Donna sold 3 pencils and 8 pens solved using simultaneous equation
What is a simultaneous equation?
Simultaneous equation refers to related equations that are solved at the same to derive answers to the unknown variables
Let assume that X pencils were sold and Y pens were sold
The total revenue is the sum of the prices multiplied by the quantities sold.
2X+3Y=30 (equation 1)
The sum of X and Y sold is 11
X+Y=11 (equation 2)
multiply the second equation by 2
2*(X+Y=11)
2X+2Y=22 (equation 3)
subtract equation 3 from 1
(2X+3Y=30)-(2X+2Y=22)
Y=8
Substitute for Y in equation 2
X+8=11
X=11-8
X=3
Which means he sold 3 pencils and 8 pens.
Find details on simultaneous equation in the link below:
brainly.com/question/20627346
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We have 89 ounces of 47% iodine.
We will add "x" ounces of 14% iodine to get a 29% iodine solution.
89 * .47 + .14x = .29 * (89 + x)
41.83 + .14x = 25.81 + .29x
16.02 = .15x
x = 106.80
So, we must add 106.80 ounces of 14% iodine to get a 29% iodine solution.
(for a total of 195.80 ounces)
Source:
http://www.1728.org/mixture.htm
Answer:
your answer is incorrect. The correct answer is 
and 
.
Step-by-step explanation:
If a quadratic function is 
and a>0, then minimum value of the function at point 
.
The given function is
Here, a=1, b=b and c=182. So.
Put 
in the given function to find the minimum value of the function.
We know that minimum value is 13. So,
Taking square root on both sides.
The value of b is 26.
So, the given function is
Now, add and subtract square of half of coefficient of x.
On comparing with 
, we get
Therefore, your answer is incorrect.
Answer:
the answer is y=3x+9 if you are looking for it to be in slope intercept form
23 10/100 is how you would write it
