Answer:176.6cm2
Step-by-step explanation:
Pi*r^2
diameter is 15
divide by 2 is radius
Answer: I got 1.625
Step-by-step explanation: 13 divided by 4 is 3.25 then divided by 2 is 1.625
Answer:
16
Step-by-step explanation:
Perfect square in the quadratic from ax² + bx + c
You know an equation is perfect when:
2√(ax²)√(c) = bx
Substitute x² for ax² and 8x for bx. Then isolate c by doing the reverse operations.
2√(ax²)√(c) = bx
2√(x²)√(c) = 8x
2x√c = 8x Divide both sides by 2x
√c = 4 Square both sides to isolate c.
c = 16
The missing constant term is 16.
Check answer:
x² - 8x + 16
(x - 4)²
= (x - 4)(x - 4)
= x² - 4x - 4x + 16
= x² - 8x + 16
Answer:
Step-by-step explanation:
1. Set 3x + 20 and 5x - 50 equal to each other
3x + 20 = 5x - 50
3x = 5x - 70
-2x = -70
x = 34
2. Once you've solved for x plug that in to 3x + 20 or 5x + 50
3(35)+ 20
105 + 20
125
3. After plugging in the x take that answer and subtract from 180 which will give you y
180 - 125 = y
55 = y
