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Grade 10 math homework help please?
19. Neil sets the price in the Hardware To Go store. His research shows that an increase of 10 cents in the price of a package of batteries causes a drop in sales of 10 packages per day. The stores normally sell 600 packages of batteries per day, at $4.95 per package. a) what is the maximum revenue Neil can expect on the sale of batteries? b) How many packages of batteries must be sold to generate the maximum revenue. c) What is the optimum pricing strategy in this model? THANKS SO MUCH !
Grade 10 math homework help!?
I have a few questions I am really stuck on. 1) If a and b are integers, find values of a and b such that a^2 - b^2 is 21. 2) The area of a square is represented by the expression 49-28x+4x^2 , where x represents a positive integer. What are the possible values for the perimeter of the square. 3) Facotr: a. 4x^2+12xy+9y^2-4z^2 b. x^4-2x^2y+y^2-z^2 I really need these answered ASAP! Thanks!
Hello, can someone help me with my Grade 10 math homework?
a) Determine the midpoint of AB ( I did. I got ( -1, 2 ) Correct. b) Determine the equation of the right bisector of AB Slope of AB = 1/2 Slope of the right bisector of AB = -2 y = -2(x + 1) + 2 y = -2x c) Show that the origin, ( 0, 0 ) lies on the right bisector of AB. 0 = -2*0 0 = 0 d) Determine the equation of the circle passing through AB. Do you mean the circle with AB as a diameter? (x - 2)^2 + (y + 1)^2 = (5 - 2)^2 + (5 + 1)^2 x^2 - 4x + 4 + y^2 + 2y + 1 = 9 + 36 x^2 + y^2 - 4x + 2y - 40 = 0
I need help on this 6th grade math homework problem regarding percent bars and basketball players. Can somebody help me?
On B, there are 10 bars, so the marked bars are at 1/10, 2/10, 3/10, ... , 9/10So the question is, what is 1/10 of 371, and what is 1/10 of 725? When you divide by 10, you can just move the decimal place once to the left. 1/10 of 371 is 37.1, and 1/10 of 725 is 72.5.So the bars for Yao ming should just be you counting by 37.1:0, 37.1, 74,2, 111.3, 148.4, 185.5, 222.6, 259.7, 296.8, 333.9, 371He hit 301 free throws, so that's just past 296.8 (the 80% bar). You color all those boxes, plus a little further. So we estimate Mao makes about 81% of free throws (give or take.)On the bars for Shaquille O' Neil you should count by 72.5:0, 72.5, 145, 217.5, 290, 362.5, 435, 507.5, 580, 652.5, 725451 is beyond the 435 mark (60%) so I'd call it 63%. Shaq made about 63% of his free throws.Compare these to the %s you got in part A.On C, I'm not 100% sure I know what it's asking, but here's what I'm assuming. You need to remember that Will used 4 bars, and Alisha used 10 bars. Either the benchmarks they are asking about are fractions or percents.Will is using 25% or 1/4 benchmarks.Alisha is using 10% of 1/10 benchmarks.On D, it looks like you have a little freedom, so I can really only tell you what I'd do personally.15 is divisible by 5, so I'd use benchmarks of 1/5 or 20% for Angela (20% is 1/5 of 100.) This comes out to 3.0, 3, 6, 9, 12, 15This means Angela hits 4/5 or 80% of her free throws.20 is divisible by 5 as well. (20% comes out to 4.)0, 4, 8, 12, 16, 2015 is under 16, so Emily makes slightly less than 80% of her free throws. (Not important, but it's actually 3/4.)16 is divisible by 4, so I'd try 25% first. 25% of 16 is 4.0, 4, 8, 12, 1613 is over 12 so they shoot over 75%. Unfortunately so does Angela, so we need a better answer. Let's try dividing by 5 like Angela. 16/5 is 3.2.0, 3.2, 6.4, 9.6, 12.8, 1613 is over 12.8, so Cristina makes over 80% of her free throws.Cristina is the best free throw shooter, because she is the only one who makes over 80% of her free throws.I think the idea of this problem is to let the student experiment with using the method. If you could guide him/her without actually telling him/her how to divide it up, that would be ideal.On E (D #2), you just need to know that percents represent part of a whole, and so do fractions. Ratios can do that too, though that isn't always what they're doing. 4/5, 80%, and 4:5 are all ways of expressing the idea that 4 out of every 5 will have a certain outcome.Best of luck.
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Math help grade 10 pleaze?
invested $8000 x=part at 9% per annum y=part at 4% per annum intrrest earned= $420. How much did she invest at each rate? x=amount at 9% y=amount at 4% y=8000-x ; this is need -- some way the y and x are related. 9%(x)+4%(y) = 420 .09(x)+.04(y) = 420 .09(x)+.04(8000-x) = 420; sub 8000-x for y .09(x)+.04*8000-.04x = 420 .09(x)+320-.04x =420; .09x-.04x+320=420; just reaarranged term to show what gets added together. .05x+320-320=420-320; sub tract 320 both sides .05x=100 .05x*20=100*20 ; 05*20=1 give whole x x=2000 y=8000-2000=6000 Check you answer .04*6000=240 .09*2000=180 ------------- .........420 check !!!!!! ======================================...
Grade 10 Method of Elimination homework?
Jill invested $2000, part at 12%/a and the other part at 8%/a. At the end of one year the amount from each investment were equal. How much was invested at teach rate? The answer is (1200, 800), but how? So far I've got... "Let x be amount invested at 12% Let y be amount invested at 8% Equation 1: x+y=2000 Equation 2: .12x = .08 y"
[Homework help - GR.10 Math] Solving problems using quadratic equations?
A diver bounces off a 3-m springboard at an initial upward speed of 4 m/s. Create a quadratic model for the height of the diver above the water. I Need help finding the answer, but I have no idea where to start or how.