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Zigmanuir [339]
3 years ago
13

Will give BRAINEST

Mathematics
1 answer:
pogonyaev3 years ago
3 0
-x + y = -3; 3x + 2y = 9 :| \text{Solve}

-2x+2y=-6; 3x+2y=9 

-5x=-15 

___________________________________________________

-5x=-15 

x= \dfrac{-15}{-5} 

x= \dfrac{15}{5}  

x=3 

___________________________________________________

-2*3+2y=-6 

-6+2y=-6 

2y-6=-6 

2y=0 

y=0

____________________________________________________

x=3; y=0
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Find y when x=77, if y varies inversly as x, and y = 23 when x = 115.
Eduardwww [97]

The required value of y is 2645 / 77 when x = 77.

Step-by-step explanation:

1. Let's check the information given to answer:

if y varies inversely as x, and y = 23 when x = 115. Find y when x=77

2. What is y when x = 77?

As the statement "y varies inversely as x" translates into y = k/x

If we let y = 23 and x = 115, the constant of variation becomes

        23 = k ÷ 115

        k = 23 × 115

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Thus the specification equation is y = 2645  ÷ x . Now, letting x = 77, we obtain

          y = 2645 ÷ x

          y = 2645 ÷ 77

<u>So, The required value of y = 2645 / 77 when x = 77</u>

<u></u>

<u>#learnwithBrainly</u>

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