Answer:
Step-by-step explanation:
To evaluate :
Solution:
Two negatives multiply to become a positive.
Thus, we can remove parenthesis by reversing the signs of the fraction by multiplying the negative outside.
⇒
Since the denominators are same for both fractions, so we simply add the numerators.
⇒
⇒ (Answer)
Answer:
b. 300x1 + 125x2 < = 4,000
Step-by-step explanation:
Maximum of 4,000 hours
This means that the the total amount of labor has to be of at most 4,000, that is:
300 ping-pong balls (x1) or 125 wiffle balls (x2) can be produced per hour of labor
The total amount of labor is:
Uniting the two equations:
And thus the correct answer is given by option b.
So we'll assume the number is x.
So,
15+= 9.
Now, we solve for x:
= 9-15
= -6
x = -6*2
x = -12
Check work:
15+= 9
15+(-6) = 9
15-6 = 9
9 = 9