Khan Academy Algebra

If 7x - 11 = 45, what is the value of x?

• x = 8

• x = 12

• x = 6

• x = 10

If 4x + 25 = 89, what is the value of x?

• x = 16

• x = 20

• x = 10

• x = 15

Which of the following is a solution to the graphed system of inequalities?

• (-3, -4)

• (3 , 1)

• (1, 3)

• (5 , 0)

What is the value of y in the solution to this system of equations? 3x - 5y = 22 y = -5x + 32

Mathematical Equivalence

ON

Graph the solution to the system. The first equation has been plotted for you.

y = -3x-3

y= 4x +4

The given system of equations relates the number of years Kareem has been playing Fortnite, K, to the number of years Tre has been playing Fortnite, T. In the system, what does the number 9 represent?

• The number of years Tre has been playing Fortnite

• The total number of years both Kareem and Tre have been playing Fortnite

• The number of years Kareem has been playing Fortnite

• How many more years Kareem has been playing Fornite than Tre.

What is the slope of the line that passes through the points (1, 5) and (-3, 8)?

• 0.25

• 3.5

• -0.75

• 2.25

Carl sells hot dogs for $1.50 each and bottles of Gatorade for $1.25 each. The given inequality represents the difference, in dollars, between hot dog and Gatorade sales on a typical day based on H, the number of hot dogs sold, and G, the number of Gatorade bottles sold. If Carl sold 140 hot dogs on a typical day, what is the maximum number of Gatorade bottles sold on that day?

• 60

• 88

• 100

• 120

The given system of equations has solution (x, y), what is the value of y?

• 5

• 3

• 4

• -2

The given system of equations has solution (x, y), what is the value of x?

• 1

• 7

• 4

• -2