John is saving money to purchase a new video game system that cost $300 he has $94 and plans to save $7 each week for the next several weeks how many weeks will it take John to save for the video game system

Step-by-step explanation:

300-94 = 206$

206 ÷ 7 = 29.4 weeks

Approximately 30 weeks

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80