Answer:
x = 15 ounces
Step-by-step explanation:
A mixture is made with two types of solutions.
Solution A - 45 ounces of 10% saline solution
Solution B - x ounces of 70% saline solution
Resulting mixture - (x + 45) ounces of 25% saline solution
To get the value of x, equation will be,
(45 × 0.10) + (x × 0.70) = (x + 45) × 0.25
4.5 + 0.70x = 0.25x + 11.25
0.25x - 0.70x = 4.5 - 11.25
-0.45x = -6.75
x = 
x = 15 ounces
If you want to solve for L instead of A, you must divide the area by the width instead.
It would look like this: A = LW
LW = A
LW/W = A/W
L = A/W
Answer:
D) 7
Step-by-step explanation:
Five times a number=5x
added to 4= 5x+4
So, the number is 7.
Answer:
A.) $56
Step-by-step explanation:
1. Convert 7% into the numerical version by either
A. Moving the decimal two spaces to the right, giving us .07
or
B. Making 7% into a fraction, 7/100
2. Now make an equation with the total amount of money (M) multiplied by the interest (P) inside of parenthesis. This will give us 7% of $800 in your case.
(800 × .07) → 56
3. Then, multiply by the number of years the interest has been accumulated.
56 × 1
The official equation for this is: a = p(1 + r)^t
a = amount at end (initial amount + interest gained)
p = initial amount
r = rate (percent interest)
t = time in years
Answer:
x = -3
Step-by-step explanation:
2x + y = -2
4x + y = -8
2x + y = - 2
y = -2x - 2
4x + y = - 8
y = -4x - 8
y = -2x - 2
y = -4x - 8
-2x - 2 = -4x - 8
4x - 2x = 2 - 8
2x = -6
2x/2 = -6/2
x = -3
To check just use da graph ;w;
The x is -3
