Answer:
A- 480
Step-by-step explanation:
First, I'm going to work out 25% of 1200 for the before 1980 pennies.
10% = 120
20% = 240
5% = 60
240 + 60 = 300 pennies before 1980.
Next, work out 35% of 1200 instead.
20% = 240
+ 10%
30% = 360
+ 5% = 60
35% = 420 pennies from 1980-2000
Finally, work out how many pennies are leftover.
300 + 420 = 720
1200 - 720 = 480
A is the answer.
Hope this helps and have a good day!
Answer:1
Step-by-step explanation:
1+0=1
<span>Simplifying
g2 = 13 + -12g
Solving
g2 = 13 + -12g
Solving for variable 'g'.
Reorder the terms:
-13 + 12g + g2 = 13 + -12g + -13 + 12g
Reorder the terms:
-13 + 12g + g2 = 13 + -13 + -12g + 12g
Combine like terms: 13 + -13 = 0
-13 + 12g + g2 = 0 + -12g + 12g
-13 + 12g + g2 = -12g + 12g
Combine like terms: -12g + 12g = 0
-13 + 12g + g2 = 0
Factor a trinomial.
(-13 + -1g)(1 + -1g) = 0
Subproblem 1Set the factor '(-13 + -1g)' equal to zero and attempt to solve:
Simplifying
-13 + -1g = 0
Solving
-13 + -1g = 0
Move all terms containing g to the left, all other terms to the right.
Add '13' to each side of the equation.
-13 + 13 + -1g = 0 + 13
Combine like terms: -13 + 13 = 0
0 + -1g = 0 + 13
-1g = 0 + 13
Combine like terms: 0 + 13 = 13
-1g = 13
Divide each side by '-1'.
g = -13
Simplifying
g = -13
Subproblem 2Set the factor '(1 + -1g)' equal to zero and attempt to solve:
Simplifying
1 + -1g = 0
Solving
1 + -1g = 0
Move all terms containing g to the left, all other terms to the right.
Add '-1' to each side of the equation.
1 + -1 + -1g = 0 + -1
Combine like terms: 1 + -1 = 0
0 + -1g = 0 + -1
-1g = 0 + -1
Combine like terms: 0 + -1 = -1
-1g = -1
Divide each side by '-1'.
g = 1
Simplifying
g = 1Solutiong = {-13, 1}
lol srry this should be the answer you are looking 4 hope this helps</span>
Answer:
b and a i think
Step-by-step explanation:
Answer:
Step-by-step explanation:
b^2 - 4ac > 0
(-8)^2 - 4(1)(-2) = 64 + 8 = 72
two solutions