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tresset_1 [31]
3 years ago
5

Could someone help? Thanks

Mathematics
1 answer:
Charra [1.4K]3 years ago
5 0

Answer:

x = -3, y = -0.512

x = -1, y = -3.2

x = 0, y = -8

x = 2, y = -50

Step-by-step explanation:

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The department of public safety has an old memo stating that the number of accidents per week at a hazardous intersection varies
marysya [2.9K]

Answer:

C. 0.1515

Step-by-step explanation:

The main objective here is to find the P-value for the test of H_0

Given that ;

the mean value = 2.2

the standard deviation = 1.4

number of recorded accident per week = 52

The null  hypothesis is : H_o: \mu =2

The alternative hypothesis is : H_A = \mu < 2

The Z- value can be calculated as:

z = \dfrac{x- \mu}{\dfrac{\sigma }{\sqrt{n}}}

z = \dfrac{2- 2.2}{\dfrac{1.4 }{\sqrt{52}}}

z = \dfrac{- 0.2}{\dfrac{1.4 }{7.211}}

z = -1.03

From the normal distribution table for probability;

P(z< -1.03 ) = 0.1515

6 0
4 years ago
Write a linear function in slope intercept form given the slope of the equation is -4 and the y intercept is 6.
hoa [83]

Answer:

6=-4x+b

Step-by-step explanation:

You plug in the numbers but the formula that you use is y=mx+b with x being the number you don't know

4 0
3 years ago
Please solve this problem
musickatia [10]

Answer:

Step-by-step explanation:

Multiply each side by 6x.

4x+x\sqrt{3\\ = 30

Square both sides.

16x^2+3x^2=900 = 19x^2

x^2= about \sqrt{47.37}

x=6.9

5 0
3 years ago
2. Solve this inequality. Show your work. 5.6+2.2.x &gt; 65.6-1.8x​
Nitella [24]

Answer: x>15

Step-by-step explanation: Rearrange the equation by subtracting what is to the right of the greater than sign from both sides of the inequality:

          (56/10)+(22/10)*x-((656/10)-(18/10)*x)>0  

           

Simplify   9/5

           

  56  22      656  9

 (——+(——•x))-(———-(—•x))  > 0  

  10  10      10   5

         

Simplify 328/5

             

  56  22      328 9x

 (——+(——•x))-(———-——)  > 0  

  10  10       5  5  

Adding fractions which have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

328 - (9x)     328 - 9x

——————————  =  ————————

    5             5    

  56/10+22/10.x/5)) >0      (328 - 9x)

   

         

Simplify  11/5

           

  56/10+11/5.x/5))->0 (328-9x  

         

Simplify 28/5

       

  28    11x     (328 - 9x)

 (—— +  ———) -  ——————————  > 0  

  5      5          5      

Adding fractions which have a common denominator

     Adding fractions which have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

28 + 11x     11x + 28

————————  =  ————————

   5            5    

:

 (11x + 28)    (328 - 9x)

 —————————— -  ——————————  > 0  

     5             5      

Adding fractions which have a common denominator

       Adding fractions which have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

(11x+28) - ((328-9x))     20x - 300

—————————————————————  =  —————————

          5                   5    

   Pull out like factors :

  20x - 300  =   20 • (x - 15)  

 20 • (x - 15)

 —————————————  > 0  

     Multiply both sides by  5  

   Divide both sides by  20  

Solve Basic Inequality :

  Add  15  to both sides

            x > 15

4 0
3 years ago
Read 2 more answers
Mr Coope drives 472 miles in 8 hours. At this rate, how many miles would he drive in 6
KatRina [158]
8hrs = 480mins
6hrs = 360 mins
472/480 = 0.983...
0.983... x 360 = 354
D) 354
6 0
3 years ago
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