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Allushta [10]
2 years ago
12

Find the solutions to the equation below check all that apply

Mathematics
2 answers:
natima [27]2 years ago
5 0

Answer:  The required correct options are

(B) x = -3  and  (E) x = 3.

Step-by-step explanation:  We are given to find the solutions to the following quadratic equation :

x^2-9=0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)

Since the given equation does not involve the term with x, so we will be using the method of square root to solve the equation.

The solution of equation (i) is as follows :

x^2-9=0\\\\\Rightarrow x^2=9\\\\\Rightarrow x=\pm\sqrt{9}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[\textup{taking square roo on both sides}]\\\\\Rightarrow x=\pm3\\\\\Rightarrow x=3,~~x=-3.

Thus, the required correct options are

(B) x = -3  and  (E) x = 3.

galben [10]2 years ago
3 0

Let's run down the list of answers and figure out which numbers work.


1^2 is 2, 2 - 9 = -7, so not A.

-3^2 is -9, -9 - 9 = 0, so not B.

2^2 is 4, 4 - 9 = -5, so not C.

-2^2 is -4, -4 - 9 = -13, so not D.

3^2 is 9, 9 - 9 = 0, so E is one answer.

-1^2 is -1, -1 - 9 = -10, so not F.


So, E will be your answer. Hope that helps!

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Find the value of each variable.
kap26 [50]

Answer:

EF = 18 in. & m∠F = 134 °

Step-by-step explanation:

Hi there,

In order to find the length of side EF, you should realize that this is an <u>isosceles triangle</u>. We know that two sides and two angles of this type of triangle are equal to each other. We also know that the lengths of the sides opposite of the congruent angles are equal to each other. Thus, we proved that length of side EF is equal to the length of side FG.

Therefore, EF is 18 inches because FG is 18 inches.

In order to find m∠F, you need to know that the sum of the angles in a triangle add up to 180°. You add all of the known angle values and subtract it by 180°.

m∠E + m∠G + m∠F = 180°

23° + 23° + m∠F =  180°

46° + m∠F = 180°

m∠F = 134°

Hope this explanation helps you understand this problem. Cheers.

5 0
3 years ago
5. The length of a rectangular swimming pool is 50 yards, and the width of the pool is 16
d1i1m1o1n [39]
The answer is C. I got this by doing a^2 + b^2= c^2. 50^2 + 16^2=c^2, 2500 + 256 = c^2, 2756 = c^2, then you take the square root of 2756 and that gives you your answer 52.50 yards. Hope this helps :D
7 0
2 years ago
Factor this completely thank you
jeka94

4(2x raise to power 2-4-7x)

3 0
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Explaining your answer can either include a counterexample, a diagram or a written explanation to support your answer.
anzhelika [568]

Answer:

sorry I didn't understanding this

6 0
2 years ago
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Alex

Answer:

r is 32

Step-by-step explanation:

because yes it was y

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