HELPPP :( Max is mountain hiking at a constant rate.

This equation y = 10x + 30 can be used to represent this situation, where y is Max's elevation in meters and x is the number of hours Max has been hiking.

Which statement best describes Max's elevation, given this equation?

Max started at a height of 10 meters and is ascending at 30 meters per hour.

Max started at a height of 10 meters and is descending at 30 meters per hour.

Max started at a height of 30 meters and is ascending at 10 meters per hour.

Max started at a height of 30 meters and is descending at 10 meters per hour.
(If you don’t know the answer, please don’t spam :<)

D.) Max started at a height of 30 meters and is ascending at 10 meters per hour.

the answer is C

Step-by-step explanation:

we will say x will = 1 for the explanation

here max starts at 30 meters and hikes for one hour, in the equation he hikes 10 meters per hour, so x is how many hours he hikes (in this case one) so we multiply 10 by x or 1 and get 10, that's the total amount of climbing he has done

however, remember that he started 30 meters ahead, so we put that in the function as + 30 at the end, saying that whatever the result of the first part, 30 is added to it representing the distance he climbed

i hope this helps, this applies to most functions like this

FUNFACT: the function used here is called a LINIER FUNCTION, its called this because the rate of change is constant, it doesn't vary or waver on a graph, its a straight line (hence the name)

70

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -