Math

What are the x-intercept and the y-intercept of the graph of 9x-7y=-63

• x-intercept: 7; y-intercept:-9

• x-intercept:-7; y-intercept:9

• x-intercept: 9; y-intercept: -7

• x-intercept: -9; y-intercept: 7

Derek has $20 to spend on used books. Hardcover books cost $5 each and paperbacks cost $2 each. What equation in standard form determines the number x of hardcover books and the number y of paperback books he can buy?

• 20x=5y+2

• 5+2=20xy

• 5x+2y=20

• 7xy=20

For the situation of an item 14, which of the following represents a possible combination of books that Derek can buy? Select all that apply.

• (-2,15)

• (0,10)

• (2,5)

• (3,5/2)

What is an equation in point-slope form of the line that passes through the point (4,-1) and has a slope of 6?

• y+1=6(x-4)

• y+1=-6(x-4)

• y-1=6(x+4)

• y-1=-6(x+4)

What is an equation in point-slope form of the line that passes through (-7,1) and (-3,9)?

• y+3=2(x-9)

• y-3=2(x+9)

• y+9=2(x-3)

• y-9=2(x+3)

Which of the following is an equation of the line through (2, 3) and (-1, -12)? (hint: m=y1-y2/m1-m2)

• y=1/5x+13/5

• y=-1/5x+17/5

• y=5x-7

• y=-5x+7