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irinina [24]
3 years ago
11

Question #6 I can't figure it out.

Mathematics
1 answer:
stepan [7]3 years ago
6 0
6 x 9 = 54
I think the know facts are 18 and 36, because they are the only basic numbers 6 and 9 can go into.
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We know the following about the numbers a, b and c:
labwork [276]

Step-by-step explanation:

(a + b)² = 9

(b + c)² = 25

(a + c)² = 81

Taking the square root:

a + b = ±3

b + c = ±5

a + c = ±9

By adding these three equations together and dividing both sides by 2, we get the value of a + b + c.

Possible combinations for a + b + c such that the sum is greater than or equal to 1 are:

a + b + c = (-3 + 5 + 9)/2 = 11/2

a + b + c = (3 − 5 + 9)/2 = 7/2

a + b + c = (3 + 5 + 9)/2 = 17/2

3 0
3 years ago
Simplify the following expression (30/45g+20)-(8/9g+7)
amid [387]

The answer is: 13-\frac{2}{9}g

The explanation is shown below:

1- You have the following expression given in the exercise:

(\frac{30}{45}g+20)-(\frac{8}{9}g+7)

2- When you multiply signs, you obtain:

\frac{30}{45}g+20-\frac{8}{9}g-7

3. Now, you must add like terms, as following:

-\frac{2}{9}g+13

4. Therefore, you have that the expression simplified is:

13-\frac{2}{9}g

8 0
3 years ago
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M +9 = -3<br> 8<br> What is the answer for m
harina [27]

Answer:

m=-12

Step-by-step explanation:

Not sure where the 8 comes from, but you would subtract 9 from the left side. The result is -12.

3 0
3 years ago
Simplify the expression<br> 12g + 9g
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