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Georgia [21]
3 years ago
11

Please help me thank you so much:)

Mathematics
1 answer:
Galina-37 [17]3 years ago
4 0

Step-by-step explanation:

5 for $2.25 means 1 for $0.45

So, we have

1: 0.45

2: 0.9

3: 1.35

4: 1.8

10: 22.5

15: 33.75

20: 45

100: 225

n = 0.45c

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Elvira is 5 years older than Morton. Morton is twice as old as Michelle. The combined total of their ages is 85. How old is Mort
LiRa [457]

Elvira (e) is 5 years older than Morton (m)

e = m + 5

Morton (m) is twice as old as Michelle (c)

m = 2c

The combined total of their ages is 85

e + m + c = 85

We want m at the end so let's write everything in terms of m.

e = m + 5

c = m/2

85 = e + m + c = m+5 + m + m/2 = 5 + (5/2) m

m = (2/5) (85 - 5) = 32

Answer: 32 years old

Check:

That makes Elvira 37 and Michele 16, total 32+37+16=85, good


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