# Posts by luis

Total # Posts: 302

Math
Estimate the value of 51 to the nearest whole number

Social Studies/ History
a fight between u.s. government and the american indians thad started the second seminole war

math
Tanishas mother buys 38 lemons. they know it takes 8 lemons to make 80 ounces of leomonade. Does Tanisha need more lemons? If not, how many extra lemons does she have? if so, how many more lemons does she need? explain how you found your anwser. she needs 448 ounces for the ...

math
Tanishas mom and the Lemon question. can some show how they got 7 lemons as the answer. Thank you luis

Math
A wall in Marcus's bedroom is 8 1/3 feet high and 16 1/5 feet long. If he paints 1/3 of the wall blue, how many square feet will be blue?

math
how do you get the answer for the Lemons. I know it's 7 more lemons. thank you

math
What is the slope of the line that contains the points (4, –4) and (7, –6)?

Chemistry
A solution of acetic acid, 1.0 mol L–1 CH3COOH, contains sodium acetate, NaCH3COO. The percent ionization of the above solution is 0.25%. The Ka for acetic acid is 1.8 x 10–5. Which of the following is the concentration of NaCH3COO in acetic acid? So i use ...

math
342

Math
You can also do 3x5x1 or any way because you will get the same answer.

Math
Multiply 5 and 3 and the answer to that multiply by 1

Math
That's a hint.

Math
I know that b and c are wrong because they are both division.if x is the total then you would subtract y or z from x. Since we are looking for z we have to subtract y from x. So which one has y being subtracted from x and equaling z.

algebra
Ok sorry that was my brother who put that🤗

algebra
The answer is the opposite of positive eleven

Physics
❓❔❓❔

Math
It's making it bigger or smaller so the size would change the volume

Science
I think the answer is d

Science
That helped a lot

Science
Thank you

Science
Christina has a glass of water. Michael has a fruit juice drink. Both drinks are at room temperature, and both students add ice to their drink's. Condensation begins to on the outside of Christina's glass before Michael's. How can they state their observations as ...

History
I think it's a But it's note or c because they are the same answer but rewritten.

math
The third letter of the alphabet

Science
Christina has a glass of water. Michael has a fruit juice drink. Both drinks are at room temperature, and both students add ice to their drink's. Condensation begins to on the outside of Christina's glass before Michael's. How can they state their observations as a...

Algebra
Don't know Sorry

Math
3.4

Science
Christina has a glass of water. Michael has a fruit juice drink. Both drinks are at room temperature, and both students add ice to their drink's. Condensation begins to on the outside of Christina's glass before Michael's. How can they state their observations as a...

Math
Oh

Math
How many numbers are there in pie?

Geometry
Beats me

Biology
A protein is the whole structure put together.

Chemistry
what mass of NaCl do you need to make a 500mL of a 0.10M solution?

math
a three digit number with 8 ones and 4 tens. The sum of all my digits is 20. What number am i?

algebra
Find the value of y foe the given value of x and z Y=z+x

Math
5x-2y=4 X+2y=8

math
Which correctly renames 2/3 and 1/2 using a common denominator??

physics
A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 83.0-kg water-skier has an initial speed of 5.9 m/s. Later, the speed increases to 11.4 m/s. Determine the work done by the net external force ...

Physics
A baggage handler throws a 16.0 kg suitcase horizontally along the floor of an airplane luggage compartment with an initial speed of 1.10 m/s . The suitcase slides 2.10 m before stopping.

Math
Use similar triangle to solve. A person who is 6 feet tall standing 140 feet from the base of a tree and the tree casts a 150 foot shadow. The person's shadow is 10 feet in length. What is the height of the tree?

chemistry
Which is the correct expression for Keq when the chemical reaction is as follows: N2 + 3H2 2NH3.

words problems
a car rental offers two plans-plan a \$20per day and 12 cents per mile -plan b -\$65 per day free unlimited mileage

Math

chemistry
onsider the following reaction between sulfur trioxide and water: SO3(g)+H2O(l)→H2SO4(aq) A chemist allows 61.5 g of SO3 and 11.2 g of H2O to react. When the reaction is finished, the chemist collects 59.3 g of H2SO4.

math
The truck is 5m

Physics
A sports car skids to a stop, leaving skid marks 290 m long. If the coefficient of kinetic friction between tires and pavement is 0.80, how fast was the car going before the skid?

math complex number
Solve (-2+i) / (3-2i) and my answer is (-8-i) / 13. Correct?

