Its R
you can just see in figure as square root of 50 is approximately around 7.07
10.20
BECAUSE IF YOU ROUND THE TENTHS 4 MEANS 0.
y = mx + b
where m is the slope and b is the y-intercept.
Here, the slope is -3/2 and the y-intercept is 5.
y = -3/2x + 5
C=300+1200x-100x. Find x if the total cost is 3,000
3,000 = 300 + 1200x -100x
3000 = 300 + 1100x
2700 = 1100x
2700÷1100=x
x=27/11
x = 2 5/11
Round to 3
21: The factors of 21 are 1,3,7,21