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bulgar [2K]
3 years ago
12

-14+3x+30 = 7(2x+4)+x

Mathematics
1 answer:
zalisa [80]3 years ago
8 0
First, let's simplify the sentence:
3x+16 = 14x+28+x
3x + 16 = 15x + 28
Then we isolate x on one side:
12x = -12
x = -1 
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We decided that the movie night will last four hours each movie takes 1.75 hours and we want to make sure we leave a half hour f
Naddik [55]
2 movies
4 hours - .5 popcorn -1.75-1.75=0 Easier terms 4 hours minus 30 min is 3 hours and 30 min left each movie is 1 hour and 45 min plus 1 hour 45 min i that's 2 hours and 90 min 90 min are one hour and 30 min. So 2 hours plus one hour and 30 min is the 3 hours and 30 min are we're left
4 0
3 years ago
How many different ways can you write a fraction that has a numerator of 2 as a sum of fractions
svetoff [14.1K]
Infinitely many ways! 
Suppose you have the fraction 2/d.

<span>Pick </span>any<span> pair of integers a and b where b ≠ 0.</span>
Then 2b-ad is and integer, as is bd so that (2b - ad)/bd is a fraction.

Consider the fractions a/b and (2b - ad)/bd

<span>Their sum is </span>
a/b + (2b-ad)/bd = ad/bd + (2b-ad)/bd = 2b/bd = 2/d - as required.

<span>Since a and b were chosen arbitrarily, there are infinitely many possible answers to the question.</span>
5 0
3 years ago
In a race in which twelve automobiles are entered and there are no​ ties, in how many ways can the first three finishers come​ i
k0ka [10]
That is 3 slots
12 in 1st slot
11 in 2nd
10 in 3rd

so that is 12*11*10 or 1320 ways
3 0
3 years ago
Read 2 more answers
Fred’s birthday party will be in a room at the community center.  The room can hold no more than 75 people. He wants to use tabl
Zepler [3.9K]

Answer:

I think it's D? However I'm not sure.

6 0
3 years ago
Reduce to simplest form. - 3/5 + 1/3
Pani-rosa [81]

Answer: -4/15

Step-by-step explanation: To add these two fractions together,

we start by finding their <em>Least Common Denominator</em> (LCD).

Since our denominators of 5 and 3 have no factors in common,

our least common denominator is 5 · 3 or 15.

In order to get a denominator of 15 in each fraction,

we multiply top and bottom of the first fraction by 3

and top and bottom of the second fraction by 5.

That gives us -9/15 + 5/15 which simplifies to -4/15.

As your last step, make sure that the fraction

that you end up with doesn't reduce.

In this case, -4/15 does not reduce but watch out for this last step.

8 0
3 years ago
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