To solve this problem you must apply the following proccedure:
1. You have a total of 21 coins, all nickels and dimes. Then:
x:nickels=5 cents
y: dimes=10 cents
x+y=21
2. You have that the total value is $1.70. Then:
5x+10y=170
3. The system of equation is:
x+y=21 (i)
5x+10y=170 (ii)
4. You have:
x+y=21
x=21-y
5(21-y)+10y=170
105-5y+10y=170
y=13 dimes
x+13=21
x=8 nickels
Answer:
you can do it bubu amp tanga
<h3>x = 1/2</h3>
Step-by-step explanation:
14x + 5 = 12
14x = 12 - 5
14x = 7
x = 7/14
x = 1/2
<h3>Hope it helps you!!</h3>
Xy + yx+ x - 3x - 3y
xy + yx + -2x + 3y
Answer:

Step-by-step explanation:
Given the expression: 
To complete the square, we follow these steps:
Step 1: Identify the coefficient of q
Coefficient of q=-23
Step 2: Divide the coefficient of q by 2

Step 3: Square your result from step 2 and add it to the equation
This gives us: 
We have now completed the square.
Step 4: Write the result as a binomial square.
To write it as a binomial square, pick the variable and add the term in the bracket.
Therefore:
