Charles is 19 years old. his grandfather is 67 years older than he. what was thee total age 9 years ago?

87 years

Step-by-step explanation:

To find the total age 9 years ago you would subtract 9 from Charles's age only, 19. His grandfather is still always going to be 67 years older than he.

19 - 9 = 10

Add 10 and 67 together to find his grandfather's age back then.

10 + 67 = 77

Now add 10 and 77 together.

10 + 77 = 87

The total age 9 years ago was 87 years.

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.