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motikmotik
3 years ago
5

Solve each system by substitution y=2x-1. 3x+8y=11

Mathematics
2 answers:
OLga [1]3 years ago
8 0

Answer:

x=1, y=1

Step-by-step explanation:

Sub y=2x-1 into 3x+8y=11

3x+8(2x-1)=11

3x+16x-8=11

19x=11+8

19x=19

x=1

Sub x=1 into y=2x-1

y=2(1)-1

y=2-1

y=1

adoni [48]3 years ago
7 0
Since 8+3 already equals 11, x=1 and y=1
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Whatnis the greatest common factor of 7 and 19
viktelen [127]
7 and 19 are both prime numbers.
 
Factors of 7
1 * 7 = 7
7 * 1 = 7
factors are 1 and 7

Factors of 19
1 * 19 = 19
19 * 1 = 19
factors are 1 and 19

GCF = greater common factor
So GCF is 1 because there is no greater common number in the 7 and 19
7 0
4 years ago
I need help working this algebra 2 question 3/4 - 5/6R = 7/10
Brilliant_brown [7]

Answer:

R = 3/50

Step-by-step explanation:

If you are trying to solve for a variable,

1. Simplify both sides of the equation:

3/4 - 5/6R = 7/10 will now be (-5/6r) + 3/4 = 7/10

2. Add  -3/4 from both sides of the equation:

(-3/4) + 3/4 = 0 and (-3/4) - 7/10 = -1/20.

You will be left with: -5/6r = -1/20.

3. Divide both sides by (-5/6).

(-5/6r) / -5/6 = 1R or just R. (-1/20) / -5/6 = 3/50

You are left with the answer:

R = 3/50

<em>I hope this helps!</em>

4 0
3 years ago
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5 0
3 years ago
A builder is installing a fence on all four sides of a backyard. The yard is 40 feet long and 50 feet wide. How much fencing wil
Brums [2.3K]
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Answer:

$148.50.

Step-by-step explanation:

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For 9 hours she earns 16.50 * 9

= $148.50.

4 0
3 years ago
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