HEY PLEASE 4. Mrs. Smith bought two pencils and four notebooks at Staples for a total of $11.86. Mr. Jones
bought six pencils and three notebooks for $12.27 at Staples. Write and solve a system of
equations to determine the cost of one notebook and the cost of one pencil.
Let: X=
y=

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b

150.6

all i did was i multiplied 5.02 by 30