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Hatshy [7]
3 years ago
9

Ralph has a collection of dimes and quarters. The ratio of dimes to quarters is 4:5. If the number

Mathematics
1 answer:
Murrr4er [49]3 years ago
5 0

Answer:

180

Step-by-step explanation:

4 times 20 is 80, and 4 times 5 is 100, so add those together and that's the total number of coins

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Can someone help me please?
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3 years ago
Help needed. Will mark brainliest. Please help:c
Alja [10]

Answer:

Kindly check explanation

Step-by-step explanation:

Given that:

Cost of owning and operating a printer :

Purchase Cost = $100

Printing per per page = $0.05

Thus, owning and operating cost :

Purchase cost + (Printing per page * number of pages)

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100 + 0.05p

Service cost :

Amount per page = 0.25

Total revenue = cost per page * number of pages

Total revenue from service =. 0.25p

The equation :

100 + 0.05p = 0.25p ; is the owning and operating cost = total revenue

It gives the equation to calculate the number of pages at which total revenue equals owning and operating cost.

100 + 0.05p = 0.25p

100 =0.25p - 0.05p

100 = 0.20p

p = 100/0.2

p = 500

When number of pages equals 500; the owning and operating cost is equal to the revenue made.

7 0
3 years ago
Solve: Factor the following polynomial completely -9x^2-30x-25
Korolek [52]

Answer:

(−3x−5)(3x+5)

Step-by-step explanation:

−9x2−30x−25

−9x2−30x−25

=(−3x−5)(3x+5)

3 0
3 years ago
Read 2 more answers
An escalator lifts people to the second floor of a building, 21 ft above the first floor. The escalator rises at a 30° angle. To
DerKrebs [107]

Answer:

42

Step-by-step explanation:

Sin 30=21/H

H=21/sin 30

H= 42

3 0
3 years ago
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