# 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.

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.

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

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

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