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Andre45 [30]
3 years ago
7

Identify the values of a, b, and c that would be used in the quadratic formula to solve the equation −9x = 13 − 5x2.

Mathematics
1 answer:
Softa [21]3 years ago
8 0
B. 

You would first have to add 9 to each side so that the equation equaled 0. Then you could pull these numbers. 
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What is the solution to the linear equation? 2/3x – 1/2 = 1/3 + 5/6 x
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Answer: x=-5

Step-by-step explanation:

You need to find the value of the variable "x".

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5 0
3 years ago
The Chang family and the Davis family each used their sprinklers last summer. The water output rate for the Chang family's sprin
denis-greek [22]

Answer:

The Chang family = 25 hours, The Davis  family = 35 hours

Step-by-step explanation:

The given information is as follow

The Chang family = 15L/h

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From this information we can derive a set of simultaneous equations to help us find our answer.

We need to find the following information

The time for the Chang family, taken as t1

The time for the Davis family, taken as t2

From this we derive the following set of equations

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2) 15(t1) + 40(t2) = 1775 ---- <em>(This is derived from total water output based on time for each sprinkler)</em>

<em />

Solving these simultaneously we get following equation

t1 = 60 - t2 - <em>equation 1</em>

15(t1) + 40(t2) = 1775 - <em>equation 2</em>

15 (60 - t2) + 40(t2) = 1775 - <em>equation 3 (combining equation 1 & equation 2)</em>

       900 - 15(t2) + 40(t2) = 1775   -------- solving the equation 3

            25(t2) = 1775 - 900

                 <u>t2 = 35</u>

                 <u>t1 = 25</u>

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