The equation of the straight line that passes through the points (0,0) and (1,4) is, a) y = 3x + 2
b) y = -x + 4
c) y = -4x + 2
d) y = 4x

d

Step-by-step explanation:

The equation of a line which passes through the origin is

y = mx ( where m is the slope )

Calculate m using the slope formula

m =

with (x₁, y₁ ) = (0, 0 ) and (x₂, y₂ ) = (1, 4)

m = = 4 , thus

y = 4x → d

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.