Answer:
according to me its just multiplying with the number ( -2)
like 9×(-2) = -18
36×(-2) = -72

zeros of 2x^2+17x=-21 are (-7;0) and (-1,5)
P.S. Hello from Russia
The scuba diver must descend 3 feet in the fifth minute to meet the goal.
Why?
To find how many feet does the scuba diver need to descend to reach the goal of 35 feet in 5 minutes, we need to calculate how many feet he did descend on the first 4 minutes.
So, calculating we have:

Hence, we can see that at the 4 minute, he has only descended 32ft. It means that he need to descend 3 feet more in the fifth minute.
Have a nice day!
Answer:
C. Their slopes are equal.
Step-by-step explanation:
Given : If two lines are parallel.
To find : which statement must be true.
Solution : We have given that If two lines are parallel.
We know that two parallel line have same slope
By rise over run :
Therefore, C. Their slopes are equal
Step-by-step explanation:
Answer:
the scale factor is 2, but x is 11
Step-by-step explanation: