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3 years ago

Ann has the 5 newest music CD's which is 3 less than twice the amount that Bob has.

1 answer:

8 0

We can write it down as:

5 = 2x - 3 / + 3 (both sides)
8 = 2x / : 2 (both sides)
x = 4

Bob has 4 CDs. Let's check it:

5 = 2 * 4 - 3
5 = 8 - 3
5 = 5

Correct.

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Rhianna and Sauron a wrote 35 songs . They mad CDs with 7 songs on each CD. How many CDs did they have left after they sold 3 to

myrzilka [38]

35 songs/7 songs= 5 CDs

5-3=2 CDs left after they sold 3

8 0

3 years ago

The graph of a function f is shown below. Find f(0).

lesantik [10]

Answer: f(0)=-1

Step-by-step explanation:

f(0) is a fancy way of saying the y value of the equation. the f(0) means that x=0. If you look at x=0, the graph is at y=-1. Therefore, f(0)=-1.

4 0

3 years ago

Read 2 more answers

If each of the following represents the slope of a line (or line segment), give the slope a line that is perpendicular to it. (a

Crank

Answer:

$m_2 = -\frac{3}{4}$ -- (a)

$m_2 = -\frac{7}{3}$ -- (b)

$m_2 = -\frac{1}{4}$ --- (c)

$m_2 = -3$ -- (d)

Step-by-step explanation:

Given

$a.\ m = \frac{4}{3}$

$b.\ m = \frac{3}{7}$

$c.\ m = 4$

$d.\ m = \frac{1}{3}$

Required

Determine the slope of a perpendicular line

In geometry, the condition for perpendicularity is:

$m_2 = -\frac{1}{m}$

This formula will be applied in solving these questions.

$a.\ m = \frac{4}{3}$

$m_2 = -\frac{1}{m}$

Substitute 4/3 for m

$m_2 = -\frac{1}{4/3}$

Express as a proper division

$m_2 = -1/ \frac{4}{3}$

Convert to *

$m_2 = -1* \frac{3}{4}$

$m_2 = -\frac{3}{4}$

$b.\ m = \frac{3}{7}$

$m_2 = -\frac{1}{m}$

Substitute 3/7 for m

$m_2 = -\frac{1}{3/7}$

Express as a proper division

$m_2 = -1/ \frac{3}{7}$

Convert to *

$m_2 = -1* \frac{7}{3}$

$m_2 = -\frac{7}{3}$

$c.\ m = 4$

$m_2 = -\frac{1}{m}$

Substitute 4 for m

$m_2 = -\frac{1}{4}$

$d.\ m = \frac{1}{3}$

$m_2 = -\frac{1}{m}$

Substitute 1/3 for m

$m_2 = -\frac{1}{1/3}$

Express as a proper division

$m_2 = -1/ \frac{1}{3}$

Convert to *

$m_2 = -1* \frac{3}{1}$

$m_2 = -\frac{3}{1}$

$m_2 = -3$

4 0

3 years ago

Everything changed when the fire nation attacked

sergejj [24]

Answer:

What is the question?

Step-by-step explanation:

7 0

3 years ago

Together, Dien and Jane can eat 2/3 of a pizza in 4 seconds. How long would it take each of them to eat the whole pizza alone if

Nezavi [6.7K]

Answer:

Dien - 15 seconds, Jane - 10 seconds

Step-by-step explanation:

Together:

2/3 of pizza ⇒ 4 seconds
Full pizza ⇒ 4 ÷ 2/3 = 6 seconds

Dien needs x seconds to eat pizza

Jane needs x - 5 seconds to eat pizza

In one second, Dien can eat 1/x, Jane can eat 1/(x - 5), together 1/6 of a pizza

1/x + 1/(x - 5) = 1/6
x(x - 5) = 6(x + x - 5)
x² - 5x - 12x + 30 = 0
x² - 17x + 30 = 0
(x - 15)(x - 2) = 0
x = 15 (x = 2 is discounted as not realistic)

Dien can eat a pizza in 15 seconds, Jane can eat a pizza in 10 seconds

5 0

3 years ago