Question

If the point (a,3) lies on the graph of the equation 5x + y = 8, then a=

Answer 1

(a,3) means that when y=3, x=a. So, we plug y=3 into the equation, and solve it for x:
5x + y = 8
5x + 3 = 8 (because y=3)
5x = 5 (8-3)
x = 1 (5÷5)
a = 1 (Because x = a)

Answer 2

Indicate the equation of the line through (2, -4) and having slope of 3/5.

Answer 3

Do you know the formula for point-gradient form?
y-y₁ = m(x-x₁)
y+4 = 3/5(x-2)

Answer 4

No I dont Actually.

Answer 5

It's y-y₁ = m(x-x₁), where x₁ and y₁ are the x and y co-ordinates of the point you're given, and m is the slope of the line.

Answer 6

Ok Thanks alot.