Answer:
n = -2 or n = 10
Step-by-step explanation:
n^2 - 8n - 20 = 0
Answer: his weekly allowance is $8
The model to solve the problem is
X/2+8=12
Step-by-step explanation:
To get Eduardo's weekly allowance
Say it is x
Now he spent half of x on clothes and earns extra $8 more to end up with $12
Therefore
x/2+8=12
x/2=12-8
x/2=4
x=8
Answer:
So here is the answer.
We represent h = hardwood and p = pine bark
Here is the equation: h + p = 176
2.75p + 3.50h = 520
Next, p = 176 -h (substitute)
2.75 (176-h) + 3.5h = 520
484 -2.75h + 3.5h = 520
3.5h-2.75h = 520 -484
0.75h = 36 (divide both by 0.75)
h = 48
Therefore, the number of hardwood sold is 48.
h + p = 176
p = 176-48
p= 128
The number of pine bark sold is 128.
Hope this helps :)
Step-by-step explanation:
Answer: It will still measure the same at 30 degrees.
Step-by-step explanation:
A rotation just changes orientation, not size or measure
Answer:
201, 500ft²
Step-by-step explanation:
The formula for calculating area in this case is;
<em>A = w × l</em>
This means we're going to take the width of the runway (65ft) and multiply it by the length of the runway (3100ft).
(To make it easier on paper, you can swap the two numbers around, so the higher number is on top, and the smaller number is on the bottom - 3100 × 65. It won't change the answer, but it will make it quicker and easier to get to the result, and lessens the chances making a mistake.)
So the equation you need to do is;
<em>3,100 × 65 = 201, 500.</em>
Add on the units, and there's your answer;
201, 600ft²
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Hope this helped!</h2>
