3 years ago

Heeeeeeelp pleaseeee

Mathematics

2 answers:

Softa [21]3 years ago

6 0

Answer: I say ethier B or D i'm not sure caus i can't figure witch but i think this

Step-by-step explanation:

Readme [11.4K]3 years ago

4 0

I think its b? sorry if im wrong!!

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3 parentheses 2 minus 2 parentheses 3 parentheses 20 minus 2 parentheses

Monica [59]

Answer:

3(2-2) * 3(20-2)

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Step-by-step explanation:

3(2-2) * 3(20-2)

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3 years ago

A jar is filled with only dimes and quarters. The jar contains a total of 60 coins and the value of the jar is $11.25. How many

inessss [21]

Answer:

35 quarters

Step-by-step explanation:

This situation has two unknowns - the total number of dimes and the total number of quarters. Because we have two unknowns, we will write a system of equations with two equations using the two unknowns.

$d+q=60$ is an equation representing the total number of coins
$0.10d+0.25q=11.25$ is an equation representing the total value in money based on the number of coin. 0.10 and 0.25 come from the value of a dime and quarter individually.

We write the first equation in terms of q by subtracting it across the equal sign to get $d=60-q$ . We now substitute this for d in the second equation.

$0.10(60-q)+0.25q=11.25\\6-0.10q+0.25q=11.25\\6+0.15q=11.25$

After simplifying, we subtract 6 across and divide by the coefficient of q.

$6+0.15q=11.25\\0.15q=5.25\\q=35$

We now know of the 60 coins that 35 are quarters. To find the total value of the quarters, we multiply 35 by 0.25 and find 8.75.

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