Can someone me? ? i’m so clueless when it comes to math. #28?

(B) y = -1/2x

Step-by-step explanation:

A line has equation y = mx + b, in the slope-intercept form, where m = slope, and b = y-intercept.

The line passes through (0, 0), so the intercept is 0. b = 0. The equation of a line through (0, 0) is simply y = mx.

Now we use the points to find the slope, m.

m = ( 1 - 3)/(6 - 2) = -2/4 = -1/2

Now we replace m with the actual slope, -1/2.

y = mx

y = -1/2x

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0