Answer:
z + 5 = 30
Step-by-step explanation:
Substitute z = 25 into z + 5.
z + 5 = 25 + 5
= 30
Collect likes terms firstly
2z= -25
Divide everything by two to get the value of z
So your answer is -12.5
The number 4 represents the initially held water of the bucket. Then the correct option is B.
<h3>What is the linear system?</h3>
A linear system is one in which the parameter in the equation has a degree of one. It might have one, two, or even more variables.
A bucket holding several inches of water was placed under a leaking faucet.
Water leaking into the bucket so that the level of the water in the bucket increased by a certain number of inches per hour.
The equation y = 2x + 4 represents this situation, where x is the number of hours and y is the number of inches of water in the bucket.
Then the number 4 in the equation represents.
The number 4 represents the initially held water of the bucket.
More about the linear system link is given below.
brainly.com/question/20379472
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2x²+5x+5=0
Delta= b²-4ac
25-4(2)(5)
25-40
-15
Discriminant=-15
(No roots)