Answer:
1275
Step-by-step explanation:
- .03 times 8500 is 255 so 255 times 5 is 1275
The terms of the polynomial are 45b and 27. You can start finding the GCF by finding the GCf of 45 and 27.
The factors of 45 are 1, 3, 5, 9, 15, and 45.
The factors of 27 are 1, 3, 9, and 27.
Their highest common factor is 9. Since 27 doesn't have a variable attached to it, the GCF can only be a number. So, the GCF of the terms is 9.
X = -6.4
First, you would subtract 8 on both sides:
-2.5x + 8 - 8 = 24 - 8
The 8 cancels out on the left side of the equation, and 24 - 8 = 16
Next, divide both sides by -2.5, to get rid of the number that is multiplying by x.
-2.5x/-2.5 = 16/-2.5
= x = -6.4
*Remeber, when dividing a negative by a positive, the answer is negative. In this case, 6.4 is negative.
Answer:
4.3 hours
Step-by-step explanation:
Let the number of hours Sally does a job = x
Let the number did hours Joan does a job be equal to y
Sally and Joan were able to dust the house in 3 hours together.
1/x + 1/y = 1/3
It takes Joan 10 hours to finish the same job alone.
Hence,
1/x + 1/10 = 1/3
1/x = 1/3 - 1/10
Least common dey = 30
1/x = 10 - 3/30
1/x = 7/30
Cross Multiply
x × 7 = 30
7x = 30
x = 30/7
x = 4.2857142857 hours
Approximately = 4.3 hours
Without help, it would take Sally 4.3 hours to finish the same job.