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Let the cost of 1 apple=A
Bill bought=5A apples
Mary bought=2A + 1.86
5A=2A + 1.86
3A=1.86 divide both sides by 3
A=1.86/3
A=.62 cents- cost of 1 apple

All real numbers.

Domain asks what values you can plug in to your independent variable (In standard example, "x", in this case, "n") to produce a value result. So if the answer is "Does not exist", "Undefined" or some variety of that nature then the plug in is not in the domain.

Any number, whether it's 0, negative, positive, fractions, or decimals can be an exponent of a number and will give you a numerical answer. So any "Real number".

This morning:

     James had  x  dollars

     Brother had  2x  dollars (so James had half as much as his brother)

     Sister had  x + 27 dollars (so James had 27 dollars less than his sister).

His brother paid  12  dollars to James; now James has  x + 12  dollars.

His brother paid  12  dollars to his sister; now his sister has  x + 27 + 12  =  x + 39  dollars.

After paying  12  dollars to both James and his sister, his brother now has  2x - 12 - 12  =  2x - 24  dollars.

James sister now has twice as much money as his brother:  sister  =  2 x brother     --->   x + 39  =  2(2x - 24)

     --->     x + 39  =  4x - 48

     --->     39 + 48  =  4x - x

     --->     87  =  3x

     --->     x  =  29

James now has $29.00 + $12,00  =  $41.00. 

How many square ft in 107.21 area

"Area" is always measured in square "units", i.e., feet, inches, meters.....etc.

Now, your area of 107.21 is already in some square units. If this area was a perfect square, then you would take its square root to find the length of each side. Or, sqrt(107.21)=10.35 feet? on each side.

To calculate compound interest simply calculate the interest percentage and mutiply that by the initial sum. After you have done this take the result of this problem and mutiply it by the percentage rate. Repeat these step for the number of terms listed and you will have the final compound interest.

This depends on how many points were awarded per question and if any of the question were weighted. If each question was worth an equal amount of five points you would have 12 questions correct and 8 questions incorrect.

arccos (0.728) = about 43.28°

Moving the decimal to the right.........makes the power on 10 more negative

Example :      .13    =  .13 x 10⁰   =  1.3 x 10^-1

Example: 1234567890. Suppose I want to turn it into scientific notation. Start counting from the right until you get to last digit "1", which you DO NOT include in your count. If you did that, you should get 9 numbers. Then you put the decimal point at the end of the last digit you counted, which was 2 like this: 1.234567890. Now, the 9 digits you counted to the right of decimal point become power of 10 like this: 1.234567890 x 10^9. Now, by convention, only 2 decimal places are kept, especially for very large numbers, like this: 1.23 x 10^9.

And that is your scintific notation.

\([(660\times5625)\times2]+[(1185\times5625)\times3]+[(1450\times5625)\times2]+[(875\times5625)\times2]\)

\(660\times5625\times2+1185\times5625\times3+1450\times5625\times2+875\times5625\times2\)

\(3172500\times2+1185\times5625\times3+1450\times5625\times2+875\times5625\times2\)

\(7425000+1185\times5625\times3+1450\times5625\times2+875\times5625\times2\)

\(7425000+6665625\times3+1450\times5625\times2+875\times5625\times2\)

\(7425000+19996875+1450\times5625\times2+875\times5625\times2\)

\(7425000+19996875+8156250\times2+875\times5625\times2\)

\(7425000+19996875+16312500+875\times5625\times2\)

\(7425000+19996875+16312500+4921875\times2\)

\(7425000+19996875+16312500+9843750\)

\(27421875+16312500+9843750\)

\(43734375+9843750\)

\(53578125\)

Thanks for the help!

 cot=1/tan.

The domain is all REAL numbers!.

Did you forget something in your question?

If the $2.36 that Peter paid was the 15% tip for the total cost of the meal, then it means:

$2.36 / .15 =$15.73  cost of the meal. However, he had $5 coupons, so the net cost to him was $15.73 + $2.36 - $5.00=$13.09.

You use sine if you have the angle and you are looking for a side.

You use inverse sine when you need to find the angle.

You are implying that each question was worth 5 points. If that is the case, then you answered correctly 60/5=12 questions. So, therefore, you missed 20 - 12 =8 questions. Because 8 x 5 =40 points + 60 points that you got=100 pts.

what is the difference between sin x and sin^-1(x)?

Sin^-1(x) is the exact inverse of sin(x). It is called arcsine of x. Example: sin(x)=1/2. What is sin^-1 or the arcsine of x? If you use a calculator, you will see that the arcsine of x, or of 1/2 in this case, is 30 degrees.

IDK what 64+64

The LCM of 24 and 70 is 840. So, 840 seconds/ 60 seconds=14 minutes-when they will make the sound simultaneously.

Just so everyone knows Mathbitch is my alternate account and I am on much more often with my main.