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Triangle XYZ is an equilateral triangle. YW‾ \overline{\rm YW} YW is an altitude of the triangle. If XY‾ \overline{\rm XY} XY is 10 in., what is the length of the altitude?

(A)5 in.

(B)5 √3 in.

(C)10 in.

(D)10 √3 in.

(E)5√2 in.

The Correct Answer

In the xy-coordinate system, if (r, s) and (r + 2, s + t) are two points on the line defined by the equation y = 4x + 5, then t = ?

(A)4 (B) 5 (C) 8 (D) 9 (E) 11

Correct Answer: C

The ratio of boys to girls in a math class is 4 to 5. If there are 18 students in the class, how many are boys

(A) 2 (B) 4 (C) 8 (D) 12 (E) 13

Correct Answer: C

The highest and lowest test scores of five students in Mr. Canyon's science class are listed below. Which student had the greatest range of scores?

(F) Alicia (G) Brandon (H) Cleo (J) David (K) Emily

Correct Answer: K

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