# Posts by MAry

Total # Posts: 3,831

MATH
Please help, I´m having trouble with that. I have done it in some diffrent ways and it kept telling me is wrong.

MATH
Find the average rate of change of f(x)=2x2−7 between each of the pairs of points below. Between (3,11) and (6,65) Between (b,m) and (s,u) Between (x, f(x)) and (x+h, f(x+h))

maths

Algebra
Yazmin decided to get some exercise by taking the stairs from the first to the fifth floor in her apartment building. The first time she went up the entire flight, she walked up some steps and ran up 16 steps. This took a total of 60 seconds. The second time she went up the ...

Algebra
y = total cost You start at a cost of \$50 at zero days, so \$50 is your y-intercept (b). Your rate of daily rental is your slope (m), and it goes up at \$150 / 1 day. Therefore, for y=mx+b, you would write y = \$150x + \$50, where x>or = 0

chemistry
give products of HgCl2 + KSO4

chemestry
a compound salt Xcl2 contains 203% chloride what is element x?

ctu
Stuart’s car loan reached a maturity value of \$14001.00 after 3 years. Find the rate on Stuart’s loan if the principal he borrowed was \$12474.00 Use the formula to find the interest; then use to find the rate in decimal form. Leave your answer in percentage form ...

Chemistry
Dry air has a density of 1.29g/L (at 25 degrees celsius and 1 atm of pressure). How many liters would 500.g of this air occupy?

precalc
thank you so much!

precalc
i typed in exactly that equation into the calculator 10cos(2π/3)(17.2-.3)+50 and yes my calculator is in radian mode

precalc
y=10cos(2π/3)(x-.3)+50 x=17.2 i plugged this into the calculator and i got -34.5, but the answer is 43.3 how do i get that answer?

pre-calculus
Almonds cost fiver per pound and cashews cost nine per pound. How many pounds of almonds should be mixed with the cashews to make 10 pounds of a mix that sells for eight dollars per pound?

question
You purchased 8 pounds 10 ounces of candy from a candy shop. You want to split it equally among 3 classrooms at a local school.

algebra
not sure

algebra
linearfunction that represents total week pay ears \$200 plus 5% commission on sales what will need to wake to equal 475 dollar a week

Macroeconomics
As an example of a price index, consider the A.C.D.P.I. (a fictitious price index). The associated basket of goods is: Good Price Coffee \$8/lb. Bread \$1/loaf Tea \$15/lb. Aspirin \$2/bottle Cola \$6/case A. If the price of coffee doubles, what is the resulting percentage change ...

Math
Thank you so much Damon!!

Math
Z/2=2(11^2)-(3×7)

Math
14+3=18 18 dived by 3=51

English
"When you touch another person's life, the gift keeps on multiplying." Please help me interpret this quote because I don't understand it very much.

math
I have the same question but it asks for you to explain. How do I explain why Luanne is closer?

Math
idk

Math
A blueprints scale of 1 cm=5m. what are the dimensions of a function room that measures 9cm by 7cm on the blueprint?

Math
The greatest place value is hundred thousand. The digit in the tens place is 5.the remaining digit ate 2, 3, 8 and 7. One of the digit has a value of 30,000. One of the digit had a value of 800. The value of the digit in the thousands place is 10 times greater than this. There...

math
give the reason to justify each step a. 4c+3(2+c)=4c+6+3c b. =4c+3c+6 c. =(4c+3c)+6 d. =(4+3)c+6 e =7c+6

English
I have seen Ms Sue comment on the same question saying she agrees with the answers, yet she is agreeing with 2 different answers, so obviously one is wrong??

Math
The greatest place value is hundred thousands. *the digit in the tens place is 5. *the remaining digit are 2,3,8, and 7 *one of the digit has value of 300,000 *one of the digits has a value of 800. The value of the digit in the thousands place is 10 times greater than this. * ...

statistics and probability
Solve for y . -2(y-3)= 5y-29 Simplify your answer as much as possible

Physics
Suppose you wanted to be able to see astronauts on the moon. What is the smallest diameter of the objective lens required to resolve a 0.61 m object on the moon?

Physics
Which one of the following actions would make the maxima in the interference pattern from a grating move closer together? Decreasing the frequency of the laser. Increasing the frequency of the laser. Increasing the number of lines per length. Increasing the wavelength of the ...

algebra
: a student scored 73 out of 100 on a test. If the maximum score on the next text is also 100 points, what score does the student need to maintain an average of 81?

Algebra
True or False. If a line L1 has equation y = mx + b, where m and b are constants with m ‚ 0,then an equation of a line L2 perpendicular to L1 has the form , where C is a constant. L2: y= -1x +C

math
Sam bought a new car for \$26,500. The car depreciates approximately 13% of its value each year. a) What is the decay factor for the value of this car? b) Write an equation to model the decay value of this car?

english
that sounds good !

Physics
Thanks

Physics
A solid cylinder rolls down an incline plane without slipping. If the center of mass of the cylinder has a linear acceleration of 2.67 m/s2, what is the angle of the incline to the horizontal?

physics
1.93m

physics
a. 2.12 m b. 2.07 m c. 1.98 m d. 2.20 m e. 1.93 m which one ?

physics
A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 43.0-kg child sits on the other end. The beam balances when a fulcrum is placed below the beam a distance of 1.10 m from the 30.0-kg child. How long is the beam?

Physics
Never mind I got it

Physics
A child (48 kg) stands on the edge of a stationary merry-go-round (uniform disk of radius 1.2 m and mass 50 kg). The child jumps off at 1.0 m/s with respect to the ground in the direction tangential to the edge. Find the angular speed of the merry-go-round after the jump. ...

math
list all the 3-digit number that fit these clues

physics
Suppose you moved a box across a rough horizontal surface with a 50 N force over a displacement of 10 m. If the frictional force at the interface was 10 N, how much work was done to the box?

statistics
A study of 600 college students taking statistics revealed that 54 students received the grade of A. Typically 10% of the class gets an A. The difference between this gourp of students and the expected value is not significant at the 0.05 level. What does this mean?

Math (Need help Urgent)
1. Fireworks are to be launched from a platform at the base of a hill. Using the top of the platform as the origin and taking some measurements, it was determined that the cross-section of the slope of one side of the hill is y=4x-12 . If the path of the fireworks is y= -x^2+...

Math
Nuts worth \$3 per lb are to be mixed with 8 lb of nuts worth \$4.25 per lb to obtain a mixture that will be sold for \$4 per lb. How many pounds of the \$3 nuts should be used?

MATH
A 95% confidence interval for the mean of a normal population is found to be 17.6 <h 23.6 (h looking symbol couldn't find on keyboard ) what is the margin of error ? A 2 B 2.7 C 3 D 4 My answer is C. Am I right? But I think it could also be A.

social studies
i know

social studies
what is that Bobpursley i was told not to trust wikipedia

social studies
thxs

social studies
What is unusual about how Brazil gained independence? Need Help A.S.A.P

physics
The effective speed of the student while going upstream (i.e , the velocity of the student with respect to the river ) is 0.75 m/s whereas the same while returning downstream is 1.45 m/s . So , total time taken = 1000/0.75 + 1000/1.45 = 2023 seconds = 33 minutes 43 seconds . ...

Social Studies
thxs

Statistics
Thank you!

Statistics
12.34 Screening job applicants. A company retains a psychologist to assess whether job applicants are suited for assembly-line work. The psychologist classifies applicants as one of A (well suited), B (marginal), or C (not suited). The company is concerned about the event D ...

math
Half of Sarah's wire is equal to 2/5 of Daniels. Chris has 3 times as much as Sarah. In all, their wire measures 6 ft. How long is Sarah's wire in feet?

algebra
given the following functions, find the function values of g(x)=5, find g(-4)

Math
Sharon made a scale drawing of a triangular park. The coordinates for the vertices of the park are: (– 10, 5) (15, 5) (10, 12) Her scale is 1 unit = 1 meter. What is the area of the triangular park in square meters? How do you find the answer?

life orientation assignment
Analse the above statement . illustrate your answer by referring to any three media form over the same two week period

statistics
suppose i guess that the average income of a family is \$40,000. Display a test of the hypothesis that the mean of the numerical variable equals the value of the guess given versus the alternative that it does not equal this value. then what would be my decision at the 5% ...

D. photosynthetic cyanobacteria and fungi form a mutualistic associatio in lichen

Linear Functions
\$5500

algebra
where does the 1 come from the 1.14? I have my final today.

algebra
An advertisement for a steel-belted radial tire states that this tire delivers 14% better gas mileage. If the present gas mileage is 25.5 mpg, what mileage would you expect if you purchased these tires? Round your answer to the nearest tenth of a mile per gallon. I know the ...

Algebra
Ms Sue, can you write it out, I'm really bad at this. Thanks.

