9x + 3 = 7x +19
2x + 3 = 19
2x = 16
x = 8
So, x (8) is the number of chairs in each row with these setups.
Plug 8 into one of the equations and you will find how many chairs total there are.
9(8) + 3 = 75
There are 75 chairs total
Answer:
she started with 50 marbles
Step-by-step explanation:
The total is 100 than you just subtract 20 and 30 becasue that is what is added later on. After you subtract 20 and 30 from 100 you will get 50. Therefore Sara had started out with 50 marbles.
Hope that helps :)
Answer: D
Step-by-step explanation: I took the quiz. And also I worked it out
Answer:
3/10
Step-by-step explanation:
Given data
Sample space
3 red,
2 white, and
5 blue marbles.
Sample size
=3+2+5
=10
Hence the probability of picking a red marble is
=3/10
