And explain why is that is the answer

Answers

Answer 1

Answer: 3. With Inverse functions you just swap the x and the y values

Answer 2

Answer: 3 function because it has purenteses

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The expression 8 x ( 2 + 1 ) ^2 divided by 3 = ____
-16t squared + 16t + 480 t=time after jumping in seconds h=height in feet How many seconds did did it take her to hit the water

40 cm ___ 4 m

A : >
B : <
C : =

Answers

B: <
4 m = 400 cm
so 40cm is smaller than 400cm

Answer:

Step-by-step explanation:

What is the exact volume of a sphere with a diameter of 30 in.?

____ pi in^3

Answers

Volume of a sphere = 4/3 pi r^3 = 4/3 pi * (30/2)^3 = 4/3 pi * 15^3 = 4/3 pi * 3375 = 4500 pi in^3

Which two numbers add up to 5 and multiply to -45 ?

Answers

we have x+y=5
xy=-45
solve
x+y=5
subtract x from both sides
y=-x+5
subsiute -x+5 for y in second equaiton
x(-x+5)=-45
-x^2+5x=-45
add 2x^2-5x to both sides
0=x^2-5x-45
use quadratic equation which is
if you have 0=ax^2+bx+c then x= $\frac{-b+ \sqrt{b^(2)-4ac} }{2a}$ or $\frac{-b- \sqrt{b^(2)-4ac} }{2a}$
sbsitute
1x^2-5x-45
a=1
b=-5
c=-45
subsitute
$\frac{-(-5)+ \sqrt{-5^(2)-4(1)(-45)} }{2(1)}$
$(5+ √(25-(-180)) )/(2)$
$(5+ √(25+180) )/(2)$
$(5+ √(205) )/(2)$