(x+2)^3=x^3+2^3+3*x^2*2+3x*2^2=x^3+8+6x^2+12x
The coeficient of the x^2 is 6.
Answer:
3.5
Step-by-step explanation:
5.99+0.65=6.64
6.64-3.14=3.5
-35 + 28x = 21
28x = 56
x = 2
3x - 7 = 2x + 7
3x - 2x = 7 + 7
x = 14
2x + 7 + 12y + 1 = 180
2(14) + 7 + 12y + 1 = 180
12y + 36 = 180
12y = 144
y = 12
Answer
x = 14 and y = 12
9514 1404 393
Answer:
Step-by-step explanation:
The 1-year interest is simply the invested amount times the interest rate.
Let r represent the lower interest rate. Then r+0.02 is the higher rate, and the total interest earned is ...
1400r + 900(r +.02) = 202
2300r +18 = 202 . . . . . . . . . .simplify
2300r = 184 . . . . . . . . . .subtract 18
r = 184/2300 = 0.08 = 8% . . . . . . divide by the coefficient of r
$1400 was invested at 8%.
$900 was invested at 10%.
