The math team has 57 members are in the 6th or 8th grade. there are twice as many 6th grades as 8th graders.

38 sixth graders.

Step-by-step explanation: 57-38=19. There is 19 7th graders. Twice of 19 is 38.

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.