9 because a squre has equal sizes and area is leignth times width and 3 x 3= 9
To find area you multiply length times width because you have a 3cm square the length is 3cm and the width is 3cm so 3 x 3 = 9 so the area is 9cm²
1 week = 7 days
1 hour = 60 minutes
Part A
Write and solve an equation to find how
many hours Delia brushes her teeth in
1 week.
Part B
to find how
many minutes Delia brushes her teeth in
1 week.
Answer:
part A. 7
Part B. 420
Anzelm wants to burn 540 calories while jogging. Jogging burns about 12 calories per minute.
he usually plans to stop and rest for about 5 minutes.
m represents the total minutes.
12 calories per minute.
for m minutes the calories burn is 12m
He stop and rest for about 5 minutes. so we need to subtract 5 from total minutes
So expression becomes 12(m-5)
He wants to burn 540 calories. So we set the calories = 540
The equation becomes ,
12(m-5) = 540
Now we solve for m , total number of minutes
12(m-5) = 540(divide by 12 on both sides)
m - 5 = 45
m = 50 ( add 5 on both sides)
Anzelm should plan to be out jogging for 50 minutes