Answer:
0.45 = 9/20
0.88 = 22/25
Step-by-step explanation:
11x+55=0
11x=-55
11x/11=-55/11
x=-5
4.50 is the total value.
Explanation:
Let d = number of dimes and n = number of nickels.
If the number of dimes is 4 times the number of nickels, then:
d = 4n
Since ""Joey has 10 nickels**,
n = 10
To evaluate the number of dimes, substitute n = 10 into,
d = 4n
d = 4(10)
d = 40 dimes
We set up an equation to reflect the monetary values as follows,
.10d + .05n = "total value"
Substitute d = 40 and Joey's n=10 nickels into the equation.
.10(40) + .05(10) = 4.00 + 0.50 = $4.50 is the total value.
2x + 3/12 = 2x/8
2x - 2x/8 = -3/12
2x - x/4 = -3/12; 2 - 1/4 = 1 3/4 = 7/4
7x/4 = -3/12
7x = -3/12 * 4
7x = -1
x = -1/7
A quadratic equation is an equation that includes a squared term. For example, 3x + 7 = 28 is not a quadratic equation as it only has x, whereas x^2 + 5x + 6 = 0 is a quadratic equation as it includes x^2. Quadratic equations also usually have two solutions, whereas linear equations (like my first example) only have one.
I hope this helps! Let me know if you would like me to explain anything more :)