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Genrish500 [490]
2 years ago
7

Show you work for full credit Use the SUBSITUTION method or ELIMINATION method to solve this system of equations. y = 4x and 8x

+ y = 18

Mathematics
1 answer:
vodka [1.7K]2 years ago
8 0

Answer:

A. (3/2, 6)

Step-by-step explanation:

Use the substitution method:

8x + y = 18 and y = 4x

8x +4x = 18

12x = 18

x = 18/12 = 3/2

y = 4x

= 4(3/2)

= 12/2

= 6

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Allison’s car can drive 450 miles on just 12 gallons of gas. What’s the mileage per gallon?
Arte-miy333 [17]

Answer:

37.5 Miles Per Gallon

Step-by-step explanation:

The Mileage of a car is the total number of miles driven divided by the total number of gallons (liters) of gas used.

For this problem, the units is miles per gallon

Allison can drive 450 miles with 12 gallons of gas. So

Total Miles Driver = 450 miles

Total Gas = 12 gallons

Hence, the mileage would be 450 divided by 12:

Mileage = 450/12 = 37.5 Miles Per Gallon

3 0
3 years ago
Which polynomials, given in square inches, could represent the area of a square with whole number side lengths if x is a whole n
Alex73 [517]

Answer:

~x2 − 4x + 4; ~x2 + 10x + 25

Step-by-step explanation:

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6 0
3 years ago
A rectangle has a length that is five times longer than its width. If the perimeter of the rectangle is 12 inches, what is the w
gulaghasi [49]

Answer:

Width= 1\,inch

Step-by-step explanation:

Length=5\times Width ,  i.e

L=5W

Perimeter=12\,inches

Perimeter of a rectangle is:

                    2(Length+Width)

12=2(5W+W)\\\\12=2(6W)\\\\\dfrac{12}{2} =6W\\\\6=6W\\\\W=\dfrac{6}{6} \\\\W=1\,inch

Width of the rectangle is: 1\,inch

Length=5\times Width

Length=5\times1\\\\Length=5\,inches

4 0
3 years ago
Read 2 more answers
I'm answering any 5th grade and below questions​
Anestetic [448]

Answer:

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Step-by-step explanation:

3 0
3 years ago
Is 5/16 needle length smaller than 1/4?
Maksim231197 [3]
No.
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7 0
3 years ago
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