# Posts by tomas

Total # Posts: 123

**chem**

N2H4 is decomposed in a closed container according to this reaction: N2H4 ? N2 + 2H2 . If the temperature is constant and the initial pressure of N2H4 is 800mm, what will the pressure in millimeters be after the decomposition to N2 + 2H2? Im having trouble with this problem ...

**Algebra**

Thank you soo much!

**Algebra**

Maria worked 15 more overtime hours than Jordan one week. If Maria worked 8 overtime hours for every 5 overtime hours that Jordan worked, for how many hours of overtime did each person work?

**Math**

It is equivalent

**Physics**

Stephanie serves a volleyball from a height of 0.78 m and gives it a initial velocity of +6.6 m/s straight up. (1): How high will the volleyball go? The acceleration of gravity is 9.81 m/s^2. (2): How long will it take the ball to reach its maximum height? Answer in units of s

**Physics**

can you help me without the pic? please?..

**Physics**

A thin uniform rod has mass M = 0.5 kg and length L= 0.49 m. It has a pivot at one end and is at rest on a compressed spring as shown in (A). The rod is released from an angle θ1= 55.0o, and moves through its horizontal position at (B) and up to (C) where it stops with &#...

**Physics**

I really appreciate all your help, if I said anything that made it sounds disrespectful I am deeply apologizing.. Thank you very much for all your help.

**Physics**

the first one I know, can you help me with the others?..

**Physics**

M, a solid cylinder (M=2.35 kg, R=0.111 m) pivots on a thin, fixed, frictionless bearing. A string wrapped around the cylinder pulls downward with a force F which equals the weight of a 0.750 kg mass, i.e., F = 7.357 N. 1)Calculate the angular acceleration of the cylinder. The...

**math**

I like your answer and explain . step by step, now I understand how to do that.thank you, Jai

**math**

If x=(2/y^2)+2,what is the value of y in terms of x ? please answer and explain

**math**

a. 9 b. 12 c.102 d. 46,080 e. 138,240

**math**

Jennifer is setting the dinner table. She needs to set the table for 4 people, and each person needs to have an identical place setting to the other 3. She has 6 red place mats,6 green place mats, and 8 blue place mats as well as 4 maroon napkins, 3 orange napkins,5 beige ...

**math**

If #(a,b,c,d)means you subract the absolute value of d from the sum of a,b,and c,then #(2,5,6,-10)+#(1,2,3,7)= a. 2 b. 4 c. 16 d. 22 e. 36 please answer and explain

**math**

If m#= m/m^2-m ,what is the value of 6#-[(-5)#]? a. 1/30 b. 1/20 c. 1/4 d. 11/30 e. 9/20 please answer and explain

**math**

A relay with n laps was run by 4 people. The first runner ran half the laps. The second runner ran half the amount of laps the first runner ran. The third runner ran half the amount of laps the second runner ran. The remaining laps were completed by the fourth runner. How many...

**math**

Scott, Mike, and Holly shared an order of French fries. Scott ate x fries. Mike ate one more than twice the amount of fries that Scott ate. Holly ate 5 fewer fries than Scott did. If there were 6 fries left, how many fries were in the order? a. x-5 b. x c. 2x+`1 d. 4x-4 e. 4x+...

**math**

There are x students in Mrs. Schwartz's third-grade class. One less than half the students have blue eyes. Six fewer children have green eyes than have blue eyes. The rest of the students have brown eyes. How many students have brown eyes? a. 7 b. 8 c. (x/2)-7 d. x-7 e. x-...

**math**

The notation ##(a,b,c)produces a number that is a less than the product of b and c raised to the a power. When ##(2,5,x)=23, what is the value of x? a. 0 b. 1/2 c. 1 d. 2 e. 5 please answer and explain

**math**

The number a is a number less than -3. What is the range of possibl values of 1/a^2 ? a. 1/a^2 <-9 b. 1/a^2 <-3 c. -1/9<1/a^2<1/9 d. 0<1/a^2<1/9 e. 1/9<1/a^2<1/3 please answer and explain

**math**

Which of the following is equivalent to the inequality 7>-3x>-12? a. -7<x<12 b. 7/3 <x<4 c. -7/3<x<4 d. -4<x<-7/3 e. -4<x<7 please answer and explain

**math help**

3ab=6 ab =2 a =2/b answer b

**math help**

If 3ab=6, what is the value of a in terms of b? a. 2 b. 2/b c. 2b^2 d. 2b e. 2b^2 My answer is d, but not sure, anyone can tell me right or wrong? 3ab=6 3a=6b a=2b

**math**

A bag contains x marbles. Half of the marbles are blue. Four less than the number of blue marbles are red. The remaining marbles are purple. What is the probability of choosing a purple marble at random? a. 2 b. 4 c. 1/2-(x/2-4)/x d. x/2-4 e. x/2 please answer and explain

