4√13
64+144=208
208÷16=13
8²=64
12²=144
4²=16
Answer:
Just connect points Y and D with a straight line to make YD. Do the same for YE and YF, just attach Y to points E and F with a straight line.
Answer: Rikshaw bought it for 100. He lost 12% on selling it, so that means he must have sold it for 88. He wants to make 12% profit, so that means he should have sold it at 112.
But we know that he sold it for 2640.
Therefore, if 88 = 2640, 112 would be 2640*112/88 = 3360.
Since the average is <numbers combined> over <number of numbers>, we have 4+1=5 numbers (tests) and 92+91+94+79+x=356+x, resulting in
(356+x)/5=90. Multiplying both sides by 5, we get 356+x=450 and by subtracting 356 from both sides we get x=94 as the minimum score
