Marco does 70 extra math problems each week. 14(5)=70
Answer:
5
Step-by-step explanation:
because it is asking what minus 9 is equal to -4
One of the product rules for exponents was used.

Or, you can consider that the definition of an exponent and the associative and commutative properties of multiplication were used.
Answer:
20 in³
Step-by-step explanation:
Area of a triangle is half the base times the perpendicular height:
A=0.5bh
=0.5*10*4
=20
Answer:
Area=80 units squared
A=base*height
A=base*height/2
Step-by-step explanation:
7*8=56/2=28
7*8=56/2=28
3*8=24
28+28+24
56+24
80