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Nikolay [14]
3 years ago
14

Find the zeros of the polynomial x2-7​please answer step by step

Mathematics
1 answer:
Yuki888 [10]3 years ago
6 0

Answer:

x = ± \sqrt{7}

Step-by-step explanation:

To find the zeros equate the polynomial to zero, that is

x² - 7 = 0 ( add 7 to both sides )

x² = 7 ( take the square root of both sides )

x = ± \sqrt{7}

Thus the exact solutions are

x = - \sqrt{7} , x = \sqrt{7}

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One angle of a triangle measures 65°. The other two angles are in a ratio of 3:20. What are the measures of those two angles?
Nataly_w [17]

Answer:

15° and 100°

Step-by-step explanation:

65 + 3x + 20x = 180

23x = 115

x = 5

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3 0
2 years ago
Grandma has just finished baking a large rectangular pan of brownies. She is planning to make rectangular pieces of equal size a
Nikitich [7]

Answer: 60

Step-by-step explanation:

Let the side lengths of the rectangular pan be m and n. It follows that (m-2)  (n-2)= mn/2

So, since haf of the brownie pieces are in the interior. This gives 2 (m-2) (n-2) =mn

mn- 2m - 2n- 4 = 0

Then Adding 8 to both sides and applying, we obtain (m-2) (n-2) =8

Since now, m and n are both positive, we obtain (m,n) = (5,12), (6,8) (up to ordering). By inspection, 5. 12 = 60

which maximizes the number of brownies in total which is the greatest number.

Hope that helped! =)

7 0
3 years ago
Please help me asap i will mark branlist please explain
Ulleksa [173]
It would be b because a^2+b^2=c^2 so in this case 5^2+8^2=c^2
6 0
3 years ago
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Brums [2.3K]

Answer:

Step-by-step explanation:

3 0
3 years ago
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(x + 21)°<br> 137°<br> find the value of x.
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Answer:

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Step-by-step explanation:

subtract 21 on both sides

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