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Mekhanik [1.2K]
3 years ago
13

A person has 20 coins consisting of dimes and quarters if the total amount of money is $4.70 how many quarters are there

Mathematics
1 answer:
aalyn [17]3 years ago
6 0
18 quarters and 2 dimes
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Question 3<br> Find the constant of variation (k).<br><br> -y + 9x = 0
egoroff_w [7]

Answer:

9

Step-by-step explanation:

-y + 9x = 0

y = 9x

y = kx

k = 9

3 0
3 years ago
What is the value of (f-g)(5)? a.-18 <br> b.-4 <br> c.16 <br> d.42
BARSIC [14]

Answer:

A

Simpel use have to use input outpout machine

5 0
2 years ago
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Solve for x:<br><br> 2(3x - 9) = 18x<br><br> x = -3/2<br><br> x = 3/2<br><br> x = 0<br><br> x = 6
Mila [183]
Remember yo can do anything to an equation as long as you do it to both sides

so
remember distributive property
a(b+c)=ab+ac

so first distribute
2(3x)+2(-9)=18x
6x-18=18x
minus 6x both sides
-18=12x
divide both sides by 12
-18/12=x
-9/6=x
-3/2=x

easier way is to first divide both sides by 2


x=-3/2
5 0
3 years ago
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A bag contains 5 white, 3 black, and 2 green balls. Balls are picked at random.
Soloha48 [4]

Answer:

look down there

Step-by-step explanation:

First ball:

Probability of drawing a white ball is 5/8

Probability of drawing a black ball is 3/8

Second ball:

This depends on the first ball drawn, lets say you drew a white ball initially, 4 white balls are left out of 7 balls in total. The probability of a white ball in the second pick is 4/7.

Total probability of drawing two white balls is 5/8*4/7 (since they are independent events).

If you picked a black ball initially, picking another black ball would have a probability of 2/7, on similar grounds , total prob for 2 blacks would be 3/8*2/7.

The probability that you pick 2 balls of same color is (5/14 + 3/28) = 13/28. (Since they are mutually exclusive events)

6 0
3 years ago
15
Butoxors [25]

Step-by-step explanation:

1/2 represents every fraction, where the denominator (bottom part) is twice the numerator (top part).

like 4/8 or 6/12 or 128/256 or ...

what do we need in the denominator to calculate with 15/16 ?

the same : 16.

and what is half of 16 ? 8.

so, we need the 1/2 based on 16th = 8/16.

so, the dog ate 8/16 (1/2) of the original 15/16.

what was left was

15/16 - 8/16 = 7/16 pound

7 0
2 years ago
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