If you have to estimate I will put $85 and then to find 20 % you just have to kniw that 10% is equal to 8.5 you just move a decimal then you just add 8.5 plus 8.5 = 17 so 20% of 85 is equal to $17 and to find 15% you already know how much is 10%=8.5 so you just need to find 5% that is equal to 4.25 and then you just add 4.25 to 8.5 and that's equal to 12.75
20%= 17
15%=12.5
        
                    
             
        
        
        
Distance = (rate)(time)
if you want o find the rate you have to get in by itself on one side so divide both sides by time
distance/time = rate
now replace the words with the values and complete the problem
(70 ft)/(10s) = rate
7 feet per sec = rate
The answer is that the unit rate is 7 feet per sec (or fps)
        
             
        
        
        
Answer:
The expression which is equivalent to –2i(6 – 7i) is; (0 – 2i)(6 – 7i)
 
        
             
        
        
        
1. Let's call the number of carter school: "x" and "y" the number of alternative school.  Then, you have that:
 - T<span>he number of charter schools is 4 less than twice the number of alternative schools.
</span> - T<span>here are 48 charter schools in the country.
 2. So, you have:
 x=2y-4  (i)
 x=48  (ii)
 3. Then, when you substitute x=48 into the equation (i), you obtain:
</span>
 x=2y-4
<span> 48=2y-4
 4. Now, you must clear "y, as below:
 48+4=2y
 2y=52
 y=52/2
 y=26
 </span><span>
 How many alternative schools are in the county?
</span><span>
 The answer is: There are 26 alternative schools.</span>