question If 3 21k 3 21 what is the value of k

Math

If �×3=21k×3=21, what is the value of �k?

A. 5
B. 6
C. 7
D. 8

Divide 21 by 3 to find �k.

Solve for �x: 13(9−�)=231(9−x)=2

A. �=3x=3
B. �=4x=4
C. �=5x=5
D. �=6x=6

If 2�+7=152d+7=15, what is the value of �d?

A. 2
B. 4
C. 6
D. 8

What is the measure of each interior angle in a regular pentagon?

A. 60∘60∘
B. 90∘90∘
C. 108∘108∘
D. 120∘120∘

If a trapezoid has one base of length 6 units, another base of length 10 units, and a height of 8 units, what is its area?

A. 48 square units
B. 64 square units
C. 80 square units
D. 96 square units

The surface area of a cube is 5454 square units. What is the length of each side?

A. 22 units
B. 33 units
C. 44 units
D. 66 units

Solve for �x: 25(10+�)=652(10+x)=6

A. �=1x=1
B. �=2x=2
C. �=3x=3
D. �=4x=4

If 3553 of a number is 36, what is 1551 of that number?

A. 12
B. 18
C. 24
D. 30

If 2�−1=152g−1=15, what is the value of �g?

A. 7
B. 8
C. 9
D. 10

What is the measure of each interior angle of a regular octagon?

A. 45∘45∘
B. 90∘90∘
C. 135∘135∘
D. 160∘160∘

The ratio of the angles in a triangle is 2:3:4. What is the measure of the smallest angle?

A. 30 degrees
B. 40 degrees
C. 50 degrees
D. 60 degrees