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Vsevolod [243]
3 years ago
7

Mrs. Duran ordered a used book online. She paid a total of $5.65 for the book and shipping. The cost of the book alone was $3.31

. How much did she pay for shipping?
Mathematics
1 answer:
SVEN [57.7K]3 years ago
4 0
2.34............. hope it helps
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A french class has a total of 25 student.The number of males is 7 more than the number of females how many males and how many fe
Lady_Fox [76]

Answer:

16 males and 9 females

Step-by-step explanation:

To solve this we can use a system of equations.

Let's start by naming the number of females x.

The number of males would then be y.

<u>Using these variables, we can set up 2 equations using info provided:</u>

A french class has a total of 25 students, -> x+y=25

The number of males is 7 more than the number of females -> x+7=y

Use substitution to solve.

<u>From the second equation:</u>

x+7=y

Subtract 7 from both sides.

x=y-7

Substitute that into the first equation.

x+y=25

y-7+y=25

Combine like terms.

2y-7=25

Add 7 to both sides.

2y=32

Divide both sides by 2.

y=16

Substitute y=16 into equation 2.

x+7=y

x+7=16

Subtract 7 from both sides.

x=9

Therefore, there are 16 males and 9 females in the french class.

3 0
3 years ago
Read 2 more answers
Please help me :) please
dangina [55]

Answer:

In bold.

Step-by-step explanation:

6/6 = 9/a

So a = 9.

6/c = a/4.5

6/c = 9/4.5 = 2

So c = 3.

By similar triangles:

d/5 = 6/ (6+6+3)

d/5 = 6/15 = 2/5

So d = 2.

Also by similar triangles

b/5 = 12/15 = 4/5

So b = 4.

8 0
3 years ago
Complete the factored form.<br>3x4 + 16x + 21 = (3x + 7)( )​
jekas [21]

Answer:

x+3

Step-by-step explanation:

21=7x3. Hence answer is 3

8 0
3 years ago
An online movie rental company charges a one-time fee of $25 to join and $9.99 each month which variable is the independent vari
Mademuasel [1]

Answer:

The one time fee of $25 is the ibdependent variable.

Step-by-step explanation:

7 0
3 years ago
This school is also thinking of changing their mascot to an armadillo. To change mascot, a 55% supermajority is needed. How many
Dennis_Churaev [7]

Answer:

132 students

Step-by-step explanation:

100% means all of something, so 100% can also be written as 1.00

Since we need 55% of 240, we can multiply 240 by 0.55 and get 132.

5 0
3 years ago
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