Answer:
The number of nickel coins is 10 and the number of quarter coins is 5
Step-by-step explanation:
<u><em>The correct question is</em></u>
Mary has 15 coins with the total value of $1.75 if the coins are nickels and quarters how many of each kind are there
Let
x ----> the number of nickel coins
y ----> the number of quarter coins
Remember that
we know that
Mary has 15 coins
so
-----> equation A
The total value of the coins is $1.75
so
----> equation B
Solve the system by graphing
Remember that the solution is the intersection point both graphs
using a graphing tool
The solution is the point (10,5)
therefore
The number of nickel coins is 10 and the number of quarter coins is 5
Answer:
x=12
Step-by-step explanation:
first we simp. 18:x=x:8 to x^2=18*8. In which case it is x^2=144 x=12
You first do the equation in the parenthesis, Then, do all else using PEMDAS
Answer:
price of a computer that she could afford R 9230.769
Step-by-step explanation:
Given data
amount pay = R500 per month = 500 × 24 = R 12000 total pay
time period =24 months = 24 /12 = 2 years
rate = 15 % per annum
to find out
price of a computer that she could afford
Solution
we know formula
Amount Paid = Principal × (1+(RT/100))
put value principal pay and R and T and we get
principal = Amount / (1+(RT/100))
principal = 1200 / (1+(15 ×2 )/100))
principal = 9230.769
price of a computer that she could afford R 9230.769
