02/06/15

Three students were to be chosen from 8 candidates to be school prefects.
Three students were to be chosen from 8 candidates to be school prefects. Lauren calculated-correctly-  that it's possible to choose 3 people from 8 in 56 ways. Which of the following statements... more
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02/06/15

How many numbers could it be?
I left my glasses at home so I couldn't quite see the number on the board. The first digit was a 7 and the last was a 4, but I couldn't make out the middle numbers. It was certainly a 4 digit... more
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02/06/15

Two girls are practising their arithmetic. They take two different numbers.
Two girls are practising their arithmetic. They take two different numbers. The first girl finds half the sum of the numbers and divides her answer by 3. The second girl, multiplies the sum of the... more
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02/06/15

Set up the system of equations and solve using either the substitution method or elimination method.
Dianna has $27,000 to invest. An investment advisor tells her to put part of her money in a bond fund at 5% interest and the rest in a stock fund earning 7.5% interest. Dianna would like to earn... more
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02/05/15

What will be the cost
Crown molding is to be installed in a 13-foot-wide by 30-foot-long living room. The subcontractor charges $3per foot to install the molding. What will be the cost for the room
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02/05/15

Exponential functions
The profit of an organization is calculated by the function            P(x) = x2 - 4000x + 7800000, where x is the Number of units sold. if the net profit is 3800000, find the number of items sold.
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02/05/15

Hi. I was wondering if you could help me with a quick algebra 1 question? The y-intercept of -5x-2y=-20.
I only need to know the y-intercept.
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02/05/15

How do I do this...?
I'm in 9th grade, in honors geometry. My teacher tried to explain how to find the scale factor with the center's coordinates and the original point's coordinates, but I don't understand! He said... more
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02/05/15

Identify the limiting reactant and excess reactant if 40g of copper is added to a solution with 300 g of silver nitrate.
Need help answering the 3 questions!!! *Also determine the mass of the silver metal that could be formed  as a result of the reaction and determine the mass of the excess reactant that would... more
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02/05/15

what percent of 85 is 22.95
hi im asking this questin in favor of my math teacher  
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02/05/15

what is 1/8 to the eighth power written as a negative exponent without using negative 1
I don't understand it it
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02/05/15

If 80.0 ml of .375 M AgNo3 mixed with 93.5 mL og .550 M of Na2Co3, what mass of silver carbonate precipitate would form?
Need help finding the mass of silver carbonate that would form. 
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02/05/15

Dale grove 420 miles using 18 gallons of gas. At this rate, how many gallons of gas would he need to drive 357 miles
Dale grove 420 miles using 18 gallons of gas.  At this rate, how many gallons of gas would he need to drive 357 miles.
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02/05/15

Systems of equations help.
Solution x is 20% alcohol and solution y is 80% alcohol. How much of each should be used to make 100 / of a 50% solution? 
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02/05/15

What is the speed of the all falling?
A ball is dropped from the top of a 81-m-high building. What speed does the ball have in falling 3.8 s?= ? m/s
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02/05/15

Joe Cool drives to see his girlfriend who attends another college....... Find the km/h.
Joe Cool drives to see his girlfriend who attends another college. (a) The 140. km trip takes 2.0 h. What was the average speed for the trip? = ? km/h(b) The return trip over the same route takes... more
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02/05/15

What is the sprinter's average acceleration??
A sprinter starting from rest on a straight and level track is able to achieve a speed of 13 m/s in a time of 6.1 s. What is the sprinter's average acceleration?   = ? m/s2 
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02/05/15

WRITE AN INEQUALITY
Zasha spent $6 on packages of gum. How many more packages of gum that cost $1.20 each can she buy if she has a $20 bill? Write an inequality to represent the situation.
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02/05/15

Help #3 Volume of a cone: Exact answers in terms of pi
Find the volume of a cone with a base radius of 4ft and a height of 9ft. Write the exact volume in terms of pi , and be sure to include the correct unit in your answer.
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02/05/15

WRITE AN INEQUALITY
Louie has 20 more thanhalf as many beaseball cards as Gerardo. Together they hav at least 350 cards. Write an inequality to represent the situation.
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02/05/15

data analysis
There are three games left in the regular season. Frank wants to improve his average assists per game to 6.  How many assists would he need to have in his last three games in order to reach his... more
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02/05/15

write a function g representing the area of the square as a function of the radius of the circle r.
A piece of rope that is 20feet long is cut into two pieces. One piece is used to form a circle and the other used to form a square. Write a function frepresenting the area of the circle as a... more
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02/05/15

Value of Constant when continuous?
For what value of the constant c is the function f continuous on ( -inifity , infitiy ) where    f(x) = {x^2-c     if x ξ (-infinity, 9)           {cx+7      if x ξ [9, infinity)   c= ????
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02/05/15

a physician wants one third of a piece of tape that is 15 5/6 inches long. how many inches does the physician want?
It's just  a question and i want the answer.
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02/05/15

What value must be chosen for a in order to make this function continuous at -3?
The function f  is given by the formula:    f(x)= (6x^3+18x^2+9x+27)/(x+3) when x < -3   and by the formula: f(x) = 5x^2+6x+a when -3 ≤ x   What value must be chosen for a in order to... more
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