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nevsk [136]
3 years ago
11

Substituting y = –2 back into the first equation gives

Mathematics
2 answers:
Elenna [48]3 years ago
4 0

Answer: idk the first equation

Step-by-step explanation:

katrin [286]3 years ago
3 0

Answer:

-2x+-6=-12

Step-by-step explanation:

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A recipe for lemonade calls for 1 cup of sugar and 5cups of water. How much sugar is used per cup of water?
umka2103 [35]
1/5th of a cup of sugar is used.
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I NEED AN MATH EXPERT ON THIS..Ill give brainless and extra points​
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NISA [10]

For this case we must find the solution of the following quadratic equation:

x ^ 2 + 5x + 7 = 0

Where:

a = 1\\b = 5\\c = 7

Then, the solution is given by:

x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}

Substituting the values:

x = \frac {-5 \pm \sqrt {5 ^ 2-4 (1) (7)}} {2 (1)}\\x = \frac {-5 \pm \sqrt {25-28}} {2}\\x = \frac {-5 \pm \sqrt {-3}} {2}

By definition we have:i ^ 2 = -1

x = \frac {-5 \pm \sqrt {3i ^ 2}} {2}\\x = \frac {-5 \pm i \sqrt {3}} {2}

Thus, we have two complex roots.

Answer:

The equation has no real roots.

4 0
4 years ago
Express each product in the simplest form.
ololo11 [35]
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5 0
4 years ago
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In a number with at least two digits, the last number was removed. The resulting number was n smaller than ghe previous one.
BartSMP [9]

Answer:

The largest possible value of n is 11.

(A) is correct option.

Step-by-step explanation:

Given that,

The number with at least two digits,the last number was removed. The resulting number was n smaller than the previous one.

We need to find the largest possible value of n

Using given data,

The smallest number of two digit is 10.

Now, we removed last digit then we get 1 which is equal to 10 divided 10.

So, n = 10

But the largest number of two digit is 99.

We removed last digit then we get 9 which is equal to 99 divided 11.

So, n = 11

Hence, The largest possible value of n is 11.

(A) is correct option.

5 0
3 years ago
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