40 mins left! total time= 60 mins x 3 hours =180 mins. 180 divided by 9 is 20. 20 times 7 is 140. 180-140 equals 40. yay!
Answer:
329
Step-by-step explanation:
because i just did the assingment
haha lol I was looking for the answer too, but I solved it! Here it is:
Answer:
The slope of line s is b/a. Rotate line s 90° clockwise about the origin to get line t. The labeled points on line s map to (0, a) and (b, 0) on line t. The slope of line t is -a/b. The slopes of the lines are opposite reciprocals because the product of the slopes is -1.
So basically do 870/3x2 = 580 Spanish speaking boys.
Then 800/5x3 = 320 Spanish speaking girls.
In total 900 students speaking Spanish
