Answer:
7
Step-by-step explanation:
(x-2)^2
x^2-4x+4
-3^2-4(-3)+4=7
Answer:
x=2
Step-by-step explanation:
3(5x+2)=8x+20
Distribute the 3
15x +6 = 8x+20
Subtract 8x from each side
15x-8x +6 = 8x-8x+20
7x+6 = 20
Subtract 6 from each side
7x+6-6=20-6
7x=14
Divide each side by 7
7x/7 = 14/7
x=2
Answer:
$13,629.44
Step-by-step explanation:
Value of car after 3 years is:
V = $20,000(1.00-0.12)^3, or
$20,000(0.88)^3 = $13,629.44
On the tens one shade in 3 bars representig 3/10 kn the hunderes one shade in 30 squares
x + y = 1000, (1)
0.05x + 0.06y = 58. (2)
From (1), express y = 1000-x and then substitute it into (2)
0.05x + 0.06*(1000-x) = 58
0.05x + 60 - 0.06x = 58
-0.01x = 58 - 60 = -2 ====> x = %28-2%29%2F%28-0.01%29 = 200%2F1 = 200.
Answer. $200 was invested at 5%. The rest $1000 - $200 = $800 was invested at 6%.
Check. 200*0.05 + 800*0.06 = 58. ! Correct !
Solved. // I used the Substitution method to solve the system of 2 equations in 2 unknowns.
