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oksano4ka [1.4K]
2 years ago
6

Suppose you have 20 coins that total $3.00. Some coins are nickels and some are quarters. Which of the following pairs of equati

ons would you use to find out how many of each coin you have?
Mathematics
1 answer:
kap26 [50]2 years ago
5 0

Answer:

Step-by-step explanation:

n + q = 20

.05n + .25q = 3.00

5n + 25q = 300

 n + q = 20

5n + 25q = 300

-5n - 5q = -100

20q = 200

q = 10 quarters

n + 10 = 20

n = 10 nickels

(10 nickels, 10 quarters)

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Select the correct answer.
Umnica [9.8K]
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The other's are incorrect.
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8 0
2 years ago
Read 2 more answers
Determine whether 52c2y4 is a monomial, binomial, trinomial, or other polynomial.
neonofarm [45]

Answer: Monomial.

Step-by-step explanation:

Ok, when we have a polynomial with only one term, this is a monomial.

If the polynomial has two terms, this is a binomial.

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In this particular case we have:

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5 0
2 years ago
-4 (r + 2) = 4 (2 - 2r)
Nady [450]

Answer:

r=4

Step-by-step explanation:

Let's solve your equation step-by-step.

−4(r+2)=4(2−2r)

Step 1: Simplify both sides of the equation.

−4(r+2)=4(2−2r)

(−4)(r)+(−4)(2)=(4)(2)+(4)(−2r)(Distribute)

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Step 4: Divide both sides by 4.

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=

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4

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Answer:

r=4

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Answer:

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Step-by-step explanation:

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