All categories

3 years ago

I really need help with these I have no brain when it comes to math T^T

Mathematics

1 answer:

umka21 [38]3 years ago

6 0

Answer: 4th option

Explanation:

x = 2/3 • pi • r^3
x divide by 2/3 = pi • r^3
x • 3/2 = pi • r^3
3x/2 = pi • r^3
3x/2 divide by pi = r^3
3x/2 • 1/pi = r^3
3x/2(pi) = r^3
Cube root(3x/2(pi)) = r

You might be interested in

Which of the following is NOT true?

dedylja [7]

The statement that is not true is

B. Perpendicular lines never intersect at right angles.

The definition of perpendicular lines is that they will intersect each other at 90 degree angles.

8 0

3 years ago

Read 2 more answers

20 points if you help me on this proublem

VMariaS [17]

Answer:

1) f(x) = x/8 - 7

2) f(x) = 1 - x/3

3) f(x) = 20 - 0.25x

4) f(x) = x + 7

Step-by-step explanation:

f^-1 = 8(x + 7)

x + 7 = y/8

x = y/8 - 7

f(x) = x/8 - 7

f^-1 = -3(x - 1)

y/-3 = x - 1

x = 1 - y/3

f(x) = 1 - x/3

f^-1 = 4(20 - x)

y/4 = 20 - x

x = 20 - y/4

f(x) = 20 - x/4

f(x) = 20 - 0.25x

f^-1 = x - 7

y = x - 7

x = y + 7

f(x) = x + 7

3 0

3 years ago

Two balls are pulled one after another, without replacement, from the box containing three black, five yellow, and seven red bal

kolezko [41]

Answer:

1/14

Step-by-step explanation:

5/15 × 3/14 = 1/14

Or 0.0714 (3sf)

6 0

3 years ago

A car is traveling at a rate of 44 feet per second. What is the cats rate in miles per hour? How many miles will the car travel

Citrus2011 [14]

It takes 3600 seconds for one hour. It takes 14400 seconds for four hours.

Hope I helped!

6 0

4 years ago

Find the number of real number solutions for the equation.x2 − 2x + 9 = 0

Talja [164]

Hi there!

We can use the discriminant of the quadratic formula to find the number of real solutions to this (or any other quadratic) equation.

The discriminant can be found by plugging in the data from the equation into the following formula:
$d = {b}^{2} - 4ac \\ with \: y \: = a {x}^{2} + bx + c$

When we fill in the data from the question we get
$d = ( - 2) {}^{2} - 4 \times 1 \times 9 = 4 - 36 = - 32$

Since d < 0 the equation has zero real solutions.

4 0

3 years ago