Answer: 2x2 - 6x - 11
Step-by-step explanation:
1. Evaluate
2. Collect like terms and calculate
3. Reorder the terms
Answer:
2x2-6x-11 ( the second two is above the x)
To find what the number is, we need to set up proportional fractions.
Currently, we have 8% of a number is 20.
To set up our fractions, put 100% under 8% as a fraction first.
It should look like this: 8/100 (hint: per-cent means per-hundred).
Now, we have 20 out of a number, x. This is because we are claiming that 20 is 8% of a number (if we just reword the question without changing the concept).
It should look like this: 20/x.
Our proportional fractions are:
20/x = 8/100.
To solve for this, we need to cross-multiply the denominator of 8/100 (bottom number, 100) with the numerator of 20/x (top number, 20).
This product equation should look like this:
20 x 100 (when simplified, we get 2000).
Now, we need to cross multiply the numerator of 8/100 (top number, 8) with the denominator of 20/x (bottom number, x).
This product equation should look like this:
8x.
Now that we've cross-multiplied, set our two products as an equation.
8x = 2000.
To solve for x, divide both sides by 8 (remember, what you do to one side of an equation, you must do it to the other).
8x / 8 = x
2000 / 8 = 250.
x = 250
Your final answer is:
8% of 250 is 20.
I hope this helps!
Answer:
I would answer this question, however there is no picture in order for me to tell.
Step-by-step explanation:
:(
400d=p
All you have to do is multiply 400 pounds by however many days you need to figure out. For example, if you wanted to find how many pounds an Arian elephant eats in 4 days, you would multiply 400*4=p. 400*4=1,600 pounds. Hope this helps :)
Answer:
E. 0.6872
Step-by-step explanation:
An appropriate calculator or Z-table is needed for answering questions like this. My calculator tells me the area is ...
0.687267787 ≈ 0.6873
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The web app shown in the attachment gives the same 4-digit value.
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If you look up the area values in a table, you might find ...
p(z < -1.2) = 0.1151
p(z < 0.85) = 0.8023
Then the difference is ...
p(-1.2 < z < 0.85) = 0.8023 -0.1151 = 0.6872
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Note that the least significant digit of the difference between rounded numbers often cannot be trusted to be accurate--as in this case.
