Mastering Numbers and Algebra

Convert 4500 to standard form.

• 4.5 x 10^2

• 45 x 10^2

• 4.5 x 10^3

• 450 x 10^1

Estimate the value of 19.7 + 4.3.

• 22

• 25

• 24

• 30

Solve for x: 3x + 5 = 20.

• 10

• 5

• 15

• 0

Use substitution to solve: x + y = 10 and x - y = 2.

• (5, 5)

• (8, 2)

• (6, 4)

• (4, 6)

Apply the elimination method to solve: 2x + 3y = 12 and 4x - y = 2.

• x = 1, y = 4

• x = 9/7, y = 22/7

• x = 2, y = 3

• x = 0, y = 4

Convert 0.00056 to standard form.

• 5.6 x 10^-4

• 0.056 x 10^-2

• 56 x 10^-6

• 5.6 x 10^4

Estimate the product of 23.4 and 4.6.

• 120

• 100

• 115

• 110

Solve for y: 5y - 3 = 2y + 9.

• -2

• 7

• 4

• 1

Use substitution to find x and y: 2x + 3y = 6 and x - y = 1.

• x = 9/5, y = 4/5

• x = 2, y = 0

• x = 3, y = 1

• x = 1, y = 2

Apply the elimination method to solve: 3x + 2y = 16 and 5x - 3y = 7.

• (0, 8)

• (2, 4)

• (3.2632, 3.2632)

• (1, 7)