Is the following relation a function?
2+
1+
.4 -3 -2 -11
2 3
-27
?

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.