Alexander enjoys mountain biking. He has found that the maximum gradient which he can cycle up is 0.3, and the maximum gradient that he can safely descend is 0.5. His map has a
scale of 2 cm to 1 km, with contours every 25 m.
a. What is the minimum distance between the contours on his map that allows him to go uphill?
b. What is the minimum distance between the contours on his map that allows him to go
downhill?​

-3.396 = -3.4

-0.708 = -0.7

0.304 = 0.3

0.955 = 1

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?

this is a good question! i’ll do some research and what i find, i’ll contact you asap when i have something! ✊

step-by-step explanation:

rectangles are made up of 4 right angles, which means that a side and a base meet perpendicular to one another.   their slopes then have to reflect perpendicular slopes.   perpendicular slopes are opposite reciprocals of one another.   for example, if the slope of one line is +2/3, then the perpendicular slope to that would be -3/2.   so we look for that combination in our choices.

all of them satisfy that condition (so what's the question, i guess? )