68 + 53 is 121. Here's a tip: when you see a + - (-) change the signs add a positive instead of subtracting a negative. makes math 100 times easier
Ac method
for
ax^2+bx+c
multiply a and c together
find what 2 numbers multiply to get ac and add to get b
split b up
gropu
factor
3x^2+7x+2
2 times 3=6
what 2 numbers multily to get 6 and ad to get 7
6 and 1
3x^2+6x+1x+2
(3x^2+6x)+(1x+2)
3x(x+2)+1(x+2)
(3x+1)(x+2) is factored
P(3) has a 10% chance (given)
P(1) or P(6): Add the two percentages together => 5 + 20 = 25%
P(not a 2): Subtract the percentage for 2 (25%) from 100% => 100 - 25 = 75%
Bolded numbers is your answer
hope this helps
2 16/99 as decimal should be:
2 + (16/99) = 2 +0.17 = 2.17
Answer:
23 of the coins will be quarters
Step-by-step explanation:
