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3 years ago

Jeffrey set up chairs for a meeting.

Mathematics

1 answer:

Kazeer [188]3 years ago

3 0

Answer:

9x + 3 = 7x + 19

Step-by-step explanation:

Given that,

Jeffrey set up chairs for a meeting.

He arranged the chairs in 9 equal rows but had 3 chairs left over.

Let x be the number of chairs. So,

9x+3 .....(1)

Then he arranged the chairs in 7 equal rows but had 19 chairs left over. So,

7x+19 ......(2)

From equation (1) and (2),

9x+3 = 7x+19

9x-7x = 19-3

2x = 16

x = 8

Hence, the correct option is (b).

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<u>Step-by-step explanation:</u>

We are given a graph with y & x-axis , with 4 points given and best fit for data can be found out by joining points . On joining points , we see that best fit is a line . General equation of a line is : $y = mx + c$ ,

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Let's calculate slope m :

Consider any two given points , let's have ( 4,0) & (3,30) :

Slope = m

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⇒ m = $-30$

So , equation now becomes : $y = mx + c$

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