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## Biotechnology Graduate, former Homeschooling Parent

### Winter Park, FL (32792)

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# Regina's Responses in WyzAnt Answers

#### WHEN DO YOU NEED TO USE PEMDAS, DO YOU USE IT EVEN THROUGH YOU DON'T HAVE PARENTHESES OR EXPONENTS

I need help solving this problem

1+1+1+1+1+1+1+1+1+1-1+1+1+1+1+1*0

there are 10 ones infront  of the minus sign and 6 ones after the minus sign

also need to know if I need to use PEMDAS for every math problem even if it doesn't have parentheses

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Asked by Appiphynie from Oklahoma City, OK
00

No, you would only multiply the last 1 by zero, as you do multiplication first, by PEMDAS. Then, you would add  or subtract the remainder of the ones.

To answer the question, you would use PEMDAS to answer any math question, especially if there are no parentheses.

Here is the original:
1+1+1+1+1+1+1+1+1+1-1+1+1+1+1+1*0

Here, I add my own parentheses, according to PEMDAS:

(1+1+1+1+1+1+1+1+1+1)-1+ (1+ 1+1+1) +1*0

The last phrase = 0, and we evaluate it first, because it's multiplication, so:

(1+1+1+1+1+1+1+1+1+1)-1+ (1+ 1+1+1) + 0

The first phrase =  10, because we're just adding 10 ones together, so:

(10) - 1 + (1+ 1+1+1)

Now, adding the last phrase, since I put it in parentheses:

(10) - 1 + (4)

Now, combine the first two terms:

9 + 4

13

#### areas, circumferences and volume

A Susan B Anthony Dollar has a radius of 0.52 inches and a thickness of 0.0079 inches. Round the answers to the nearest ten thousandth:

a) circumference of the coin

b) area of one face of the coin

c)volume of the coin

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Asked by Diane from Pocatello, ID
00

I posted an answer, and I bet others have, as well, but mine keeps disappearing and reappearing. O.O

When I go to My Questions and Answers, this problem shows up, but not always does my answer.

How would I report this problem?

#### What are the appropriate H0 and Ha for each of the following research studies? In addition, note whether the hypothesis test is one- or two-tailed.

this is a reseach method  question

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Asked by Barb from Chattahoochee, FL
00

You must develop a hypothesis, but then, reverse it, also known as the "null hypothesis."

Ex.
H0: If I change the batteries in my flashlight, it will work.
Ha: If I change the batteries in my flashlight, it won't work.

Or, since the remainder of the question deals with probability:

H0: If I roll this die, it will land on one.
Ha: If I roll this die, it will not land on one.

So, you'll want to calculate your confidence interval and determine whether or not to include the null hypothesis data (how many times 3 did not come up) in the results. If you reject the null hypothesis results, the test is two-sided, or two-tailed (regarding the shape of the bell curve). http://www.itl.nist.gov/div898/handbook/prc/section2/prc221.htm

#### Describe the properties of the diagonals of a parallelogram.

How do you describe the properties of the diagonals of a parallelogram.

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Asked by Ashley from Apopka, FL
00

Opposite sides are congruent, opposite angles are congruent, and the consecutive angles are supplementary.

Read if you need more detail:

If this is a true parallelogram, both sets of opposite sides and angles must be equal. If one set is not equal, the lines will not be parallel. If you extend the lines through the sides, you can see the similarity between the points of intersection, in terms of the angles. Use straws, sticks, or strings to experiment with the lengths of the sides, to give you something real to prove it to yourself.

Edit:

I misread the question. I apologize.

Bill is right. If you draw lines through the parallelogram, from one corner to its opposite, then, connecting the other two opposite corners, you will create four triangles, as you do when playing with drawings of squares.

Similar to when you are able to cut a pie perfectly, you will end up with "slices" that are equal. However, in a parallelogram, two of your slices will be equal to each other, and the other two will be equal to each other, unless all four sides are equal in length, as in a square or rhombus where all of the "slices" will be the same.

Also, as Bill pointed out, the diagonal lines will be cut exactly in half by each other.

I like to draw these out on graph paper with a ruler, as well. Then, you can measure your lines, and see that your diagonals bisect each other.

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## Background Check Status for Regina G.

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