11:30-10:00=1 hr and 30 min
5:00-2:00=3 hrs
It's just one, if there isn't any other number attached to the x^2 you can just assume the leading coefficient is 1
So
Jon's age=j
mary age=m
m+j=27
m+2 times j=40
m+2j=40
M+j=27
ssubtract j from both sides
m=27-j
subsitute 27-j for m
27-j+2j=40
27+j=40
subtract 27 fromboth sdies
j=13
subsitue
13+m=27
subtract 13
m=14
mary=14
john=13
1.34 hectoliters (hl) = 134 liters (l)
(1 l = 100 centiliters (cl))
134 l = 13,400 cl
There are 13,400 cl in the bucket.
You just have to figure it where you can place 2 solid lines and get 10 triangles ( i can only get 9). Think about the pentagon in the middle of the triangles and see if somehow you can create more triangles using only the two straight lines.
