Melody

moll had some 10 cent coins and 50 cent coins in his savings bank . he had more 10 cent coins than 50 cent coins. the total value of the coins was $15.80.what was the total number of coins that moll had.

10T +50F = 1580           T > F

T     +5F   =  158

One solution would be T=158 and F=0

10(158 -  5a      ) +50(     b    ) =1580

158,  0

153,  1   =   154 coins

148,  2    =  150 coins

143,  3  =   146 coins

138,  4   =   144 coins

133,  5   =   138 coins

128,  6   =   134 coins

123,  7

118,  8

113,  9

108, 10

103,  11

98,    12

93,    13

88,    14

83,    15

78,    16

73,    17

68,    18

63,     19

58,     20  

53,     21

48,     22

43,     23

38,     24

33,     25         58 coins

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(154-58)/4 =  96/4  =  24

So there are many answers all of the form      

58+4k       where k is any integer and      \(0\le k \le 24\)

What is x in:

24-18x=60

minus 24 from both sides      then       divide both sides by -18 :)

You cannot simplify this.

5  and   9y are unlike terms so you cannot add them and get something different :)

Is 2 times x high 1/2 equal to x?

\(2*x^{1/2}=2\sqrt{x}\ne x\)

The function D(t)D(t) can be used to approximate the total average credit card debt in a U.S. household (in thousands of dollars) tt years after 1995. 

Interpret the meaning of the statement: D(30)=18.9D(30)=18.9.

That statement makes no sense to me at all.  Are you sure you copied it down correctly?

You answers are not all correct Pasplox  :(

-2^1 = -2, because -1*2 ^ 1 =-1*2=-2

-2^2 = -1*2^2= -4

-2^3 = -1*2^3= -8

-2^4 = -1*2*4= -16

ALL the above answers are negative!

BUT

So (-2)^4 REALLY DOES EQUAL  16

The brackets make all the difference :)

The platform for the high dive is 46 feet above the water. A diver jumps from the platform and lands in the water after 1.7 seconds. The function H ( s ) H(s) represents the height of the diver after s s seconds. Determine the practical domain and practical range of H ( s ) H(s) in this situation. All answers must include correct units of measure.

domain:    \( 0 \le t \le 1.7\; sec\)

range:       \(0 \le H(s) \le 46\;feet\)

3*10 power of 8? what is the ans

It is a 3 followed by 8 zeros :)

300 000 000

Hi again Sara, thank you for giving me what I asked for.  I can see that you did ask for more help before too, just like you said :)

It is very easy for things like this to be overlooked so it was good that you reposted.  :)

You have lots of answers now but if it is still not clear to you then say so.  :))

If you would like me, or someone else to look at it specifically for you, you can also message us privately, don't forget to include the address as well though so we can find it :)

If you have specific questions about someone's answer then aks them on the forum and maybe back it up with a private message :)

If the 45 seconds I a part of the 15 minutes AND you want to hear all of the report Then it will be 2/3 chance of waiting more than 5 minutes.