First off, turn 7 1/4 into a mixed number, 29/4. change 29/4  /  5/6   into a multiplication question by flipping 5/6 into 6/5 (AKA multiplying by the reciprocal) so you get 29/4  X  6/5. then multiply so you get 174/20. Next, simplify into a mixed number by seeing how many times 20 goes into 174, and then putting the leftovers into a fraction, so you get 8 14/20, then simplify even further so you get 8 7/10. 
        
             
        
        
        
Answer:
Mean SAT score for Stevens High graduates are not the same as the national average.    
Step-by-step explanation:
We are given the following information in question:
Population mean, μ = 510
Sample mean,  = 501
 = 501
Sample size, n = 50
Alpha, α = 0.10
Sample standard deviation, s = 30
First, we design the null and the alternate hypothesis

We use Two-tailed t test to perform this hypothesis.
Formula:
 Putting all the values, we have,
 Putting all the values, we have,
 Now,
 Now,
 Since,
 Since,              
 
We reject the null hypothesis and fail to accept it.
We accept the alternate hypothesis and mean SAT score for Stevens High graduates are not the same as the national average.
 
        
             
        
        
        
Using a system of equations, it is found that the unit prices are:
- $2.25 for a bag of chips.
- $1.50 for a liter of pop.
- $1.75 for a chocolate bar.
For the system:
- x is the unit price of a bag of chips.
- y is the unit price of liter of pop.
- z is the unit price for a chocolate bar.
From the table, the equations are:



Replacing the <u>first equation on the second and the third:</u>









Since  :
:




Then:


The unit prices are:
- $2.25 for a bag of chips.
- $1.50 for a liter of pop.
- $1.75 for a chocolate bar.
A similar problem, also solved using a system of equations, is given at brainly.com/question/14183076
 
        
             
        
        
        
Answer:
Step-by-step explanation:
4
For example long division of 30 by 2 first 2 divided by 3 is 1 put it down then multiply 1 by 2 and subract then just repeat
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
2 1/2 + x = 5 1/3                Change the mixed numbers to improper fractions
5/2 + x = 16/3                   The lowest common multiple is 6. Multiply by 6
5*3 + 6x = 16*2
15 + 6x = 32                      Subtract 15 from both sides.
6x = 32 - 15
6x = 17                              Divide by 6
6x/6 = 17/6
x = 2 5/6
Check
5/2 + 17/6 = 16/3
15/6 + 17/6 = 32/6
32/6 = 32/6                    The question checks.