Question

(a) 3
If (a, 4) lies on the graph of 3x + y = 10, then the value of a is
(a) 3
(b) 1
(c) 2
(d) 4​

Answer 1

Answer:

2

3x+y=10 (a,4)

a is the value of x

4 is the value of y

we need to find a

3x+y=10 substitue 4 in y

3x+4=10

3x=10-4

3x=6

x=6/3

x=2

Answer 2

Answer:

(c)2.

Step-by-step explanation:

3x+y=10

3x+y=10given values of x & y is a,4

3x+y=10given values of x & y is a,4substitute value in place of x and y

3x+y=10given values of x & y is a,4substitute value in place of x and ywe get,3×a+4=10

3x+y=10given values of x & y is a,4substitute value in place of x and ywe get,3×a+4=103a=10-4

3x+y=10given values of x & y is a,4substitute value in place of x and ywe get,3×a+4=103a=10-43a=6

3x+y=10given values of x & y is a,4substitute value in place of x and ywe get,3×a+4=103a=10-43a=6a=6÷3

3x+y=10given values of x & y is a,4substitute value in place of x and ywe get,3×a+4=103a=10-43a=6a=6÷3a=2...

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