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Delvig [45]
3 years ago
12

3(x+7) simplify the expressions

Mathematics
2 answers:
Nitella [24]3 years ago
6 0

Answer:

3x + 21

Step-by-step explanation:

(3 × x) + (3 × 7)

3x + (3 × 7)

3x + 21

Ne4ueva [31]3 years ago
4 0

Answer:

3x+21

Step-by-step explanation:

you distribute the 3 which gives you 3x and 7x3 which is 21.

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Given f(a) = 2^a + 6, find f(3)
Artist 52 [7]

Answer:

14

Step-by-step explanation:

you substitute a with 3. so 2x2x2=8. then you do 8+6=14

6 0
3 years ago
Is there anyone thats good at algebra and geometry and is able to teach the subject, who is in highschool?
Gnoma [55]
I'm pretty good at algebra.
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3 years ago
A silver coin is 32 years older than a gold coin. In 8 years, the silver coins will be three times as old as the gold coin. Find
miss Akunina [59]

Answer:

The silver is now 50 years old and the gold coin is 18 years old

Step-by-step explanation:

first the silver was 32 years old , and it said it would be three times as old as the gold coin, to find the gold coin is to divide 32 and 3 together, that would be 10.6 but you can round the number up, you get 10 years.

you now can just get add 8 years to the 32 and 10

that would be 50 years old silver coin and 18 years for the gold coin.

4 0
3 years ago
-repost for new answers-
gulaghasi [49]

Answer:

3 Minute

Step-by-step explanation:

So the pool can hold 60 gallons, and the pool already has 12 gallons. He wants to fill it up to 27 gallons, so the amount of gallons he has to fill is 27-12 = 15. if 6 gallons are poured in per minute and 6x2 = 12, 6x3 = 18, it will take 3 minutes for the pool to be filled

8 0
3 years ago
Read 2 more answers
The side lengths of a triangle are 9, 11. 6. Is the triangle a right triangle?*
ratelena [41]

Answer:

No

Step-by-step explanation:

In a right angle triangle, based on Pythagoras theorem, the sum of the squares of the adjacent and opposite sides must equal to the square of the hypotenuse.

     The hypotenuse is the side with the longest length:

            H²  = O²  + A²

 if from the given lengths;

           H = 11, O = 9 and A = 6

Let us see if this is true;

          H²  = 9² + 6²

          H²  = 81 + 36

         H² = 117

But H², 11²  = 121 and this is not true

 The triangle is not a right angled one.

5 0
3 years ago
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