Isaiah went skiing in the mountains for four days. the temperatures for the four days were: day one: −8°f day two: +2°f day three: −7°f day four: −12°f which temperature was the coldest? a −8°f b +2°f c −7°f d −12°f

The correct answer is D -12°F

Explanation:

Numbers are symbols we use to express quantities or measure something. In this context, each number represents a specific quantity and the higher the number is, the more quantity it represents. For example, 2 apples represent a smaller quantity than 20 apples. This applies to positive numbers that go from 0 to the infinite. Besides this, there are negative numbers that are the opposite of positive numbers as they represent amounts that are below zero this are organized as 0, -1, -2, -3, etc. which means in negative numbers the larger the number the smaller quantity it represents.

This implies, in the case of the temperatures provided that represent the quantity of heat in a zone during a day, the coolest temperature is -12 F because this is the highest negative number from the list and therefore the number that represents the smallest quantity, considering 2F° is the highest temperature, and this is followed by -7° F, -8° F and finally -12°F.

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1