Question

The sum of two consecutive odd integers is 80. What is the smaller number?

41
43
37
39

Select the pair of equations whose graphs are perpendicular.

2x-8y=9
12x-3y=7

3x+6y=8
y=2x-8

y=2x-7
x+y=3

2y=-3x+5
2x+3y=4

Answer 1

first one u just chose the smallest num O.o
the second one find the slops in each case (m1,m2)
n the equations that gives u
m1×m2=-1 is perpendicular.

Answer 2

x-1+x-3=80
2x=84
x=42
so 42 -1=
42-3=

Answer 3

39