Challenge 1:
the sum of two numbers is 20, and the difference between their squares is 40. find the numbers.
challenge 2:
what is the number?
it is greater than 15 squared. it is not a multiple of 3 or 5, but a multiple of 4. it is less than 20
squared. it is not a multiple of 17. it is a square number.

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:

if you was gonna solve for a, a is a   < -12

step-by-step explanation:

the answer is in the picture

i’m kinda new to precal but your answer should be 21. hope i got it right.

step-by-step explanation: