Answer:
12) y=25x
13) 14 gallons
Step-by-step explanation:
m= (y2-y1)/(x2-x1)
m= (75-50)/(3-2)
m=25/1=25
y-y1=m(x-x1)
y-75=25(x-3)
y-75=25x-75
y=25x
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350=25x
x=350/25
x=14
Answer:
x = 0.8 y = 0.6
Step-by-step explanation:
Solve one of the equations for a single variable, I chose the 2nd equation and solved for the variable y and I got y = 2x -1.
Next plug in the value for y into the 1st equation, I got :
2x + 4 ( 2x - 1) = 4
Next solve for x by first distributing the 4 to the (2x-1), this becomes (8x -4) then add like terms and move the -4 to the other side of the equation by addition. I got 10x =8 then I divided 8/10 to solve for x and I got 0.8.
Now plug the value 0.8 in for x in the 2nd equation : 2*(0.8) - y = 1
Then solve for y by subtracting 2*(0.8) or 1.6 from 1 and I got -0.6, lastly divide by -1 to solve for y.
Answer:
80 grams of plastic
Step-by-step explanation:
5 model cars -- 50 grams
1 model car -- (50/5) = 10 grams
8 model cars -- (10 * 8) = 80 grams
Thenks and mark me brainliest :)))
Answer:
x = -9
x = 2
Step-by-step explanation:
Given:
First, note that
Since and stay in the denominator, then
Now add two fractions which stay in the left part. The common denominator is so multiply the numerator of the first fraction by and the numerator of the second fraction by and subtract them in the numerator:
The surface area of a cube is:
A=6s^2 (It is just the area of 6 sides (squares) all having an area of s^2)
A=7.2^3=373.248 ft^3