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Andrew [12]
3 years ago
7

The solution of a system of linear equations is (4,-2).

Mathematics
1 answer:
Romashka [77]3 years ago
3 0
Y=-x+2
2y=x-8
these two lines both go through the point (4,-2)
solve: substitute the y in the second equation with (-x+2):
2(-x+2)=x-8
-2x+4=x-8
add 2x on both sides:
4=3x-8
add 8 on both sides: 12=3x
divide by 3 on both sides: x=4.
find y: y=-x+2=-4+2=-2
the solution is (4,-2)
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How do i find the ratio 2:9
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3 years ago
What is the ratio of x to y<br><br> 14x = 9y<br><br> A) 14/9<br> B) 1/9<br> C) 1/14<br> D) 9/14
kirza4 [7]

Answer:

A) 14/9

Step-by-step explanation:

14 and 9 have no GCFs (Greatest Common Factors), so the ratio is simply 14/9.

5 0
3 years ago
A car is speeding at 60 miles per hour along a winding coastal highway. (The posted speed limit is 45 miles perhour). The speedi
Dmitry [639]
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8 0
4 years ago
A brick is 5/7 of a foot tall. If you need to build a brick wall that is 10 feet tall, how many bricks tall will the wall be?
svlad2 [7]

Answer:

7 1/7

Step-by-step explanation:

For the problem:

5 /7 × 10  = ?

Convert any mixed numbers to fractions:

10 = 10

Multiply all of the numerators by each other. Do the same with the denominators and form a new fraction with these values:

5 × 10

7 × 1

=  

50 /7

50 ÷ 7 = 7R1, therefore:

50 /7 =  7 1/7

The result is:

5

7

× 10 = 7 1/7

5 0
3 years ago
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