Step-by-step explanation:
![\frac{135}{100} \times \frac{280}{1} = 378](https://tex.z-dn.net/?f=%20%5Cfrac%7B135%7D%7B100%7D%20%20%5Ctimes%20%20%5Cfrac%7B280%7D%7B1%7D%20%20%3D%20378)
Part A: There are 114 red marbles
Part B: There are 114 red marbles because if you multiply the ratio 19:1 times 6 you would get 114:6 (added together gives you 120)
The fraction is equal to 7 1/7.
To find out you see how much the denominator can go into the numerator, so in this case, 7 can go into 50 7 times so 7 is your whole number. there is 1 left over so that 1 is your numerator and you leave the denominator the same which gets you 7 1/7.
4a * 7c (-2 + -4)= -168ac.
I am pretty sure your answer is this because 3+2=5 and 5*7=35 abc