y values are the range. So the domain is {-2, 0, 2}. And the range is {-1, 0, 1}. So B is the answer.
The problem tells you that a circle with radius 21 inches is painted in two colors. The two colors cover equal areas, so each color is half the area of the circle. You need to find half of the area of the circle. To do that, use the formula for the area of a circle, and then divide by 2.



Half the circle has area 1384.74 square inches / 2 = 692.37 square inches.
Answer: Each color covers 692.37 square inches.
Answer:
Step-by-step explanation:
= x - 5 ( x ≥ 3 )
(
)² = ( x - 5 )²
x - 3 = x² - 10x + 25
x² - 11x + 28 = 0
(x - 4)(x - 7) = 0
= 7
= 4
Check the answer:
1). x = 7
= 7 - 2
√4 = 2
2 = 2
2). x = 4
= 4 - 5
1 = - 1 (False statement) ⇒ x = 4 is an extraneous solution.
Answer: I predict 460.
Step-by-step explanation: