Complete the following tasks for this equation: b/7.8 = -2.15. Give an estimate for the solution. Be sure to explain how you arrived at the estimate, either by showing an equation or in words. Solve the equation. Show or explain your work. Compared to your estimate, is your answer reasonable? Explain your answer in complete sentences.

b = -16.77

Step-by-step explanation:

We could get a quick estimate from b/8 = -2:  b is approximately -16.

For an exact answer, multiply both sides by 7.8:  b = -16.77

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap

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.