Geometry
Can I please get some help? by+2/3=c, for y

Science
The lesion is located in the right thorax just lateral to the mid-saggital plane

Algebra
When 2 parents and 3 children visit a theme park the admission cost is \$57. The cost is \$33 for 1 parent and 2 children. Find the cost for 1 adult and the cost for 1 child?

math
kate and alan sell stereos. last month kate sold 24 more stereos than alan. together they sold 164. How many stereos did allan sell?

Stats
A professor believes that all Thursday sections are cursed and will always score lower on tests compared to Monday sections. To tests this he collects samples of test scores from these two sections. For Monday's section, the mean test score was 60, the estimated population...

Math
My 10th grade teacher gave us geometry homework and this problem has me stumped for sure. This rhombus has three interior angles: (5x-2)°, (8y+2)°, and (3x+22)° . We are supposed to find the value of x and y. I tried to use an equation by assigning the fourth angle...

Statistics
In a nominal data set, what is the preferred measure of central tendency?

math
a bicycle with a diameter of 24 inches is pedaled at a speed of 70 rotations per minute. find the distance the bike will travel in 48 mins

physics
A football is thrown with an initial upward velocity component of 13.5m/s and a horizontal velocity component of 16.5m/s How much time is required for the football to reach the highest point in its trajectory? How high does it get above the ground?How much time after it is ...

Statistics
A population has u=100 and o=20. If you select a single score from this population, on average, how close would it be to the population mean? Explain your answer. I don't understand the question itself. Please help.

Math
The following set of numbers respresents the average weekly scores of 9 preschoolers on a verbal aggression scale. 19.1, 18.9, 33.5, 18.7, 28.1, 31.5, 20.3, 30.1, 17.9 Consider this to be the entire population of scores. What is the standard deviation? I already have the mean ...

fundamental skills
When a teacher chooses learning objectives for a child, which question should be asked? A. What should Kelly learn next? B. Where's Kelly in the learning process? C. Do the plan and materials fit my lesson? D. Has Kelly learned what was taught? c.

fundamental concepts
Free play, eating a snack, painting, hearing a story, and so forth are related to which of the following learning concepts? A. Space B. Classification C. Size D. Time a.

fundamental skills
An 18-month-old child putting large beads in a plastic bowl and pouring them out is A. developmentally superior. B. normal and appropriate. C. developmentally inferior. D. abnormal. my answer I think is a.

fundamental skills
What must a teacher provide for an open-ended question to be successful? A. Heuristics B. Background information C. Discrepant events D. Disequilibrium my answer I think is b

physics
A warehouse worker pushes a crate along the floor, as shown in the figure (Figure 1) , by a force of 9.0N that points downward at an angle of 45∘ below the horizontal. Q1 Find the horizontal component of the push Q2 Find the vertical component of the push.

Math
Thank you so much! I had already asked this question before but they never explained to me how they got the 198. I really appreciate.

Math
A classroom of n = 10 children has a mean score of 17.200 on a measure of hyperactivity. One new child is added to the class, and the mean hyperactivity score for the resulting classroom including all the children is 18.000. Find the value of the new child's hyperactivity ...

Stats
How did you get 198?

Stats
A classroom of n = 10 children has a mean score of 17.200 on a measure of hyperactivity. One new child is added to the class, and the mean hyperactivity score for the resulting classroom including all the children is 18.000. Find the value of the new child's hyperactivity ...

Math
Ah, thank you. I really appreciate it. (:

Math
So my mistake was I didn't use enough digits after the decimal place?

Math
A pill weighs 70 mg. 7/9 of the pill is the active ingredient. How many milligrams are in the part of the pill that is not the active ingredient? So if 7/9 is active that means 2/9 is not active. I did 2 divided by 9 which gives me .22 I then multiplied 70 by .22 which gives ...

Managemnet
How to prepare an EFAS table for United Technologies.

Fund. concepts skills
Which of the following activities emphasizes the concept of comparing? A. Dividing pigs and cows into two separate groups B. Dividing farm and wild animals into two separate groups C. Discussing similarities and differences between stuffed and real animals D. Matching animals ...

