test 13 Tmsca march 2

[lrp]

I had trouble doing these I believe I got them wrong maybe you all could help.
#7 in how many ways can twelve coins be divided into four piles, so that 2 coins are in the first pile
,3 coins in the second pile, 4 in the third pile, and 3 in the fourth pile?

#15 How many two-digit numbers exist such that the sum of the digits is a square number and reversing the digits in prime number?
#18,24,45,51,60
Sorry for thd inconvenience.

[darksaber21]

[darksaber21]

[lrp]

Thanks darksaber

[qwerty123]

@lrp...If you want answers to your questions, I suggest that you might want to type them out b/c as you can see, nobody is answering them. (not everyone has the test)

[lrp]

Thanks its cause I am kind of new to this so I dont get how it works

[237641]

http://schoolwires.henry.k12.ga.us/cms/ ... oblems.doc

Can someone plz post the answers to this worksheet really quick.

[Fredfredburger]

^^^not sure if bot or not.

18
If you subtract 2 from [unparseable or potentially dangerous latex formula] then you have an odd function, which means [unparseable or potentially dangerous latex formula]. What that means is that if [unparseable or potentially dangerous latex formula] then you can plu that into your second function as [unparseable or potentially dangerous latex formula]. Sorry if that was confusing, I believe there was another post that explained it better than I did.

24


51
D is your vertical shift, which is the center of the sin curve, vertically speaking: Here it equals 5

A is your Amp, or the maximum displacement from the vertical shift. The max is 8, 8-5=3. In addition, this sine curve is reflected over the origin, or multiplied by -1, so A=-3

You can find B through [unparseable or potentially dangerous latex formula] where P is your period, or the distance between crest. Here that distance is [unparseable or potentially dangerous latex formula] so B=2

The sine curve is centered at 0, so your Horizontal Shift, or [unparseable or potentially dangerous latex formula], is 0 and C equals 0

5-3+2+0=4

60
Look at , especially the examples.

The harmonic mean of the roots a,b, and c of a cubic polynomial is
[unparseable or potentially dangerous latex formula]

or when you express it in terms of the coefficients of the polynomial,
[unparseable or potentially dangerous latex formula] so [unparseable or potentially dangerous latex formula]

[Fredfredburger]

45
Your initial fraction can be expressed as [unparseable or potentially dangerous latex formula] where a is a multiple to make it a whole number.

You're adding some x so that your new fraction is 45% or [unparseable or potentially dangerous latex formula]

In mathematical terms
[unparseable or potentially dangerous latex formula]

Cross multiply and solve
[unparseable or potentially dangerous latex formula]
or
[unparseable or potentially dangerous latex formula]

The smallest positive integer solution to the set (x,a) is (12,11), verify.