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Marysya12 [62]
3 years ago
5

last year the sales at a bookstore were 75% fiction books, and 25% nonfiction books. The average coss of a fiction book was $15.

The average cost of a nonfiction book was $16. What was the averge costs of all fiction and non-fiction books sold at tthe bookstore last year? enter your answer as a decimal in the box
Mathematics
1 answer:
Tatiana [17]3 years ago
8 0
[75 x 15 + 25 x 16] / (75+25) = 1525/100
=$15.25
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Something dive (-9) = 6
Nataly_w [17]

Answer:

-3

Step-by-step explanation:

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3 years ago
There are 320 apples in a bag.James receives 45% of the apples, his brother receives 30% of the apples and his sister, Eden rece
Sav [38]

Answer:

20 apples

Step-by-step explanation:

First, there are 320 apples that need to be split up between the siblings. We are first working with percentages. The total amount will be 100 percent. James has 45% and his brother has 30%. 45% + 30% is 75%. We subtract that from 100% and get 25%. That means that Eden gets 25% of 320 apple's. That's 320 * .25 or 320 / 4. That is 80 apples for Eden. If she gives 75% of her 80 apples, that means she gives 60 apples away. 80*.75 = 60. Eden would then only have 20 apples left. 80-60=20.

3 0
3 years ago
Mhanifa please help :( no one has helped me on this yet
VMariaS [17]

Answer:

16)

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  • x = 44 tan 39
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  • 35.6 / y = sin 39
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18)

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3 0
3 years ago
Tell whether (2,0) is a solution of y=7x+ 2.
sattari [20]

Answer:

No

Step-by-step explanation:

7x2=14, 14+2=16, 16 is not 0.

5 0
3 years ago
Read 2 more answers
Help. Please. Thank You.
GenaCL600 [577]

Answer:

(A)\ a=-6;b=4\\\\ (B)\ a=6;b=-4

Step-by-step explanation:

The equation of the line in Slope-Intercept form is:

y=mx+c

Where "m" is the slope and "c" is the y-intercept.

By definition:

1. If the lines of the System of equations are parallel (whrn they have the same slope), the system has No solutions.

2. If the they are the same exact line, the System of equations has Infinite solutions.

(A) Let's solve for "y" from the first equation:

3x-2y=-1\\\\-2y=-3x-1\\\\y=\frac{3}{2}x+\frac{1}{2}

You can notice that:

m=\frac{3}{2}\\\\c=\frac{1}{2}

In order make that the System has No solutions, the slopes must be the same, but the y-intercept must not. Then, the values of "a" and "b" can be:

a=-6\\\\b=4

Substituting those values into the second equation and solving for "y", you get:

-6x+4y=-2\\\\4y=6x-2\\\\y=\frac{6}{4}x-{2}{4}\\\\y=\frac{3}{2}x-\frac{1}{2}

You can idenfity that:

m=\frac{3}{2}\\\\c=-\frac{1}{2}

Therefore, they are parallel.

(B) In order make that the System has Infinite solutions, the slopes and the y-intercepts of both equations must be the same. Then, the values of "a" and "b" can be:

a=6\\\\b=-4

If you substitute those values into the second equation and then you solve for "y", you get:

6x+(-4y)=-2\\\\-4y=-6x-2\\\\y=\frac{-6}{-4}x-\frac{2}{-4}\\\\y=\frac{3}{2}x+\frac{1}{2}

You can identify that:

m=\frac{3}{2}\\\\b=\frac{1}{2}

Therefore, they are the same line.

3 0
3 years ago
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