# Posts by PsyDAG

Total # Posts: 23,393

**Statistics and Probability**

Z = (score-mean)/SEm SEm = SD/?n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for the Z score.

**word problems**

646 = 16 + 7d/11 Subtract 16 from both sides, then multiply both sides by 11/7.

**MATH 2**

(15+10)/2 = ?

**math**

6/7 divided by 3 = 2/7

**math**

S = 2J S - 12 = J + 12 Substitute 2J for S in the second equation and solve for J. Insert that value into the first equation to solve for S. Check by putting both values into the second equation. Add the two.

**Math 120**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. For deaths, approx. 1/4 * 1/4 = ? For getting heart disease (292,188/total female population in US)^2 = ?

**Math (?)**

What is the question?

**math (?)**

Need info on "mr skoh".

**Statistics**

IQFr1 = IQFr2 IQFr1 > IQFr2 You decide one the tail.

**math**

.3 meters represent 150,000 meters 1:500,000

**maths**

a) (1-1/3)(1/4) = 2/3*1/4 = 1/6 b) 48/3 = 16 48/6 = 8 48 - 16 - 8 = ?

**Biology**

Also, they are attracted to carbon dioxide, which is exhaled.

**Biology**

If so, possibly because it is not covered and does not move as much as the hands.

**Math**

2:55?

**Science**

Storage tank

**Math**

This time, subtract the first equation from the second.

**Math**

Add the two equations to get this: 5X = 10 That gives you X, then insert value into either equation to get Y.

**Language Arts 8B**

Welcome

**Language Arts 8B**

1B, 3C

**Math**

-?(x^2) = -x

**Math**

Assuming both winds are the same velocity. 210 -170 = 40, therefore wind is 20mph Therefore plane's unhindred speed would be 210-20 or 170+2 = 190mph

**Math**

Distance = rate * time 400 = (160-40) * time 400 = (160+40) * time Calculate times and compare.

**Math**

Looks like all of them are true.

**science**

To have the sound travel back and forth, it must be 2*340m.

**Science**

Density = mass(kg)/volume (cubic meters) Density of water = 1 Convert measures to solve.

**Math**

Unless you got embarrassed and spit them out, you still have 2 balls in your mouth. Is there any data you omitted?

**Biology**

Although I can't find any data to support this, it might be "cell".

**math**

It would help if you proofread your questions before you posted them. With all the typos, I am not sure what you are asking.

**Science**

Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.

**science**

be a liquid?

**Satistics**

Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = ?(SEmean1^2 + SEmean2^2) SEm = SD/?n If only one SD is provided, you can use just that to determine SEdiff. Find table in the back of your statistics text labeled something like "areas under ...

**Relative Clauses and Pronouns**

Not sure what you question is. Be more specific.

**math**

Let n stand for number of bus rides. 1.50n ? 36 Solve for n.

**Statistics**

a) Z = (score-mean)/SD Look in the back of your statistics textbook for a table called something like “area under normal distribution” to find the proportion/probability related to the Z score. b, c) Z = (score-mean)/SEm SEm = SD/?n Use same table. I'll leave the...

**Statistics**

Z = (score-mean)/SD Look in the back of your statistics textbook for a table called something like “area under normal distribution” to find the proportions/probabilities (.045 and .05) and their Z scores. Insert data into equation above to solve for scores.

**math**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 5/10 * (5-1)/(10-1) = ?

**Science @ MS SUE !**

Welcome, MR SUE

**Science @ MS SUE !**

They are infinite rather than finite. There is less pollution. Sorry that I am not MS SUE.

**Math**

7/8 foot

**MATH HELPP!!!**

If there is a vertical line at the X value of 7, that means that the input is constant for all outputs. However, in terms of the real world this does not seem likely. Perhaps your description of the graph is not completely accurate.

**Math - Ratio's**

Blue balls = 2:7 = 200/700 = 200 Blue to red = 4:3 = 200:x, red = 150 total - red - blue = yellow

**Math**

Agree

**Math**

We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though. However, I will do one problem to start you out. 9x + 2 = 38 Solve for x.

**statistics**

It looks like you have repeated the list of scores. 30 32 33 34 37 37 40 42 43 48 49 50 50 52 57 59 60 61 63 65 67 71 72 74 Q3 = 75th percentile = 62

**math**

3/5 * 1,000,000 = ? (1-3/5) * 50,000 = ?

**science**

The sides and/or bottom could support the body, causing it to displace less water.

**Geometry (?)**

What do all the dollar signs ($) signify?

**Science**

Lunar eclipse occurs when the earth comes between the sun and moon. The solar eclipse occurs when the moon comes between a portion of the earth and the sun. Solar eclipses happen more often. https://www.timeanddate.com/eclipse/solar-eclipse-frequency.html

**Math**

Cannot understand your version of stem and leaf plot.

**5th grade math**

I assume Rachel wants to have some cupcakes too. Number of cupcakes in the box/6 = ?

