Plug in x with -1
A negative number in parenthesis times an exponent is always positive.
8+3-7=4
Answer:
a= 3 b=6 c= 5
Step-by-step explanation:
Answer:
g ≤ 56
Step-by-step explanation:
56 + 14 ≤ 70
70 ≤ 70
Answer:
24,48,96,192
Step-by-step explanation:
3*x =6
Divide by 3
3x/3 =6/2
x=2
We are multiply by 2
Check
6*2 =12
Correct
12*2 =24
24*2 =48
48*2= 96
96*2= 192
Answer:
Clarissa will take 10 hours by herself
Step-by-step explanation:
Let s = time for shawna
s-5 = time for clarissa
The formula for determining the time is
1/a + 1/b = 1/c where a and b are the times alone and c is the time together
1/s + 1/(s-5) = 1/6
Multiply each side by 6s(s-5) to clear the fractions
6s(s-5) ( 1/s + 1/(s-5)) = 1/6 *6s(s-5)
Distribute
6(s-5) + 6s = s(s-5)
Distribute
6s -30 +6s = s^2 -5s
Combine like terms
12s -30 = s^2 -5s
Move everything to the right
0 = s^2 -5s -12s +30
0 = s^2 -17s +30
Factor
0 = ( s-15) (s-2)
Using the zero product property
s-15 =0 s-2 =0
s =15 s=2 ( This is not a reasonable answer since it is less than the time together)
s=15
s-5 = 10
Clarissa will take 10 hours by herself