Last question for this test .

See below ^_^

Step-by-step explanation:

In order to find the range you must minus the smallest number from the biggest number.

In this case the biggest number is 17.5 and the smallest is 12.3

Therefore the range:

=17.5-12.3

=5.2

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

4 puzzles in 3 hours

step-by-step explanation: