Which expression would be easier to simplify if you used the commutative property to change the order of the numbers? A. 130 + 70 + (-61)
B. -30 + (-90) + 12
C. 1/4 + 1/2 + 3/4
D. 3/2 + 1/2 +(-57​

Find the missing number. a. 3 : 24 = : 72 b. : 18 = 5 : 9 c. 6: = 36 : 36

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Read the following two statements. then use the law of syllogism to draw a conclusion. if the tv is too loud, then it will give me a headache. if i have a headache, then i will have to rest.