Algebra
Suppose you wish to make a scale drawing of your living room, which measures 18 ft by 23 ft. If the shorter side of the drawing is 6 in., how long is the longer side of the scale drawing?

science
What is the difference between specific heat and heat capacity? If you heat 500g of H2O initially at 8C in a 1000 W microwave with 80% efficiency for 2 minutes, what will the final temperature be?

math
3x3−27x2+60x

PHYSICS
A particle (mass = 5.0 g, charge = 40 mC) moves in a region of space where the electric field is uniform and is given by Ex = 2.5 N/C, Ey = Ez = 0. If the velocity of the particle at t = 0 is given by vy = 50 m/s, vx = vz = 0, what is the speed of the particle at t = 2.0 s?

chemistry
A sample of potassium hydrogen oxalate, KHC2O4, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH solution. Calculate the molarity of the NaOH solution.

integral
3xdx/√(4+x) need help!!!!

statistics
assume that the odor threshold for untrained noses is normal with a standard deviation of 7. the odor thresholds for these 10 noses are: 31, 31, 43, 36, 23, 34, 32, 30, 20 and 24. is there evidence that the mean threshold for untrained tasters is greater than 25 micrograms per...

statistics
would the null hypothesis that the 2000 mean hourly earnings of all workers was \$16 be rejected at the 10% significance level in favor of the two-sided alternative? What about the null hypothesis that the mean was \$15?

Research Question for English
thank you !

Research Question for English
How does a person inherit intelligence from someone else?

English Research
What are some things you can inherit from your parents?

Math
Jill bought so e carrots and apples for \$24.80. A carrot and an apple cost \$.90 altogether. She bought more carrots than apples. The cost of the extra number of carrots was \$6.80. How many apples did she buy?

non profit Accounting
The mayor of a large city approaches a group of citizens and suggests that they form an organization to provide social, educational, and recreational programs for local youth. The group agrees and forms an entity called the Community Youth Organization (CYO). The group also ...

statistics
A consumer advocacy group claims that the mean amount of juice in a 16 ounce bottled drink is not 16 ounces, as stated by the bottler. Determine the conclusion of the hypothesis test assuming that the results of the sampling lead to rejection of the null hypothesis. A. ...

statistics
A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain neighborhood. She desires a margin of error of \$30. Past studies suggest that a population standard deviation of \$248 is reasonable. Estimate the minimum sample size ...

geometry
with 2 pentagons (A, B, C, D, E) & F, G, H, I, J.) start with A in lower left corner. Same with F. AE=10, BC=8: FG=9, FJ=15. There are diagonal line CE & HJ. x= AB, Y=GH. Find the scale factor of ABCDE to FGHIJ; need value of x & y; perimeter of ABCDE is 38, what is perimeter ...

geometry
a forest ranger spots a fire from 28-foot tower. the angle of depression from the tower to the fire is 11 degre to the nearest foot, how far is the fire from the base of the tower

science
Thanks for the help

civic education
1. The right to private and family life is limited by the law regulating marriage under traditional customs, which recognise parental consent and age restriction on who is of marriageable age. 2. Right to is restricted by the law which forbids a citizen from killing himself or...

math
square root of (24)(72)

math
square 0f (24)(72)

math
nevermind, forgot to square it, figured it out

math
the world's largest cube puzzle in Knoxville measures 6 feet on each side. The scale factor between a standard cube puzzle and largest is 1/24. Find the surface area and volume of the standard cube puzzle. Answer is 0.375ft^2/0.015625ft^3 Not sure how they figured it out i...

math
If x unit of a product cost C dollars to manufacture and earn revenue of R dollars, the value of X where the expression for C and R are equal is called break-even quantity, the number of units that produce zero profit. Find the break-even quantity when c=14X+48000 and R=18X

math
20

Algebra 2
Consider 2 dice being rolled together. Calculate the probability of rolling an even sum

math
3\8

Thank you Anon!!

math(Discrete)
Determine whether the statement ∀x ∈ Z, ∃y, z ∈ Z[x = 5y + 7z] is true or false. Explain.

chemistry
4.6

Managerial Accounting
Joanna Pauly was delighted to see that her ROI ﬁgures had increased for the third straight year. She was sure that her campaign to lower costs and use machinery more efﬁciently (en- abling her factories to sell several older machines) was the reason why. Joanna ...

lifes orientation
To what extent can intrapersonal conflict affect choice of a career

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