i've been stuck since yesterday.

#16
1092...if 4 out of 7 named blue then

1092 * 4/7 = 624 (named blue)

1092...if 1 out of 3 named red then

1092 * 1/3 = 364 (named red)

364 + 624 = 988 (both named red and blue)

1092 - 988 = 104( neither named red nor blue)

answer is 104 people

#17

49 * 15 / 21 = 35

answer is 35

Y=mx+b is how you wrte slope intercept whith m being the slope and the b being y value of the y intercept. so for this,
y=4x+2