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Allushta [10]
3 years ago
12

Find the solutions to the equation below check all that apply

Mathematics
2 answers:
natima [27]3 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]3 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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Use slopes and y-intercepts to determine if the lines y=−x2+14 and 3x−4y=−1 are parallel.
Keith_Richards [23]
Answer: the lines are not parallel.


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7 0
3 years ago
David's bowling score is 6 less than 2 times Aaron's score. The sum of their scores is 84. Find the score of each student. Use t
Y_Kistochka [10]

Answer:

Aaron's bowling score is 30

David's bowling score is 54

Step-by-step explanation:

The variable representing Aaron's score is = a

The variable representing David's bowling score = d

The sum of their scores is 84.

= a + d = 84...... Equation 1

David's bowling score is 6 less than 2 times Aaron's score.

d = 2a - 6

Substituting 2a - 6 for d in Equation 1

a + 2a - 6 = 84

3a - 6 = 84

3a = 84 + 6

3a = 90

a = 90/3

a = 30

Hence, Aaron's bowling score is 30

d = 2a - 6

d = 2(30) - 6

d = 60 - 6

d = 54

David's bowling score is 54

8 0
3 years ago
Use an equation to find the value of k so that the line that passes through the given slope (1,3) , (5,k) m=2
scoray [572]

Answer:

The value of k with given points and slop = 11

Step-by-step explanation:

Given that a line passes through two points having slop (m) = 2

co ordinates of points are (1 , 3)   and (5 , k)

Now slop of line can be written as,

Slop = \frac{(y2 - y1)}{(x2 - x1)}

Or, m =  \frac{(y2 - y1)}{(x2 - x1)}

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Or, 2 =  \frac{(k - 3)}{(4)}

So , k - 3 = 8

∴ K = 8+3 = 11

Hence the value of k with given points and slop = 11    Answer

5 0
3 years ago
Can i please get some help on this one?
snow_lady [41]

Answer:

wht yr u in tis is too hard yk

Step-by-step explanation:

5 0
3 years ago
The first person who answers correctly gets thanks and braniy!
Nuetrik [128]
That arrow helps a lot.
One
Scale factor = 21/14 = (3*7)/(2*7) = 3/2 the sevens cancel out.

Two
Scale factor = 24/18 = (6 *4) / (6 * 3) The 6s cancel out 
Scale factor = 4/3
8 0
3 years ago
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