Practice Math

On average, the moon is 384,400 kilometers from the Earth. How is this distance written in scientific notation?

• 0.3844 × 10⁻⁶

• 3.844 × 10⁻⁵

• 3.844 × 10⁵

• 0.3844 × 10⁶

An equation is shown. $ x^2 = 125 $ What are all the possible values of x?

• −5 only

• 5 only

• −5 and 5

• 5 and 25

In a science lab, substance X has a mass of 6.10 × 10⁻⁷ grams. The mass of substance Y is twice as much as that of substance X. What is the mass, in grams, of substance Y?

• 1.22 × 10⁻⁵

• 1.22 × 10⁻⁶

• 1.22 × 10⁻⁷

• 1.22 × 10⁻⁸

A system of equations is shown. y = (2/3)x – 6 3y – 2x = 9 How many solutions does the system have, and why?

• There are no solutions because the slopes and y-intercepts are the same.

• There are infinitely many solutions because the slopes and y-intercepts are the same.

• There are no solutions because the slopes are the same and the y-intercepts are different.

• There are infinitely many solutions because the slopes are the same and the y-intercepts are different.

Figure 1 is rotated 90° counterclockwise about the origin to form Figure 2. Select the three statements that are correct.

• BC ≅ ST

• ∠B ≅ ∠V

• ∠D ≅ ∠U

• ∠A ≅ ∠S

• AB ≅ RV

The dance floor at a hotel is in the shape of a square. The area of the ballroom floor is 576 square meters. To find the length, in meters, of each side of the dance floor, Jolie evaluates the expression shown. √576 What is the length, in meters, of each side of the dance floor?

• 16

• 24

• 144

• 288

Select the three expressions that are equal to 1.

• 1^-4

• (-1)^2 (-1)^6

• -1^6

• (-8)^0

• 2^1

Jonathan goes to a baseball game. At the beginning of each of the nine innings in the game, he estimates the percentage of seats in his section that are full. He makes a graph to show the relationship between the inning, x, and the percentage of seats in his section that are full. Which statement about the section in which Jonathan sits at the baseball game is most likely true?

• Most of the fans left during the eighth inning.

• The greatest number of fans arrived during the second inning.

• There was at least one point during the game in which Jonathan’s section was 100% full.

• The same seats were full at the beginning of the third inning as at the beginning of the sixth inning.

A square pyramid has a base that is 4 inches wide and a slant height of 7 inches. What is the surface area, in square inches, of the pyramid?

Which graph shows a linear function?

• A

• B

• C

• D