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Digiron [165]
3 years ago
6

Find the solution for the quadratic equation by completing the square. x^2+18x=63​

Mathematics
2 answers:
vekshin13 years ago
5 0

Good evening ,

Answer:

<h2>x = 3   or   x = -21</h2>

Step-by-step explanation:

x²+18x=63 ⇌ x²+18x+81 = 63 + 81

⇌ (x+9)² = 144  ⇌ (x+9)² = 12² ⇌ (x+9-12)(x+9+12) = 0

⇌ (x-3)(x+21) = 0

⇌ x=3 or x=-21.

:)

Bezzdna [24]3 years ago
4 0

Answer:

the answer is B -21, 3

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A model of a house has been drawn on a coordinate grid. One corner of the house has
sp2606 [1]

Answer:

Point(9,1)

Step-by-step explanation:

Given

Point: (6,3)

Required

Translate 2 units down and 3 units left

Taking the translation 1 after other

When a function is translated down, only the y axis is affected;

2 units down implies that, 2 be subtracted from the y value.

The function becomes

Point: (6, 3 - 2)

Point: (6, 1)

3 units right implies that, 3 be added tothe x value.

The function becomes

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Hence;

Option D answers the question

7 0
3 years ago
Please help I have tried over and over and can't get it​
nirvana33 [79]
1) -3
2) 6
3) 4
4) 2
5) 5
6) 5
7) 7
8) -3
9) 9
10) 6
11) -5
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5 0
2 years ago
The following table gives results from two groups of students who took a nonproctored test. Use a 0.01 significance level to tes
Nana76 [90]

Answer:

Original claim is \mu_{1} =\mu_{2}

Opposite claim is \mu_{1} \neq \mu_{2}

Null and alternative hypotheses:

H_{0}:\mu_{1} = \mu_{2}

H_{1} : \mu_{1} \neq \mu_{2}

Significance level: 0.01

Test statistic:

We can use TI-84 calculator to find the test statistic and P-value. The steps are as follows:

Press STAT and the scroll right to TESTS

Scroll down to 2-SampTTest... and scroll to stats.

Enter below information.

\bar{x_{1}}=70.29

Sx1=22.09

n_{1} = 30

\bar{x_{2}}=74.26

Sx2=18.15

n_{2} = 32

\mu_{1} \neq \mu_{2}

Pooled: Yes

Calculate.

The output is in the attachment.

Therefore, the test statistic is:

t=-0.78

P-value: 0.4412

Reject or fail to reject: Fail to reject

Final Conclusion: Since the p-value is greater than the significance level, we, therefore, fail to reject the null hypothesis and conclude that the there is sufficient evidence to support the claim that the samples are from populations with the same mean.

6 0
3 years ago
Chen buys 4 tickets to a soccer game. The total cost before taxes is $80. Which equation would you use to determine the price, p
Assoli18 [71]

Answer:

A. 4p=80

Step-by-step explanation:

Total Cost of 4 tickets=$80

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Total cost=price×quantity

80=p×4

80=4p

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80=4p

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7 0
3 years ago
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charle [14.2K]
The correct answer is

9x^2/10y^3
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3 years ago
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