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Anna007 [38]
3 years ago
6

What is the mathematical expression for the sum of 2 times 2 and 5 times 6

Mathematics
1 answer:
expeople1 [14]3 years ago
7 0
2x2=4, 5x6=30
Not sure if they’re one expression, of so it’s (2x2)+(5x6)=34
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Prove sin^2A + cos^2A = 1
Nady [450]

Step-by-step explanation:

{sin}^{2} A +  {cos}^{2} A  = 1 \\ lhs =  {sin}^{2} A +  {cos}^{2} A  \\  =  {sin}^{2} A +  1 - {sin}^{2} A  \\  = 1 \\  = rhs \\  \therefore \:  {sin}^{2} A +  {cos}^{2} A  = 1 \\

8 0
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3 0
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A professor grades students on four tests, a term paper, and a final examination. Each test counts as 15% of the course grade. T
alina1380 [7]

Answer:

The Alans's average for the course is 84.5

Step-by-step explanation:

We are given

There are 4 tests, A Term paper and a Final examination.

Score = 92, 78, 82, 90.

Term paper score = 80

Final examination score = 86

Weighted mean = ∑ w.f/∑w

     also the sum of all the weights is 100% = 1

weighted mean = 15%*92 + 15%*78+15%*82+15%*90+20%*80+20%*86/1

                         = 51.3 + 33.2

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Therefore the Alans's average for the course is 84.5

5 0
3 years ago
At a store, a hat has a regular price of a dollars. During a sale, the price of that hat is discounted by 20%.The expression 0.8
OlgaM077 [116]

Answer:

Question?

Is the wording: price of "a" dollars, (in italics)?

If so, the equation would be:

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Otherwise, if "x" represents the regular price, then the equation would be:

0.8x

Step-by-step explanation:

8 0
3 years ago
PLEASE HELP ASAP!!!!!!
ioda
The answer is 2.54 feet
5 0
4 years ago
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