Question 3 of 11 The temperature in Vancouver was recorded over a period of four hours. The
equation
y=-2x + 43
describes the temperature over this time, where y is the temperature in
degrees Fahrenheit (°F) and x is the number of hours since measurements
started. Which of the following statements correctly describes the
temperature?
O A. It was 43°F when the temperature was first measured, and it is
dropping by 2 degrees per hour.
O B. It was 43°F after four hours, and it is dropping by 2 degrees per
hour.
O C. It was -2°F when the temperature was first measured, and it is
rising by 43 degrees per hour.
O D. It was -2°F after four hours, and it is rising by 43 degrees per hour.
SUBMIT

x=30

step-by-step explanation:

step-by-step explanation:

divide, then simplify your answer.

1. make -15.66 ÷   5.8 a fraction. then divide.

2. simplify.  

3. final answer.  

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1

answer: i literally just answered this question but they want me to do it again

step-by-step explanation: