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3 years ago

Match the number with its opposite -5.4

Mathematics

2 answers:

kakasveta [241]3 years ago

8 0

5.4 is the answer. The opposite of a negative is a positive and vice versa

exis [7]3 years ago

8 0

It’s obviously 5.4 because that’s the opposite of -5.4

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gavmur [86]

Answer:

102 Non-Participation

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Step-by-step explanation:

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3 years ago

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Slope is change in y over change in x.
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4 years ago

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Ksju [112]

Answer:

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4 years ago

A building has 12 floors above ground level and 4 floors below ground level. The elevator stops 2 floors below ground level. Wha

goblinko [34]

I think that the answer is -2. Hope this helps.

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3 years ago

Shelley has a collection of dimes, nickels and quarters that is worth $5.25. There are a total of 48 coins. If there are 7 more

Mumz [18]

Answer:

25 dimes

Step-by-step explanation:

Given

Coins: Nickels (N), Quarters (Q) , and Dimes (D)

$0.05 = 1 nickel, $0.10 = 1 dime and $0.25 = 1 quarter

So, the amount implies:

$0.05N + 0.10D + 0.25Q = 5.25$

The number of coin implies:

$N + D + Q = 48$

and

$N = 7 + Q$

Required

Determine the number of Dimes

$0.05N + 0.10D + 0.25Q = 5.25$

$N + D + Q = 48$

$N = 7 + Q$

Substitute 7 + Q for N in the first and second equation

$0.05N + 0.10D + 0.25Q = 5.25$

$0.05(7 + Q) + 0.10D + 0.25Q = 5.25$

$0.35 + 0.05Q+ 0.10D + 0.25Q = 5.25$

Collect Like Terms

$0.10D + 0.25Q+0.05Q = 5.25 - 0.35$

$0.10D + 0.30Q = 4.90$ ----- (1)

$N + D + Q = 48$

$7 + Q + D + Q = 48$

Collect Like Terms

$D + Q + Q= 48 - 7$

$D + 2Q= 41$

Make Q the subject

$2Q = 41 - D$

$Q = \frac{41}{2} - \frac{D}{2}$

$Q = 20.5 - 0.50D$

Substitute 20.5 - 0.50D for Q in (1)

$0.10D + 0.30Q = 4.90$

$0.10D + 0.30(20.5 - 0.50D) = 4.90$

$0.10D + 0.30*20.5 - 0.30*0.50D = 4.90$

$0.10D + 6.15 - 0.15D = 4.90$

$0.10D - 0.15D = 4.90 - 6.15$

$-0.05D = -1.25$

Solve for D

$D = \frac{-1.25}{-0.05}$

$D = 25$

<em>Hence, there are 25 Dimes</em>

4 0

4 years ago