Answer:
Anna is 41 years old.
Step-by-step explanation:
Easiest way to do this is by building a equation,
Lest say Anna's age is
.
Then as Peter is 3 years older than Anna Peter's age should be
.
Then the combined ages of the two people is given as 85. So we can write an equation as,



(deducting 3 from both sides of the equation)


As we originally took Anna;s age as 
We can say Anna is 41 years old.
Answer:
Division
Step-by-step explanation:
Answer:
x = 40
Step-by-step explanation:
The figure shows two similar triangles. Thus, the side lengths of similar triangles are proportional to each other. Therefore:


Cross multiply


Subtract 24x from each side


Divide both sides by -15

x = 40
Answer:
5
+5
Step-by-step explanation:
The core uses the value of the Pythagorean theorem and special angles.