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NeX [460]
1 year ago
14

5(3x+9)- 2x=15x-2(x-5)

Mathematics
2 answers:
avanturin [10]1 year ago
8 0

Answer:

There are no solutions.

Step-by-step explanation:

Alecsey [184]1 year ago
6 0

Answer:

This equation has infinitely many solutions

Step-by-step explanation:

Background: This is a problem where you need to find x, meaning that you must isolate x. To do this you can use different math properties to move terms to different sides or to cancel terms out in order to isolate x.

1. Parenthesis (Always start with what's in the parenthesis)

5(3x+9) and 2(x-5) are the equations that are in parenthesis and must be distributed.

5(3x+9) = 5*3x + 5+9 = 15x + 45

2(x-5) = 2*x - 2*5  = 2x - 10

You can then put these back into the equation

15x + 45 - 2x = 15x - 2x + 10

2. Bring together like terms

You can then simplify both sides that have like terms.

On the left side 15x and -2x are like terms, so you can put them together:

15x - 2x = 13x.

This is also the case with the right side:

15x - 2x = 13x

When you put them together it gives: 13x + 45 = 13x +45

3. Isolate x

You now want to isolate x so you can subtract 13x on both sides, which ends up giving you 45=45

Since 45=45 is TRUE, then that means that any value of x you put in will always give you the same number on both sides, letting this equation have infinitely many solutions.

You might be interested in
A political polling organization wishes to select a smaller focus group from a group of 7 Republicans, 10 Democrats, and 2 Indep
Alina [70]

Answer:

a) 1470 ways

b) 2835 ways

Step-by-step explanation:

the question is not correct, in the correct question The number of independents should be 3 not 2

there are 7 republicans, 10 democrats and 3 independents.

C(n,r) is the number of different combinations of n distinct objects taken r at a time.

C(n,r) = \frac{n!}{(n-r)!r!}

a) it will consist of 1 Republican and 4 Democrats

The number of ways this can be chosen is = C(7,1) × C(10,4) = \frac{7!}{(7-1)!1!}  * \frac{10!}{(10-4)!4!} = 7 × 210 = 1470 ways

(b) it will consist of 2 Republicans, 2 Democrats, and 2 Independents (consist of 2 independents not 3)

The number of ways this can be chosen is = C(7,2) × C(10,2) × C(2,2)

 =\frac{7!}{(7-2)!2!}  * \frac{10!}{(10-2)!2!}* \frac{3!}{(3-2)!2!} = 21 × 45 × 3 = 2835 ways

7 0
3 years ago
A bookshelf can hold a maximum of 45 books. Let b represents the number of books to be shelved. Which inequality represents how
leonid [27]
The number of books that can be shelved is 45. So then we know that the amount that need to be shelved <em>can</em> be 45, if the bookshelf had 0 books on it. This means that it can have the equal part of the inequality sign.

However, the amount of book that need to be shelved cannot <em>exceed</em> 45, so b must be less than 45.

Therefore, the answer must be D) b ≤ 45.
7 0
3 years ago
Choose the line that is the best fit for the data.
Svet_ta [14]

Answer:

I would say line 2

Step-by-step explanation:

just think it is

3 0
2 years ago
Can someone help me solve this?
Dovator [93]

Answer:

5 felt pads.

7 cards.

Step-by-step explanation:

Remark

  • The total number of items is 12
  • So let the felt sheets be x
  • Let the cards = y

Equations and Solution

x + y = 12

Now the price is 7.75 that she has to pay for the 12 items. She wants to come back with 0 dollars.

0.5x + 0.75y = 7.75             Multiply this equation by 2

x + 1.5y = 15.50                    write the first equation underneath and subtract.

<u>x +    y =   12</u>

      .5y =  3                          Divide by 0.5

y = 3/0.5

y = 7

So she can get 7 cards.

x + y = 12

x + 7 = 12

x = 12 - 7

x = 5

So she can buy 5 felt pads.

8 0
3 years ago
Help on this this is the last one promise!!
tankabanditka [31]

6) check picture

a) all three lines are parellel and have the same slope. the only difference is that they are translated on different points on the x-axis.

not sure about the rest sorry :(

6 0
3 years ago
Read 2 more answers
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