A teacher asked has three students, Tom, Helen and Sandy to complete 200 exercises. The ratio of the exercises completed by Tom to the exercises completed by Helen to the exercises completed by Sandy is 3:3:4. Tom receives 8points for each exercise. If the three students altogether receive 1240 points, how many points does Helen receive for a completed exercise?

for a it would be 24 children.

for b i don't understand the question. is it saying for each individual person they pick 5 reds to 7 greens or is it the whole group. clarify and i hope this can you.

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.