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2 years ago

A) Complete the table of values for x + 2y = 7

Mathematics

2 answers:

lozanna [386]2 years ago

7 0

Answer:

4.5 , 4 , 3.5 , 3 , 2.5 , 2

Step-by-step explanation:

It's really easy

we need to replace value of 'x' in x+2y=7 by the given values and find the value of y and write it in the table

so first the value of x is -2

replacing value of x by -2

x+2y=7

or, -2+2y=7

or, 2y = 7+2

or, y= 9/2

or, y= 4.5

and we do the same process for other values of x and y

Marrrta [24]2 years ago

3 0

The values for y are as follows
4.5, 4, 3.5, 3, 2.5, 2

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#7. What are the values/ how do I do it

Tasya [4]

Answer:

x =2

SK = 21

KY = 13

SY = 34

Step-by-step explanation:

we can see from the picture the following:

SK + KY = SY equation 1

SK=13x-5 equation 2

KY = 2x+9 equation 3

SY = 36-x equation 4

using equation 2, equation 3 and equation 4 in equation 1 we have:

13x - 5 + 2x + 9 = 36-x

15x +4 = 36 - x

15x +x = 36-4

16x = 32

x = 32/16

x= 2

using x as 2 we evaluate it in equation 2, equation 3 and equation 4:

SK=13(2)-5 = 21

KY= 2(2) +9 = 13

SY = 36-2 = 34

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