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aleksandr82 [10.1K]
4 years ago
7

Please help solve number 30 and 31 please-show work to help me unerstand, thank you. :)

Mathematics
1 answer:
Mariana [72]4 years ago
8 0
-2(1-x) \leq 2x-7\\-2+2x \leq 2x-7\\-2 \leq -7\\\sf There~are~no~solutions~to~this~inequality

There are no solutions because the last, final inequality is false.

\sf Number ~of ~20~dollar~bills = n\\20n  \leq 100\\n = 5
You can only take a maximum of 5 twenty dollar bills in one transaction. 
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Pleaseeeeeeeeee helppppppppp meeeeeeeeeee
Bogdan [553]

Answers:

  1. Function
  2. Not a function
  3. Function
  4. Not a function

========================================

Explanation:

If x repeats itself, then we don't have a function. For instance, relation 2 has the x value -4 show up twice. That input leads to multiple outputs which is why we don't have a function. Relation 4 is a similar story (this time the input 'u' shows up twice).

Relations 1 and 3 don't have this issue, so they are functions.

4 0
3 years ago
Need help fast!!!! Is it Q N
saw5 [17]
Coin 1 is Q, the very top coin is N and the one below that is Q. For the bottom coin 2 that's N and the very bottom is also N and the one on top of the very bottom is Q. I hope that helped!
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8 0
3 years ago
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Your favorite dog groomer charges according to your dog's weight. If your dog is 15 pounds and under, the groomer
aliya0001 [1]

Answer:

hope the pics below helps!!

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5 0
3 years ago
Please help!! If f (x) = e^x sin x, then f’ (x) =
shusha [124]

Answer:

f'(x) =  {e}^{x}(  \sin x + \cos x )

Step-by-step explanation:

f(x) =  {e}^{x}  \sin  x \\  \\ f'(x) = \sin x \frac{d}{dx}  {e}^{x}  + {e}^{x}  \frac{d}{dx}  \sin x \\  \\ f'(x) =  \sin x \: {e}^{x}   +{e}^{x}  \cos x \\  \\ f'(x) =  {e}^{x}(  \sin x + \cos x )

5 0
3 years ago
A math class has a total of 36 students. The number of females is 10 less than the number of males. How many males and how many
netineya [11]
36=x+(x-10)
46=2x
23 males
13 females
6 0
3 years ago
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