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mamaluj [8]
2 years ago
14

Which of the following are quadratic equations

Mathematics
1 answer:
Igoryamba2 years ago
6 0

Answer:

<h3>(ii) (x+2)²=7</h3>

<h3>(iv) M²-1 = 0</h3>

<h2>HOPE U UNDERSTOOD</h2>

★THANKS★

ANY DOUBTS? COMMENT PLEASE

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Dvinal [7]
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8 0
3 years ago
I need help I'm stuck ?
likoan [24]

v =  \frac{4}{3}  \times \pi \times  ({ \frac{8}{2} })^{3}  \\

v =  \frac{4}{3}  \times 3 \times  {4}^{3}  \\

v =  {4}^{4}

v =  {2}^{8}

v = 256 \:  \:  {cm}^{3}

7 0
2 years ago
The 2010 General Social Survey reported a sample where about 48% of US residents thought marijuana should be made legal. If we w
Sati [7]

Answer:

The sample size is  n  = 600

Step-by-step explanation:

From the question we are told that

    The  sample proportion is  \r  p = 0.48

     The  margin of error is  MOE  =  0.04

Given that the confidence level is 95%  the level of significance is mathematically represented as

        \alpha  =  100 - 95

        \alpha  =  5 \%

        \alpha  =  0.05

Next  we obtain the critical value of  \frac{\alpha }{2} from the normal distribution table , the values is

                   Z_{\frac{\alpha }{2}  } =  1.96

The reason we are obtaining critical value of    \frac{\alpha }{2} instead of    \alpha is because  

\alpha represents the area under the normal curve where the confidence level interval (  1-\alpha) did not cover which include both the left and right tail while  

\frac{\alpha }{2} is just the area of one tail which what we required to calculate the margin of error

Generally the margin of error is mathematically represented as

      MOE  =  Z_{\frac{\alpha }{2} } *  \sqrt{ \frac{\r p(1-  \r p )}{n} }

substituting values

          0.04= 1.96*  \sqrt{ \frac{0.48(1-  0.48 )}{n} }

         0.02041 = \sqrt{ \frac{0.48(52 )}{n} }

         0.02041 = \sqrt{ \frac{ 0.2496}{n} }

          0.02041^2  = \frac{ 0.2496}{n}

           0.0004166 = \frac{ 0.2496}{n}

=>       n  = 600

   

5 0
3 years ago
The measure of ∠1 is 65°. What is the relationship between ∠1 and ∠2
bagirrra123 [75]

Answer:

if its complemantary it is 24 degrees

if it supplemntary it is 115 degrees

Step-by-step explanation:

7 0
3 years ago
Hey 20 points for the first person to show work and answer this​
Harrizon [31]

Step-by-step explanation:

First, the pizza is 18 inches in diameter, so

d = 18

and, because the radium is half of the diameter,

r = 9

<u>Note that the units are inches.</u>

Using the equation

a = \pi  r ^{2}

where a is the area of a circle, we know that the area of the whole pizza is approx.254.5 square inches. Divide by 8 to find the area of 1/8 of a pizza. Each slice will have an area of approx. 32 square inches. For a precise result, the answer is

a(s)=  \frac{(\pi  \times 9^{2})}{s}

where a(s) is the area of a slice of pizza, and s is the total number of slices, given they are equal in size.

5 0
3 years ago
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