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olga nikolaevna [1]
2 years ago
13

Which two values of x are roots of the polynomial below?

Mathematics
1 answer:
Julli [10]2 years ago
4 0

Answer:

B. and C.

Step-by-step explanation:

1. Set the polynomial equal to zero:

x² + 5x + 7 = 0

2. Plug the given values of a, b, and c into the quadratic formula:

x=\frac{-5+-\sqrt{5^{2}-4(1)(7) } }{2(1)}

3. Solve the square root:

x=\frac{-5+-\sqrt{25-4(1)(7)} }{2(1)}

x=\frac{-5+-\sqrt{25-28} }{2(1)}

x=\frac{-5+-\sqrt{-3} }{2(1)}

4. Simplify the rest:

x=\frac{-5+-\sqrt{-3} }{2}

5. Separate the solutions:

x=\frac{-5+\sqrt{-3} }{2}  , x=\frac{-5-\sqrt{-3} }{2}

Thus, options B and C are the answers.

hope this helps!

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12345 [234]
A^2 + b^2 = c^2
3^2 + 4^2 = c^2
9 + 16 = c^2
25 = c^2
5 = c
5 0
3 years ago
An elf ate 15 of your muffins. that was 5/8 of all of them. how many are left?
zavuch27 [327]

Answer: 9

Step-by-step explanation:

An elf ate 15 of your muffins and that was 5/8 of all of them. To get the number of muffins left goes thus:

We can first calculate the total number of muffins the person had. Let the total number of muffins be y. That means the elf ate 5/8 of y.

5/8 of y = 15

5/8 × y = 15

0.625 × y = 15

0.625y = 15

Divide both side by 0.625

0.625y/0.625 = 15/0.625

y = 24

The total amount of muffins is 24. Since the elf has eaten 15, the amount left will be: 24-15 = 9

6 0
3 years ago
Find the product for this problem <br> 1.<br> 257<br> x 50
Reptile [31]

Answer:

The answer to this is 12850

Step-by-step explanation:

<h2>Also check out our you tube channel about math called <em>Evimero Academy</em></h2>

<em />

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<h3><u><em>thank you</em></u></h3>
3 0
3 years ago
Which equation shows the best estimate for 4,310 ÷ 72 using compatible numbers? A. 4,900 ÷ 70 = 70 B. 4,200 ÷ 70 = 60 C. 4,000 ÷
sveta [45]
I think it's B. because 4,310 divided by 72 is about 59. And 4,200 divided by 70 is 60.
6 0
3 years ago
Write the ratios in simplest form <br><br>42/28​
Semmy [17]

Answer:

3/2

Step-by-step explanation:

Hope this helps! feel free to mark brainliest and have a great day!

7 0
3 years ago
Read 2 more answers
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