**math**

so, the teacher give me the wrong answer? my answer is right

**math**

Y is divided by 6, the remainder is 4, so I think 6x6+4=40 , so y=40 40-6/3 =34/3 remainder=1

**math**

When y is divided by 6, the remainder is 4. What will be the remainder if y-6 is divided by 3 ? a. 0 b. 1 c. 2 d. 3 e. 4 my answer is b. 1 , but teacher give me the answer is d. 3 , I don't understand, anyone can explain

**math**

Stacey is x years old. Ali is four years less than three times Stacey's age. Carli is 10 years more than twice Ali's age. What is the age difference between Stacey and Carli? a. 2x+6 b. 3x-4 c. 3x+6 d. 5x+2 e. 6x+2 please answer and explain

**math**

d, right

**math**

If n is an integer, which of the following must be odd? a. 3n-5 b. 3n+4 c. 4n+10 d. 4n-5 e. 5n+7 please answer and explain

**math help**

If x people working together make a total of y dollars after an hour of work, how much money will z people make if they work 4 hours at the same rate per person ? a. 4xyz b. xy + 4z c. 4yz/x d. 4xy/z e. xyz/4 please answer and explain

**math**

wrong, the answer is a

**math**

The answer is d, right ?

**math**

Which set of numbers has a greatest common factor of 1 ? a. 2,3,and 6 b. 2,200, and 400 c. 3,9,and 27 d. 22,33,and 99 e. 100,500, and 2,500 please answer and explain

**math**

I understand so, #2 how to multiple of both numbers

**math**

#1 how to divide both mumbers

**math**

1. What is the greatest common factor of: 2x2x5x7x7 2x5x5x7x7 a. 2x5 b. 2x5x7 c. 2x5x7x7 d. 2x2x5x5x7x7 e. 2x2x2x5x5x5x7x7x7x7 2. What is the least common multiple of: 3x3x5x5x5x7 2x3x5x5x7x7 a. 2 b. 5x5x7 c. 3x3x5x5x5x7 d. 2x3x3x5x5x5x7x7 e. 2x3x3x3x5x5x5x5x5x7x7x7 Please ...

**math help**

thank you

**math help**

5x+10y +15z-15x+10y-5z+5x-10y-5z / (5x+10y+15z)-(15x+10y-5z)+(5x-10y-5z) a. 1/3 b. 1 c. x+2y+z / x-2y+3z d. x-2y-z / x+2y-3z e. x-2y-z / x+2y+z my answer is none of above, is - 1/3, I didn't know I done it wrong or the question is not correct

**math help**

(2np.3r/4r)-(2np-3n)=? a. -1/2np+3n b. -1/2np-3n c. -np/2r+3n d. 1/2np+3n e. 1/2np-3n Please answer and explan

**math**

(x^2 + x) / 4(x-3x)

**math**

(x^2 + x) / x-3x .4=? mean x 4

**math**

(x^2 + x) / x-3x (4) = ? Please answer and explain

**math**

(x^2 + x) / x-3x . 4 =

**math**

(3x / x) ( 2x / 6) =

**math**

thank you, Reiny

**math**

= 1/2 (4x +12x +12x^2) = 1/2 ( 16x + 12x^2 ) = 8x + 6x^2 is it correct answer ?

**math**

last question 1/2[4x+6x(2+2x)]= ?

**math**

thank you, Reiny

**math**

y+y^2+(y+y)^2= ? a. y^2 + 5y b. 2y^2 + y c. 3y^2 + y d. 5y^2 + y e. 4y^4 + y^2 + y please answer and explain

**math**

yes,4xy(1/(2y) + 3/(2x) ) thank you

**math**

4xy(1/2y+3/2x)= ? a. 2x + 6y b. 2x + 12y c. 4x + 6y d. 4x + 12y e. 4x - 12y please answer and explain

**math**

A television set listed at $160 is offered at a 12 1/2% discount during a store wide sale. If an additional 3% is allowed on the net price for payment in cash, how much can Josh save by buying this set during the sale for cash ?

**math help**

A gear with 20 teeth revolving at 200 revolutions per minute is meshed with a second gear turning at 250 revolutions per minute. How many teeth does this gear have ?

**math**

Two boys weighing 60 pounds and 80 pounds balance a seesaw. How many feet from the fulcrum must the heavier boy sit if the lighter boy is 8 feet from the fulcrum ?

