Amanda is participating in a 5 -day cross-country biking challenge. She biked for 41,69 ,49 , and 66 miles on the first four days. How many miles does she need to bike on the last day so that her average (mean) is 58 miles per day?

y = i/2 xtnop + (3i/2 tnop+ 1)

step-by-step explanation:

the picture is the step by step explanation.

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.