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Alex_Xolod [135]
3 years ago
6

how to solve x-2y=8 and x=5-y using substitution method and showing work and please give me the correct answer

Mathematics
1 answer:
Murrr4er [49]3 years ago
6 0

Answer:

y = -1

Step-by-step explanation:

Set up

x-2y  = 8

Substitute 5-y for x

5 - y -2y = 8

Combine like terms

-3y + 5 = 8

Subtract 5 from both side

-3y = 3

Divide by -3

y = -1

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mestny [16]

Answer:

123,456,789 = 1.23456789\times 10^8

Step-by-step explanation:

It is required to find the value of the missing exponent in the below value i.e.

123,456,789 = 1.23456789\times 10^x

Let the exponent is x.

Any number can be written in the scientific notation as :

N=a\times 10^b

a is a real number

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In this case, the decimal is applied before 8 numbers. It means that the value of x is 8.

6 0
3 years ago
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11111nata11111 [884]

Answer:

20%

Step-by-step explanation:

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8 0
3 years ago
Please answer it now
Sergeeva-Olga [200]

Answer:

s= 15 (nearest integer), 14.8 (to nearest 10ths)

Step-by-step explanation:

here you need to apply the cosine rule,

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substituting the values,

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3 0
4 years ago
Work out the perimeter of this semicircle with radius 3cm. Give your answer in terms of π​
kondaur [170]

Step-by-step explanation:

<u>Given </u><u>:</u><u>-</u><u> </u>

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And we need to find the perimeter of the semicircle . We know the perimeter as ,

:\implies Perimeter = πr

:\implies Perimeter = 3cm × π

:\implies Perimeter = 3π cm .

Now there is the diameter of circle is 6cm . Hence totally the perimeter is ,

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We were supposed to give answers in terms of π .

<h3>Hence the perimeter is ( 3π + 6 ) cm</h3>
5 0
3 years ago
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vesna_86 [32]
<h3>Answer:  10%</h3>

Work Shown:

2/20 = 0.10 = 10%

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8 0
3 years ago
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