Answer:
a = 9
Step-by-step explanation:
First we need to add (x^2+3x) to (3x^2+ax),
(x^2+3x)+(3x^2+ax)
Expand
= x^2+3x+3x^2+ax
Collect the like terms
= x^2+3x^2+3x+ax
= 4x^2 + 3x + ax
= 4x^2+(3+a)x
Equate the solution to 4x^2+12x
4x^2+(3+a)x = 4x^2+12x
Comparing the like terms on both sides
(3+a)x =12x
3 + a = 12
a = 12 - 3
a = 9
Hence the value of a is 9
Area = 2,520m^2
(47+65)/2 = 56
56x45 = 2,520
Answer:
2
Step-by-step explanation:
4 + -2 = 2
<u>HOPE THIS HELPED!</u>
Answer:
63.8
Step-by-step explanation:
to the tenth
There are 2 zeros in the product because 6•5=30•10=300 so there are 2 zeros
