Answer:
x+y=28
70x+140y=3360
8 cats, 20 dogs were sold
Step-by-step explanation:
Let x=cats y=dogs
We know that a total of 28 pets were sold which means that
x+y=28
We also know that they made 3360 which means that
70x+140y=3360
It doesn't really say if you need to solve this but I will anyways
We use the first equation (x+y=28) and subtract 28 and y from both sides to get
x-28= -y we can then divide both sides by -1 so y can be a positive
-x+28=y
This is what y equals in terms of x and so we can plug this in for y in the second equation
70x+140(-x+28)=3360
Distribute the 140 and get
70x-140x+3920=3360
Add like terms and subtract 3920 to get
-70x=-560
divide both sides by -70 and get
x=8
We now know that 8 cats were sold and can plug this value into any equation to solve for y ( I will be using the first one because that's easiest)
8+y=28
subtract 8 and get
y=20
Answer:
7854.00
Step-by-step explanation:
It is pretty easy.
The value of n to the nearest whole number is 22
<h3>Trigonometry</h3>
From the question, we are to determine the value of n to the nearest whole number
In the diagram,
The given triangle is a right triangle.
Thus,
Using the <em>Pythagorean theorem</em>, we have that
n² = h² + k²
∴ n² = 9² + 20²
n² = 81 + 400
n² = 481
n = √481
n = 21.93
n ≈ 22
Hence, the value of n to the nearest whole number is 22
Learn more on Trigonometry here: brainly.com/question/21568111
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Answer:
The answer is 84000 milligrams
Step-by-step explanation:
The formula is to multiply the mass value by 1000
438+382
Add
Final Answer: 820