PSAT Practice Math Algebra

the temperature of magnesium must be at least 650 degrees for the metal to melt. A sample of magnesium is currently 255 degrees. The temperature of the magnesium is increased by 10 degrees every minute. Which inequality shows the number of minutes (m) needed to raise the temperature to the melting point?

• m > 39.5

• m > 87.5

• m ≥ 39.5

• m ≥ 87.5

Which inequality is true for all real numbers? Check all that apply.

• a – b < a + b

• ac ≥ bc

• If a ≥ b, then a + c ≥ b + c

• If a < b, then a < b + c

Q1. How many apples are there?

• 7

• 9

• 12

• 8

• A`

• B

• C

• D

If 6x= 25, what is the value of 3(x+ 1/2)?

• 53/6

• 51/2

• 13

• 14

Which of the following is equivalent to 3(x + 5)-6

• 3x-3

• 3x-1

• 3x+9

• 15x-6

• A

• B

• C

• D

• 9

• -9

• -3

• 3

Which of the following represents the equation of a line that passes through the points (1,2) and (3,8)?

The area of a rectangle is 45 square units. If the length of the rectangle is 9 units, what is the width?

• 4 units

• 5 units

• 6 units

• 7 units