What is the equation of a line that passes through (7,8) and has a slope of -3

Mathematics

2 answers:

WINSTONCH [101]3 years ago

7 0

You use y=mx+b, then substitute -3 for the slope (m) and 7 for x and 8 for y, after you substitute all those things - use that equation to solve for the b-term - that will give you the y-intercept. Then you will rewrite the equation of the line as y=-3x+(whatever you just found for b).

Komok [63]3 years ago

3 0

It is helpful to first plug this in to point-slope form (note that there are other ways to do this).

Using the form $y-y_1 = m(x-x_1)$ , you get $y-8=-3(x-7)$ . You can simplify this to get $y = -3x+29$ .

Answer choice A

You might be interested in

(−14x^3y^3+4x^5 y6)÷(2x^4y^5)

valkas [14]

( - 14x^3)(y^3) + 4x^5y^6)/(2x^4y^5)

= 4x^5y^6 - 14x^3y^3/2x^4y^5

= 4x^2y^3 - 14/2xy^2

= 2x^2y^3 - 7/xy^2

Answer: 2x^2y^3 - 7/xy^2

Hope that helps!!!!

7 0

2 years ago

A bus covers a distance of 2.45 km in 2 min. What is the speed of bus?

Vladimir [108]

Answer:

The speed of the bus is 74.242 kilometers per hour.

Step-by-step explanation:

Let suppose that bus runs at constant speed and that speed is measured in kilometers per hour. Then, the speed of the bus ( $v$ ), in kiometers per hour, is determined by following kinematic expression: