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mixer [17]
3 years ago
14

I am thinking of a number. If you multiply my number by four, add -4 to the product, and then take 1/3 of the sum, the result is

-6. Find my number.
Mathematics
1 answer:
bogdanovich [222]3 years ago
6 0

Answer:

x = - \frac{7}{2}

Step-by-step explanation:

x=unknown number

\frac{4x + ( - 4)}{3}  =  - 6

4x - 4 =  - 18

4x =  - 14

x =  \frac{ - 14}{4}

simplify the fraction so... -7/2

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I think the answer is C) 4x=12 but I am not sure. Please help and explain!!
Dmitriy789 [7]

You are correct, C) 4x = 12.

So, if 4 people are eating 12 pieces of pizza, simply divide 12 by 4 and there's your answer!

12 / 4 = 3     Each person gets 3 slices of pizza.

8 0
3 years ago
Which of the following is equivalent to f(x)?
Fynjy0 [20]

Answer:

  • D. x^{-3/2}

Step-by-step explanation:

<u>Given function:</u>

  • f(x) = \frac{1}{x\sqrt{x} }

<u>Equivalent expression is:</u>

  • \frac{1}{x\sqrt{x} } = x^{-1}x^{-1/2} = x^{-1 - 1/2} = x^{-3/2}

Correct choice is D

6 0
3 years ago
If 5a=-4b+5 and 3a=-2b+3, what is 6b?
Misha Larkins [42]
There are two equations and two variables. You can solve for each variable using either the elimination method or the substitution method. Here, I believe the elimination method would be best:
5a = -4b + 5
3a = -2b + 3
You can multiply the second equation by two, so the 4b and -4b in both equations will cancel each other out when you add them. So:
5a = -4b +5
6a = 4b +6
Add both equations together.
11a = 11
a = 1
Plug in the a value into any of the previous equations:
5(1) = -4b + 5
-4b = 0
b = 0
So, since we know that b = 0, 6b is also 0.
6 0
3 years ago
Factor this trinomial completely.
kifflom [539]

Answer:

2 ( x+3) (x+1)

Step-by-step explanation:

2x^2+8x+6

Factor out a 2

2(x^2 +4x+3)

Factor in side the parentheses

What multiply to 3 and adds to 4  (3(1=3  3+1 =4)

2 ( x+3) (x+1)

8 0
3 years ago
Need some help with this photo it would be much appreciated :)
masya89 [10]

Answer:

12.6

Step-by-step explanation:

c=2 x 3.14 x r

2 x 3.14= 6.28

6.28 x 2= 12.56

4 0
3 years ago
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