What error did the student make when solving the equation:
1/5x + 6 = 3/5x + 5
1x + 6 = 3x + 5
-2x + 6 = 5
-2x = -1
x = ½

group of answer choices

the student did not multiply all terms by the common denominator

the student found an incorrect common denominator

the student did not use opposite operations appropriately

the student did not correctly eliminate the variable from one side of the equation

B) the student found an incorrect common denominator

Step-by-step explanation:

The error was in the second step - 1/5x and 3/5x do not become 1x and 3x, it becomes 4/5x. That was the mistake.

I hope this helps!

The answer is A. The student did not multiply all terms by the common denominator.

2

step-by-2step explanation:

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.