question If 2 12a 2b 12 and 3 63a b 6 what are the values of a and b

Math

If �+2�=12a+2b=12 and 3�−�=63a−b=6, what are the values of �a and �b?

A. �=3,�=5a=3,b=5
B. �=4,�=4a=4,b=4
C. �=5,�=3a=5,b=3
D. �=6,�=2a=6,b=2

Solve the system of equations.

If the area of a square is 36 square units, what is its side length?

A. 4 units
B. 6 units
C. 9 units
D. 12 units

What is the value of 24×3224×32?

A. 48
B. 72
C. 144
D. 324

If the base of a triangle is 8 units and its height is 10 units, what is its area?

A. 20 square units
B. 32 square units
C. 40 square units
D. 48 square units

Solve: 23÷4532÷54

A. 5665
B. 815158
C. 10121210
D. 3223

What is the measure of each exterior angle of a regular pentagon?

A. 36∘36∘
B. 54∘54∘
C. 72∘72∘
D. 108∘108∘

What is the average of 15, 20, and 25?

A. 18
B. 20
C. 22
D. 25

What is the measure of each exterior angle of a regular hexagon?

A. 30∘30∘
B. 45∘45∘
C. 60∘60∘
D. 90∘90∘

If �:�=2:3x:y=2:3 and �:�=4:5y:z=4:5, what is �:�x:z?

A. 0.17013888889
B. 0.12847222222
C. 0.34375
D. 0.085416666667

A store initially had 120 items. If 25% were sold, how many items remain?

A. 60
B. 70
C. 80
D. 90

What is 15% of 80?

A. 8
B. 12
C. 15
D. 20