**math**

4 drops.

**Math**

Pop. = all roadrunners born Sample = Lubbock roadrunners Pop. = all cars traveling route Sample = those going 75 kph

**Math**

.5 hectare = 5000 m^2 x * 12.5 = 5,000 Solve for x.

**Geometry (?)**

What kind of figure?

**Maths**

What is TSA? Don't use acronyms instead of full terms.

**Science (?)**

No image. Cannot copy and paste here.

**Statistics**

.24 * 20 = ?

**Math**

81 and 18

**math (?)**

No diagram or alternatives. Cannot copy and paste here.

**Math**

Amb is right. 20*20 = area of one side. there are 6 sides to a cube.

**Math**

D = 3S (D+10)+(S+10) + (42+10) = 100 Substitute 3S for D in the second equation and solve for S. Insert that value into the first equation to solve for D. Check by putting both values into the second equation.

**Science**

Cannot draw plots on these posts.

**Math (?)**

No drawing. Cannot copy and paste here.

**math**

Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See previous post.

**math**

I assume you mean 1 cm = 20,000 miles. 20,000/1 = x/5 Solve for x.

**maths**

50 - 35 = 15 15/3 = 5 1:2 = 5:10

**Math**

Circumference = 2?r Circumference/2? = r Volume = ? r^2 h 1 ft^3 = 28.32 liters

**Math**

Are you talking about measure of central tendency and variability? Measures of central tendency (mean, mode, median) are measures that can stand for the whole distribution of scores. Measures of variability indicate how much scores are spread out from the measure(s) of central...

**math 1**

28.50/6 = x/10 Multiply both sides by 10, then divide the left side by 6.

**math (?)**

Have no idea of where these segments are. Cannot copy and paste here.

**Statistics**

No cell phone = 293/2253 = ? Cell not smart = 924/2253 = ? Smartphone = (458+437+141)/2253 = ? Divide and multiply by 100 for percentage.

**Statistics**

Look in the back of your statistics textbook for a table called something like “area under normal distribution” to find the proportion/probability in larger portion of Z = .5. Multiply by 100.

**Math**

Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.

**Math**

J = B + 15 J + 8 = 2(B+8) Substitute B+15 for J in the second equation and solve for B. Insert that value into the first equation to solve for J. Check by putting both values into the second equation.

**English**

Sounds possible, but how will you support this thesis?

**Maths**

a Liter = 1000 ml 200/8000

**Maths**

(5*24)/20 = ?

**Statistics**

It would help if you proofread your questions before you posted them. I assume you are using "5" instead of "=". Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = ?(SEmean1^2 + SEmean2^2) SEm = SD/?n If only one SD is provided, ...

**Alegbra**

When multiplying/dividing, exponents are added/subtracted respectively. (3^2)(3^3) = 3^5 = 3*3*3*3*3 = ?

**Alegbra**

Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.

**psychology**

What are your choices? at the back of the eye? consisting of rods and cones?

**Math (?)**

No plot. Cannot copy and paste here.

**statistics**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .5 * B = .28 Solve for B.

**statistics**

(7+1)/10 = ?

**Math**

Cannot sketch on these posts.

**math**

Right

**math**

5/20 = x/40 To solve for x, multiply both sides by 40, then divide the left side by 20.

**Pre- algebra help please anyone**

Welcome

**Pre- algebra help please anyone**

Online "^" is used to indicate an exponent, e.g., x^2 = x squared. When multiplying/dividing, exponents are added/subtracted respectively. x^9/x^2 = x^7

**math 6th grade**

Cannot post a plot here. Also, what is your question?

**Algebra**

It would help if you proofread your questions before you posted them. If a "camera takes two pictures in each rotation cycle," it will take 50 cycles to take 100 pictures.

**Algebra 1 Polynomials**

A includes B and C.

**Algebra 1 Polynomials**

From my examples, A is correct.

**Math**

2a(b+3+6bc)

**Math**

Reiny is right. I apologize for a double goof.

**Math (Ooops)**

Forgot that each lemon gives 2 tablespoons. 72/2 = 36 lemons 36 * $.33 = $11.88

**Math**

16 tablespoons = 1 cup using 4.5 cups = 72 tablespoons 72 * $.33 = $23.76

**Math**

Process: 2(3x+5) + 2(5x-2) = 6x + 10 + 10x - 4 = 16x+6

**Math**

4O + 6G = 2.62 7O + 5G = 2.66 Multiply first equation by 5 and second by 6. 20O + 30G = 13.10 42O + 30G = 15.96 Subtract first equation from second. 22O = 2.86 O = .13 Take it from there.

**math**

Online "^" is used to indicate an exponent, e.g., x^2 = x squared. (9-2)^2 + (7-10)/5 = 49 - 3/5 = 49 - .6 = 48.4 If it is: (9-2)^2 + 7 - 10/5 = 49 + 7 - 2 = 54