Answer:
Step-by-step explanation:
y = 2x^2 - 4x - 5.......if x = -2
so sub in -2 for x
y = 2(-2^2) - 4(-2) - 5
= 2(4) + 8 - 5
= 8 + 8 - 5
= 11 <==== y is 11
formula for volume = V=PI x r^2 x H so replace letters with known values and work the problem out
215 in.^3 = 3.14 x r^2 x 7.5
215/(7.5x3.14) = r^2/(7.5 x 3.14)
r^2 = (215/7.5x3.14)
r^2 = 9.1295
Now, taking the square root of both sides, we get:
sqrt(r^2) = r
sqrt(9.1295) = 3.021
r = 3 inches
Answer:
1/(x^(17/12)y^(5/3))
Step-by-step explanation:
We assume you want to simplify the expression. The applicable rules of exponents are ...
(a^b)(a^c) = a^(b+c)
(a^b)^c = a^(bc)
1/a^b = a^-b
Using these "all at once", we can add up the exponents of each of the variables:
x^(-2/3 -2·0 -(1/2)(3/2))·y^(-2/3-(1/2)·2) = x^(-2/3-3/4)y^(-2/3-1)
= x^(-17/12)y^(-5/3)
= 
4x+9=17
4x-9=-9
4x=8
4x/4=8/4
X=2
Answer: 142 - 75 = 9h
Step-by-step explanation: ok so if 142 is total then subtract 75 from 142 to get 67 if you wanted to know the answer
mark me brainliest if it helped