**maths**

my answer is A

**maths**

How much money is saved by buying an article priced at $80 with a 40% discount,rather than buying an article marked at $90 with discounts of 35% and 10% ? A. $ 4.65 B. $1.50 C. $10.50 D. $3.15 E. $4.25 not just answer

**maths**

oh, I get it now, thank you

**maths**

the decimal answer is 0.1666666

**maths**

The enrollment of Kennedy High School dropped from 1200 to 1000 over a three-year period. What the percent of decrease during this time? A. 20 B 16 2/3 C. 25 D. 200 E. 2 My answer is 1200-1000=200 200/1200= 1/6 ( some wrong )

**maths**

A pulley revolving at 200 revolutions per minute has a diameter of 15 inches. It is belted to a second pulley which revolves at 150 revolutions per minute. Find the diameter, in inches, of the second pulley. not just answer, please

**maths**

so, the answer is 50?

**maths**

my answer is 1/2 (same ) But the answer they give me is A. 66 2/3 B. 75 C. 50 D. 33 1/3 E. 25

**maths**

At Baker High, 3 out of every 4 graduates go on to college . Of these 2 out of every 3 graduate from college. What percent of students graduating from Baker High will graduate from college ?

**maths**

152*0.625=95 95-50=45

**maths**

A baseball team won 50 of the first 92 games played in a season. If the season consists of 152 games, how many more game must the team win to finish the season winning 62 1/2% of games played?

**math help**

thank you

**math help**

I think 1+3+5+7+9+11+13+15+17+19+21+23+25+27=196 answer:196/14=14 but I am not sure

**math help**

Find the average of the first 14 positive odd integers.

**math help**

thank you, I understand now.

**math help**

The average of 2P, 3Q, and another number is S. Represent the third number in terms of P,Q,and S. A. S-2P-3Q B. S-2P+3Q C. 3S-2P+3Q D. 3S-2P-3Q E. S+2P-3Q not just answer,please

**math**

A gear with 60 teeth is meshed to a gear with 40 teeth. If the larger gear revolves at 20 revolutions per minute, how many revolutions does the smaller gear make in a minute? not just an answer please (A)13 1/3 (B)3 (C)300 (D)120 (E)30

**math**

There are fewer than 33 eggs in a basket. If they are counted out 6 at a time, there are 4 left over. If they are counted out 5 at a time, there are 3 left. How many eggs are in the basket? not just an answer

**math**

oh made a mistake it is 44

**math**

3/8

**math**

The raisins in a bag weigh 9/16 of pound. If the raisins are divided into 6 equal shares, how much will 4 shares weigh? not just the answer

**math help**

How many different two- digit numbers can be formed using each of the digits 3, 5, and 7 only once ?

**math help**

I know if four digit using the digit 3,5,7,and 9 , the answer is 4*3*2*1=24, but if three digit using the digit 3, 5,7, and 9, the answer is 3*2*1=6?

**math help**

If digits cannot be repeated,how many three digit numbers can be made using the digits 3, 5, 7 and 9 ?

**math help**

if the digits 1,3,5.7,9, what is the different

**math help**

How many 5-digit odd numbers can be made using the digits 3, 5, 6, 7 and 9, if digits cannot be repeated?

**math help**

If m/n = 5/6, then what is 3m + 2n ? (A) 0 (B) 2 (C) 7 (D) 10 (E) it cannot be determined from the information given not just answer

**math help**

answer B

**math help**

50%

**math help**

In an audience of adults and children, 1/6 of the audience are young boys and 1/3 are young girls. What percentage of the audience are children ? (A) 66 2/3 (B) 50 (C) 40 (D) 37 1/2 (E) 33 1/3 not just answer

**math help**

i understand now, thank you

**math help**

i still not understand what is 2 feet from 6 ft to 24 ft.

**math help**

11, 16.5, 22

**math help**

i mean E

**math help**

A Certain type of board is sold only in length of multiples of 2 feet from 6 ft to 24 ft. A builder needs a large quantity of this type of board in 5 1/2 foot lengths for minimum waste. The lengths in feet to be ordered should be (A) 6 (B) 12 (C) 16 (D) 18 (E) 22 (F) 24 not ...

**math help**

I understand now, thank you

**math help**

why 1.38*2.5 what is 2.5 comefrom

**math help**

d. $0.45

**math help**

The total saving in purchasing 30 13-cent lollipops for a class party at a reduced rate of $1.38 per dozen is: (A) $0.35 (B) $0.38 (C) $0.40 (D) $0.45 (E) $0.50 (F) $0.55 not just answer

**maths**

The price of mangoes ranges from 25 cents to 75 cents a piece. What is the greatest number of mangoes that can be bought with $3 ?

**maths**

x exceeds y by the same amount that 7 exceeds 2. If y is 16, what is the value of x ? (A) 18 (B) 19 (C) 20 (D) 21 (E) 23 [ not only answer ]

**math help**

S is the sum of n integers and A is their average. Which of the following statements is correct? (A) S=A+n (B) S=nA (C) A=nS (D) N=AS (E) None of these

**math**

x is a positive integer and x-5 is negative. what is the greatest possibel value of x ?

**Math**

47.11