Answer:
y = 15
x = 43
Step-by-step explanation:
this is giving us a system of equations because we know two things:
x + y = 58
x - y = 28
take the second equation and format it where you have simplified it for one variable:
x = 28 + y
(we did this by adding y to both sides)
now substitute this new value of x into the <em>first </em>equation:
28 + y + y = 58
simplify this to get 2y = 30
divide both sides by 2: y = 15
now substitute your new value of y into the <em>second </em>equation:
x = 28 + 15
x = 43
Answer:
Step-by-step explanation:
use
i=prt
i=interest
p= principal value
r=rate
t=time
now you want to find time then it will be
t= i/pr
put values
t= 3722/(2000*7.6%)
t= 2 years
calculation is in fraction but your question given you annual interest so time will also be 2 years not in months
Let t = # of tricycles; let b = # of bikes.
# of trike wheels is 3t; # of bike wheels is 2b. Total number of wheels is 79, which equals 3t + 2b. t+b = 28, so t=28-b.
Subst. 28-b for t in the first equation:
3(28-b) + 2b = 79. Then 84-3b + 2b = 79, or 5 = b (answer)
There were (28-5) = 23 trikes, 5 bikes, and 28 seats.
You would multiply L×W×H to find the volume
L=length
W=witI
H=height
when solving sales tax it's pretty simple because all you do is add everything for a subtotal and multiply your sub total by the tax so i'll use the first as an example your subtotal is 19.96 x0.05 to get 0.99 <-- your sales tax and your final total with tax to be 20.96