Chris earned a 56, 90, and a 71 on his first 3 math tests. His goal is to have an 85 average in his math class. He has 7 tests remaining. What must he average on the 7 remaining tests to reach his goal?

90.44~ or approximately 90.5

Step-by-step explanation:

If you add the first three test scores plus 90.44 7 times you will get 850. 850 divided by 10 test scores equals 85.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

sas (side angle side)

aa(angle angle)

sss(side side side)

sas you have to find two sides with an angle in between

aa you find two angles because it will always add up to 180

sss find all sides

step-by-step explanation: