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Doss [256]
3 years ago
7

I need help solving 7-3x=x-2(2+x)

Mathematics
1 answer:
mrs_skeptik [129]3 years ago
4 0

Answer:

x = 5.5

Step-by-step explanation:

First, you need to distribute the -2:

-2(2+x) = -2x-4

Next you simplify:

x-2x = -x

Then you get all the x values on one side of the equation and everything else on the other side:

7-3x = -x-4   -->   11 = 2x

Finally, you isolate the x by dividing:

2x = 11   -->   x = 5.5

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A lock has a three number code made up of 17 numbers if none of the numbers are allowed to repeat how many different ways can yo
Marrrta [24]

Answer:

680

Step-by-step explanation:

Use the binomial coefficient where you choose k=3 numbers out of n=17 possible numbers and find the total amount of combinations since order does not matter:

\displaystyle \binom{n}{k}=\frac{n!}{k!(n-k)!}\\ \\\binom{17}{3}=\frac{17!}{3!(17-3)!}\\\\\binom{17}{3}=\frac{17!}{3!(14)!}\\\\\binom{17}{3}=\frac{17*16*15}{3*2*1}\\\\\binom{17}{3}=680

Thus, you can make 680 three-non-repeating-number codes

8 0
2 years ago
6.988.800km convert to miles
Pavlova-9 [17]
<span>4.34214189 miles  is your answer</span>
8 0
3 years ago
Read 2 more answers
Farmer frank is planting corn in a three-acre field.He will plant a total of 347 rows with 270 corn plants in each row.How many
iren [92.7K]
This is simple long multiplication. 347 x 270 is 93,690. Then you divide this number by the amount of acres, in this case, 3. So 93,690/3 is 31,230. Hope this helped
3 0
3 years ago
Read 2 more answers
If f(x) =x/4 - 3 and g(x) = 4x2 + 2x - 4, find (f +g)(x).
Iteru [2.4K]

Answer:

4x^2 +9x/4 -7

Step-by-step explanation:

f(x) =x/4 - 3

g(x) = 4x^2 + 2x - 4

(f +g)(x) = x/4 - 3  +  4x^2 + 2x - 4

             = 4x^2 + 8x/4+x/4 -7

             = 4x^2 +9x/4 -7

8 0
3 years ago
Which number is relatively prime to 63?<br> A. 114<br> B. 99<br> C. 87<br> D. 25
ElenaW [278]

Answer:

The answer is 114 which is the first answer which is A

Step-by-step explanation:

The rest 99, 87, and 25 just dont

Hope this helps you

7 1
4 years ago
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