When mary was born, she weighed 8 pounds. when she was 10 years old, she weighed 10 times as much. how much more did mary weigh when she was 10 years old than when she was born? use exercises 1–2 to answer the question.
1. drawapicture,’s weight, w, when she was 10 years old.

she is 80 pounds

Step-by-step explanation:

because 8×10 is 80

when she was 10 years old she was 80 pound

8×10=80

80-10=70

When she was 10 she weight 70 pounds more than when she was born.

898.1666667

step-by-step explanation:

5389/6 = 898.1666667

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.