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timurjin [86]
3 years ago
7

Evaluate 5c-3d+115c−3d+115, c, minus, 3, d, plus, 11 when c=7c=7c, equals, 7 and d=8d=8d, equals, 8.

Mathematics
2 answers:
andrey2020 [161]3 years ago
6 0

Answer:

use substitution

(5 x 7) - (3 x 8) + 11= 35 - 24 + 11= 22

Anestetic [448]3 years ago
5 0

Answer:

Its 22 in simple words

Step-by-step explanation:

(5 x 7) - (3 x 8) + 11= 35 - 24 + 11= 22

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In planning her retirement, Liza deposits some money at 4.5% interest, with twice as much deposited at 5%. Find the amount depos
AlekseyPX

Let

x ----> amount deposited at 4.5%

y ----> amount deposited at 5%

we have that

y=2x----> equation A

4.5%=0.045

5%=0.05

so

0.045x+0.05y=1,595 ----> equation B

solve the system

substitute equation A in equation B

0.045(x)+0.05(2x)=1,595

solve for x

0.045x+0.10x=1,595

0.145x=1,595

x=11,000

Find y

y=2(11,000)=22,000

<h2>The amount deposited at 4.5% was $11,000 and the amount deposited at 5% was $22,000</h2>
5 0
1 year ago
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gladu [14]

Answer: B &E

Step-by-step explanation:

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3 years ago
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1. =7
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