Write an equation that has a slope of 2 and goes through the point (2, 1).

Step-by-step explanation:

When given the slope and a point and we are asked to find the equation of the line, we can use the point-slope form.

The point-slope form is:

Let's let m be 2 and let (2,1) be x₁ and y₁. Thus:

Distribute the right:

Add 1 to both sides:

And that's our equation.

And we're done!

1st part is 64,000,000

2nd part 500,000

step-by-step explanation:

we need to divide the number of toy dinosaurs, 156, by the number of brothers, 4:

in order to estimate, we can use compatible numbers:

156 ÷ 4

  ↓

160   ÷ 4 = 40        

the correct answer is a).