In a class in which the final course grade depends entirely on the average of four equally weighted 100-point tests, Lisa has scored 87 , 86 , and 74 on the first three. What range of scores on the fourth test will give Lisa a C for the semester (an average between 70 and 79 , inclusive)? Assume that all test scores have a non-negative value. Write your answer in interval notation.

a variable is any characteristics, number, or quantity that can be measured or counted. a variable may also be called a data item. hope i !

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation:

( - 4 , -7 )

all the lines must parallel  

step-by-step explanation:

coordinates of c = ( - 1 , 2 )

3 units left = ( -4 , 2 )

9 units down = ( - 4 , 11 )

i dont understand

step-by-step explanation: