Answer:
267.5
302.5
372.5
600
Step-by-step explanation:
Simple interest
PV(1+it)
1 year:
250(1+.07)
267.5
3 years:
250(1+.07*3)
302.5
7 years:
250(1+.07*7)
372.5
20 years:
250(1+.07*20)
600
Answer/Step-by-step explanation:
3. By substitution method, let's substitute
for y in the first equation.
Thus,
Solve for x

Add 4 to both sides




Multiply both sides by 3


Divide both sides by 5

Now, substitute 3 for x in the equation.




The solution of the equation is x = 3, y = -2
4. Solving by elimination, let's try to eliminate the x-variable by adding both equation together.


=> 
Divide both sides by -3 to solve for y


Substitute -5 for y in the first equation to find x


Subtract 10 from both sides


Divide both sides by 3


The solution is 
Answer:
3(9+r)
Step-by-step explanation:
pretty sure that should be it if not then mb
Answer:
a) roller skating is 54 percent.....slides is only 46 percent
b) 8 th graders who want water slide = .14 / ( .14 + .06) = 70 percent
c) yes higher grade, higher want water slide
d) water slides ( see answer c )
Step-by-step explanation:
Hope this helps! (: