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Mumz [18]
3 years ago
14

How many solutions does the system: picture have?

Mathematics
1 answer:
joja [24]3 years ago
4 0

Answer:

The system has one solution

Step-by-step explanation:

we have

9x+y=3 ------> equation A

9x-y=7 ------> equation B

Adds equation A and equation B

9x+y=3\\9x-y=7\\-------\\9x+9x=3+7\\18x=10\\x=10/18\\x=5/9

find the value of y

9(5/9)-y=7

5-y=7

y=5-7=-2

The solution is the point (5/9,-2)

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Florence has 7 liters of milk. She pours 34of a liter into her glass. How much milk is left?
antoniya [11.8K]

Answer:

6.66 liters

Step-by-step explanation:

34% of one liter would leave 66% of the liter left, and if you were to add the other 6 liters to it, you would get your answer.

6 0
2 years ago
What is 135% of 115?
Mandarinka [93]
20.25 or 20&1/4
100%-15
135%-x
100x=2025
*divide each side by 100*
x=20.25
or 
20&1/4
6 0
4 years ago
Read 2 more answers
One pie needs 1/2 cup of sugar Shelly has 4 and 1/4 cups of sugar how many pies can she make
Nookie1986 [14]
8 pies the 1/4 of a cup doesn’t really fit since you’d need another 1/4th of a cup to make a pie
7 0
4 years ago
Find the smallest positive integer n such that n(n+1)(n+2) is divisible by 247.
Butoxors [25]

Answer:

37 is the smallest positive integer n such that n(n+1)(n+2) is divisible by 247.

Step-by-step explanation:

First we will find the prime factors of 247:

247 = 13 x 19 (which are both prime).

So now we need to find a number (the smallest one) that is of the form (n)(n+1)(n+2) (the product of three consecutive numbers) and that is divisible by both 13 and 19 (and therefore divisible by 247)

Let's take a look at the multiples of 13: 13, 26, 39, 52...

Let's take a look at the multiples of 19: 19, 38, 57...

We can see that the first time we have two multiples close together are the 38 (for 19) and the 39 (for 17).

So, if our number has both 38 and 39 as factors, then it will be divisible by 247.

However, we need not two but three consecutive numbers, and since we want the number to be the smallest positive integer, we will add 37 (since our other choice would be to add 40 and that would make the number bigger) and thus our number is (37)(38)(39) or in other words (37)(37 + 1)(37 + 2) and therefore this is the smallest positive number such that n(n+1)(n+2) is divisible by 247.

5 0
3 years ago
If p − 1 is a factor of p4 + p2 + p − k, the value of k is
lakkis [162]
It's says p-1 is factor to the equation, so that means when
p=1, the remeinder of the equation is zero. Mening:

p4 + p2 + p - k = 0

plug p=1 into the equation and find k

1^4 + 1^2 + 1 - k = 0
1 + 1 + 1 - k = 0
k = 3
8 0
3 years ago
Read 2 more answers
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