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Mekhanik [1.2K]
3 years ago
7

PLEASE HELP ME BRANNIEST

Mathematics
1 answer:
velikii [3]3 years ago
6 0

\text{The point-slope form}\\\\y-y_1=m(x-x_1)\\\\m-slope\\------------------------\\k:y=m_1x+b_1\\\\l:y=m_2x+b_2\\\\l\ \perp\ l\iff m_1m_2=-1\\\\\text{We have}\\\\y-3=-4(x+5)\to m_1=-4\\\\y=mx+b\to-4m=-1\qquad\text{divide both sides by (-4)}\\\\m=\dfrac{1}{4}\\\\\text{We have the point (-5, 7) and the slope. Substitute:}\\\\y-7=\dfrac{1}{4}(x-(-5))\\\\Answer:\ \boxed{y-7=\dfrac{1}{4}(x+5)}\to\boxed{C.}

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This answer would be (-14).

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3 years ago
What is 3/4 written as a percentage
Taya2010 [7]

Answer:

75%

Convert 3/4 to a percent. Begin by converting the fraction 3/4 into decimal. Multiply the decimal by 100 and write the result with the percentage sign: 0.75 × 100 = 75%.

Step-by-step explanation:

4 0
3 years ago
gasoline was $3.759 per gallon 1 week and 3.879 per gallon by next week how much did the price change ​
Valentin [98]

Answer:

.12 cent

Step-by-step explanation:

7 0
3 years ago
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What is the standard deviation of this data set? Use a calculator to help you.
ale4655 [162]

Answer:

Standard deviation = 14.064

Step-by-step explanation:

We are given the following data;

        X                          X - Xbar                  (X-Xbar)^{2}

       20                     20 - 46 = -26                    676

       23                     23 - 46 = - 23                    529

       32                     32 - 46 = -14                      196

       36                     36 - 46 = -10                      100

       41                      41 - 46 = -5                         25

       43                     43 - 46 = -3                          9

       44                     44 - 46 = -2                          4

       45                     45 - 46 = -1                           1

       47                      47 - 46 = 1                            1

       54                      54 - 46 = 8                        64

       55                      55 - 46 = 9                        81

      59                       59 - 46 = 13                      169

       61                       61 - 46 = 15                       225

       63                       63 - 46 = 17                      289

       66                       66 - 46 = 20                <u>     400    </u>    

                                                    \sum(X-Xbar)^{2} <u>= 2769 </u>

Firstly we will calculate Mean, Xbar = \frac{\sum X}{n}

  Xbar = \frac{20+ 23+ 32+ 36+ 41+ 43+ 44+ 45+ 47+ 54+ 55+ 59+ 61+ 63+ 66}{15} = 45.93 ≈ 46

Now, Standard deviation formula is given by;

                   s = \sqrt{\frac{ \sum(X-Xbar)^{2}}{n-1}} = \sqrt{\frac{ 2769}{15-1}} = 14.064 .

7 0
3 years ago
Pring 2022
lutik1710 [3]

Answer:

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Step-by-step explanation:

The equation is :

  • <u>c = 10 - 11(0.65)</u>

<u />

Change will be :

  • c = 10 - 7.15
  • c = $2.85
5 0
2 years ago
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