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Alina [70]
3 years ago
5

A school library has 200 DVDs in its collection. Given that 40% of the DVDs are about science and 45% are about history, how man

y of the DVDs are about other subjects?
Mathematics
2 answers:
gregori [183]3 years ago
5 0

Answer:

15% so 30 dvds

Step-by-step explanation:

200 * 45% = 90 dvds

200 *40% = 80 dvds

200 - (90 + 80) = 30

now check

200 * 15% = 30 dvds

Paladinen [302]3 years ago
4 0

Answer:

The last 15 percent of that would be 39

Step-by-step explanation:

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Find the value of x that will make l and m 7x-7, 4x+14
ohaa [14]
<u><em>Answer:</em></u>
x = 7

<u><em>Explanation:</em></u>
<u>We are given that:</u>
l = 7x - 7
m = 4x + 14

<u>We want to have:</u>
l = m

<u>Therefore, we will simply equate the two equations and solve for x as follows:</u>
7x - 7 = 4x + 14
7x - 7 - 4x = 4x + 14 - 4x
3x - 7 = 14
3x - 7 + 7 = 14 + 7
3x = 21
x = \frac{21}{3}
x = 7

Hope this helps :)
6 0
3 years ago
Geoff has a bag that contains 4 red marbles and 6 blue marbles. He chooses two marbles at random and does not replace them. What
Virty [35]

Answer: \frac{4}{15}

<u>Step-by-step explanation:</u>

First pick (blue)     and        Second pick (red)

             \frac{6}{10}                  x                    \frac{4}{9}

= \frac{6(4)}{10(9)}

= \frac{2(2)}{5(3)}

= \frac{4}{15}

6 0
3 years ago
Read 2 more answers
5.2x-y=4.1 1.5x+y=6.7<br> how to solve this problem
MrRa [10]

Answer: x=1.6

y=4.2

Step-by-step explanation:

5.2x - y = 4.1

1.5x + y = 6.7

we will add both equations and you see that the y is getting cancelled

6.7x=10.8

x=10.8/6.7= 1.6

now in any equation we will replace x with 1.6

5.2(1.6)-y=4.1

8.3-y=4.1

  -y= 4.1-8.3

-y=-4.2  multiply by -1

y=4.2

8 0
3 years ago
Read 2 more answers
Pls help me with this
kvasek [131]

Answer:

1st one is positive

2nd one is negative

3rd one is negative

4th one is positive

Step-by-step explanation:

7 0
2 years ago
Carson Trucking is considering whether to expand its regional service center in? Mohab, UT. The expansion requires the expenditu
cupoosta [38]

Answer:

NPV = $ 17,200,000

Step-by-step explanation:

Total expenditures = $ 11,000,000

Net cash inflow = $ 3,000,000 per year

total duration of cash inflow = 9 years

Thus, total cash inflow = $ 3,000,000 per year × 9 years = $ 27,000,000

salvage value = $ 1.2 million = $ 1,200,000

NPV = Salvage value + total cash flow - Expenditures

on substituting the values, we get

NPV = $ 1,200,000 + $ 27,000,000 - $ 11,000,000

or

NPV = $ 17,200,000

6 0
3 years ago
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