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Novosadov [1.4K]
3 years ago
7

What property is shown by the equation?

Mathematics
1 answer:
galben [10]3 years ago
6 0

wait what is it i needddd helllpppp


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A collection of dimes and quarters is worth $9.55. If the quarters were dimes and the dimes were quarters, the total value would
kvasek [131]

Number of dimes are 18 and number of quarters are 31

<em><u>Solution:</u></em>

Let "d" be the number of dimes

Let "q" be the number of quarters

value of 1 dime = $ 0.10

value of 1 quarter = $ 0.25

A collection of dimes and quarters is worth $9.55

value of 1 dime x number of dimes + value of 1 dime x number of quarters = 9.55

0.10d + 0.25q = 9.55 ---------- eqn 1

If the quarters were dimes and the dimes were quarters, the total value would be 7.60

quarters were dimes means , q = d

dimes were quarters means d = q

0.25d + 0.10q = 7.60 ----- eqn 2

Let us solve eqn 1 and eqn 2 to find "d" and "q"

Multiply eqn 1 by 2.5

0.25d + 0.625q = 23.875 ---- eqn 3

Subtract eqn 2 from eqn 3

0.25d + 0.625q = 23.875

0.25d + 0.10q = 7.60

( - ) ----------------------

0.525q = 16.275

q = 31

Substitute q = 31 in eqn 1

0.10d + 0.25q = 9.55

0.10d + 0.25(31) = 9.55

0.10d + 7.75 = 9.55

0.10d = 1.8

d = 18

Thus dimes are 18 and number of quarters are 31

5 0
3 years ago
Is 1+3√15 rational number and why
Vitek1552 [10]
Irrational because square root of 15 is irrational
5 0
3 years ago
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Some good f the Aliens have hairs on their heads that change color according to their emotions. If they're pleased hairs turn or
jeka94
7 because you divide the 27 from 3.
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3 years ago
Can someone help solve this problem??
Shtirlitz [24]

Answer:

the answer is 22

Step-by-step explanation:

-|-7|+|-2+17

the 7 becomes positive

(7|+|-2)+17

5+17

=22

7 0
3 years ago
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A small airplane can hold 44 passengers. Fifteen passengers board the plane. what is the solution.
Arada [10]
If I understand this problem correctly the answer would be 29 more people can board the plane! Hope this helps! Comment if you have questions!!!
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