Answer:
Step-by-step explanation:
Answer:
1.68
Step-by-step explanation:
1. Move all of the terms to the left side and set the problem equal to zero.
2. Set each factor equal to zero.
Answer:
1
Step-by-step explanation:
(-1) × (-1) × (-1) × (-1)
And - × - = +
+ × + = +
- × + = -
: = 1
Hello from MrBillDoesMath!
Answer: Choice "B", which is 3
Discussion:
The consecutive integers <= 7 are
1,2,3,4,5,6,7
4 is the largest number in this list that makes sense in this problem (for example, 5 + 6 > 7, 7 + 6 > 7 don't satisfy the problem)
1 + 2 = 3 <= 7
2 + 3 = 5 <= 7
3 +4 = 7 <=7 (*)
The lesser integer in the last equation (*) is 3
Thank you,
MrB
Answer:
8 hours
Step-by-step explanation:
If two people shovel at the same rate, they can do the job in half the time.
We have ...
(Dad) + (Mom + Isabel) ⇒ 2 hours . . . . half as long as Dad alone
Dad ⇒ 4 hours
This tells us that ...
(Mom +Isabel) = 4 hours
We know that ...
Isabel ⇒ 2×4 hours = 8 hours . . . . twice as long as Mom + Isabel
So, we conclude ...
Mom ⇒ 8 hours
It would take Mom 8 hours to shovel the driveway herself.
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<em>Additional comment</em>
The rates add when expressed as driveways per hour.
total = Dad + Mom + Isabel
1/2 = 1/4 + 1/m + 1/(2·4)
1/m = 4/8 -3/8 = 1/8
m = 8 . . . . . it takes Mom 8 hours by herself.