Janice has test scores 96, 84, 88, and 94. her score for homework is 100 and is weighted as a test grade. she still needs to take the final exam. what score does she need on the final exam to average atleast a 90.

Janice needs at least a 78 on the final exam

If x was 78, average is 90.

If x was 77, average would be an 89.83

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.