Answer:
Second choice:
Fifth choice:
Step-by-step explanation:
Let's look at choice 1.
I'm going to subtract 1 on both sides for the first equation giving me . I will replace the in the second equation with this substitution from equation 1.
Expand using the distributive property and the identity :
So this not the desired result.
Let's look at choice 2.
Solve the first equation for by dividing both sides by 2:
.
Let's plug this into equation 2:
This is the desired result.
Choice 3:
Solve the first equation for by adding 3 on both sides:
.
Plug into second equation:
Expanding using the distributive property and the earlier identity mentioned to expand the binomial square:
Not the desired result.
Choice 4:
I'm going to solve the bottom equation for since I don't want to deal with square roots.
Add 3 on both sides:
Divide both sides by 2:
Plug into equation 1:
This is not the desired result because the variable will be squared now instead of the variable.
Choice 5:
Solve the first equation for by subtracting 1 on both sides:
.
Plug into equation 2:
Distribute and use the binomial square identity used earlier:
.
This is the desired result.
Answer:
52 hours
Step-by-step explanation:
Given that it takes 15 orders every 5 hours.
With that we can find that it takes 3 orders every hour. Using that we can find that in 52 they would have shipped 156 orders
With that we find that the answer is 52 hours
(1÷2)×(1÷2)×(1÷2)×(1÷2)×(1÷2)
Answer:
41.1
Step-by-step explanation:
The number will be cut off after the digit you are rounding off to.
Rewrite the number, but stop at the 0.
41.0
Now you need to decide if the 0 stays as 0 or if it goes up to 1.
When the next digit is from 5 to 9, the last digit you keep goes up 1. When the next digit is 0 through 4, the last digit you keep stays as it was.
Since the first digit that was dropped is a 7, the 0 goes up one unit to 1.
Answer: 41.1