Each child in the smith family was given an orange cut into 8 equal sections. each child ate 5/8 of the orange. after combining the leftover sections, mrs. smith noted that there were exactly 3 full orangesleft. how many children are in the smith family?
the sample explanation for this question on 4th grade's practice book is not clear, could anyone give a easier explanation for a 4th grader.

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5