Answer:
The answer is 
Step-by-step explanation:
to solve this inequality:

Put "-7" on both sides

divide by 5 on both sides
your answer should be 2.
Answer: The average was 9 years old find the average age of both groups is 10 years old.
Step-by-step explanation:
Formula foe average : 
Given : The first group of students consists of 10 and their average age was 13 years old.
i.e.
(1)
The next group consisted of 30 students and their average was 9 years old.
i.e.
(2)
Then from (1) and (2) , the sum of both groups (first group and next group )students = 130+270 =400
Combined students of both groups (first and next group )= 10+30=40
Now , the average of both groups =

Hence, the average was 9 years old find the average age of both groups is 10 years old.
Answer: 96,672 yards cubed
Step-by-step explanation: The formula for the Volume of a rectangar prism is Length×Width×Height
114yds × 212yds × 4yds = 96,672yds^3
Its already in simplest form since its all yards
But, you can also convert it into miles
In which 1 mile = 1760 yards
So you'd divide 96670 by 1760, and what ever answer youget would be the answer in miles
12w+15r=18.30 /*2
15w+10r=16.75 /*3
24w+30r=36.60, subtract this equation from the other one
45w+30r=50.25
21w=13.65
w=13.65/21
w=0.65 is a cost per pound for wheat flour
From the first equation we have
r=(18.30-12w)/15
r=(18.30-12*0.65)/15
r=0.70 is a cost per pound for rye flour
Answer:
60
Step-by-step explanation:
let X be the total number of students.
48÷x *100 = 80
4800= 80x
X = 60 students