Fundamental concepts skills
Putting objects together in a group based on a common criterion such as color or shape is called A. the same name. B. classification. C. lookalikes. D. match-ups. my answer is b.

english - Compare and Contrast
I would appreciate it if someone would be willing to look over my essay real quick. I just would like to know if I made any critical errors. Please do not correct them just point them out so I can fix it. Thank you very much. General instructions from my teacher: If you quote ...

chemistry
A 27.00mL sample of an H2SO4 solution of unknown concentration is titrated with a 0.1422M KOH solution. A volume of 40.22mL of KOH was required to reach the equivalence point. What is the concentration of the unknown H2SO4 solution? Any help would be greatly appreciated. (:

chemistry
Magnesium has three naturally occurring isotopes: Mg-24 with mass 24.3050 amu and a natural abundance of 78.99 %, Mg-25 with mass 24.9858 amu and a natural abundance of 10.00 %, and Mg-26 with mass 25.9826 amu and a natural abundance of 11.01 %. Calculate the atomic mass of ...

chemistry
Calculate the freezing point of a water solution at each concentration. 1.40m? What are the steps to calculate this?

chemistry
What is the molarity of ZnCl2(aq) that forms when 18.0g of zinc completely reacts with CuCl2(aq) according to the following reaction? (Assume a final volume of 165mL .) Zn(s)+CuCl2(aq)→ZnCl2(aq)+Cu(s)

chemistry
V1= 38.8 n1= 1.60*10^-3 V2= 49.9 n2= ? How do we solve for n2 using avogadro's law?

chemistry
Yes, that is true but in my notes the professor never gave us a formula to figure it out. It is asking for an exact number of collisions.

chemistry
Imagine that you have an ideal gas in a 8.00L container, and that 2850 molecules of this gas collide with a square-inch area of the container at any given instant. If the volume is increased to 56.0L at constant temperature, how many collisions will occur per square inch of ...

Chemistry
Ho w much  water  would  you  need  to  add  to  500 mL  of  a  0.3 M  calcium  nitrate  solution  to  make the  solution  0.1 M? A. ...

chemistry
Calculate the theoretical yield of alum if 0.200g of Aluminum was reacted with excess KOH and H2SO4? I don't even know how to start it. Please help. Also I wanted to say thank you for the help I've gotten from this website it has helped me a lot. I feel like I'm ...

chemistry
It's asking for it in nanoseconds is there a change in the formula?

chemistry
How long does it take light to travel each of the following distances 2462 mi, the distance between Los Angeles and New York. How do we calculate how fast light travels?

chemistry
Can you show me how you finished the equation?

chemistry
Complete and balance each of the following equations. K2SO4(aq)+BaBr2(aq)→ Would it be K2SO4(aq)+BaBr2(aq)→K2Br2 +SO4Ba? Express your answer as a chemical equation. Enter no reaction if no precipitate is formed. (How can we know if a solid is formed in the product?)

Personal Finance (Math)
Becka borrowed \$100 from her cousin at the rate of 6% per year. If the inflation rate was 2% that year, what is her cousin's actual rate of return on the loan? How do you work this out?

chemistry
A 4.78-g sample of aluminum completely reacts with oxygen to form 6.67 g of aluminum oxide Use this data to calculate the mass percent composition of aluminum in aluminum oxide. (Sorry need help with this!)

Chemisty
How many grams of Cl are in 38.0g of CF2Cl2? I really want to figure out how to do it. I can't seem to understand any of this Chem homework and it's getting me frustrated, please help!

If your trying to find another way to find 8+5 i could show you how..... First:add 5+3=8 and if you dont get it here is anote Second: 3+2 or 4+1 wich all =5 And the Last one i did =8 beacuse 5+3=8... My thing:this is how to get 5 or 8 And its like for kidergarten or 1st grade

math
A Norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window is 16.200 ft. give the area A of the window in square feet when the width is 3.000 ft.

Physics, Math
A typical volume of a modern hot air balloon is 2500 cubic metres, and a typical maximum temperature of the hot air is 120 degrees Celsius. Given these figures, and an outside air temperature and density of 15 ∘C and 1.225 kg/m3 respectively, compute the maximum mass (in...

Physics
A red ball is thrown down with an initial speed of 1 m/s from a height of 27 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 24.5 m/s, from a height of 0.7 meters above the ground. The force of ...

algebra
The following equation is used to find c, the total cost for printing a quantity of high school yearbooks, b. c=5b+200

Physics
June stands on the roof of the house which is 22.8 m high and she throws the ball at an initial speed of 4.90 m/s downward at Ben who is 1.80m tall. a) With what speed does she hit her target's head and b) how much time was it in the air? Displacement= 21 m. -Place ...

Physics
Frank is traveling the posted speed limit of 36 mi/hr in a school zone. A deer darts out between two cars. He instantly hits the brakes and the car decelerates at a rate of 5.0 m/s^2. a) how much stopping distance will he require in (meters)? b) If he was going twice the ...

math last set up
To secure a 618 meter radio tower against high winds, guy wires are attached to a ring 10 meters from the top of the tower. Each wire is anchored 90 meters from the base of the tower. Find the measure of the angle the wire makes with the ground. Round your answer to the ...

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