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rewona [7]
3 years ago
9

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. Kevin spins th

e spinner 180 times. About how many times should Kevin land on red or purple?
about 18 times
about 36 times
about 40 times
about 72 times
Mathematics
2 answers:
AleksandrR [38]3 years ago
6 0

Answer:

72

Step-by-step explanation:

SCORPION-xisa [38]3 years ago
3 0
About 72 times.

Since Kevin has a 40% chance to land on red or purple each time, you turn that into a decimal (.40) and multiply it by 180.
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Given that α and β are the roots of the quadratic equation <img src="https://tex.z-dn.net/?f=2x%5E%7B2%7D%20%2B6x-7%3Dp" id="Tex
siniylev [52]

Answer:

\large \boxed{\sf \ \ \ p=-11 \ \ \ }

Step-by-step explanation:

Hello,

\alpha \text{ and } \beta \text{ are the roots of the following equation}

   2x^2+6x-7=p

It means that

   2\alpha^2+6\alpha-7=p \\\\2\beta ^2+6\beta -7=p \\\\

And we know that

\alpha= 2\cdot \beta

So we got two equations

   2(2\beta)^2+6\cdot 2 \cdot \beta -7=p \\\\8\beta^2+12\beta -7=p\\\\ and \ 2\beta ^2+6\beta -7=p \ So \\\\\\8\beta^2+12\beta -7 = 2\beta ^2+6\beta -7\\\\6\beta^2+6\beta =0\\\\\beta(\beta+1)=0\\\\ \beta =0 \ or \ \beta=-1

For \beta =0, \ \ \alpha =0, \ \ p = -7

For \beta =-1, \ \ \alpha =-2, \ \ p= 2-6-7=-11, \ p=2*4-12-7=-11

I assume that we are after two different roots so the solution for p is p=-11

b) \alpha +2 =-2+2=0 \ and \ \beta+2=-1+2=1

So a quadratic equation with the expected roots  is

x(x-1)=x^2-x

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

3 0
2 years ago
Need help po, needed today. Thanks! ​
Dimas [21]

Answer:

<h2>question is not up down this is incorrect questions</h2>
8 0
2 years ago
The sum of three and a number is 24
Whitepunk [10]

Answer:

Step-by-step explanation:

whenever you see these questions, just subtract the first number, 3, from the total number. Doing this, 24 - 3 = 21

The number is 21

4 0
3 years ago
Read 2 more answers
Christine is putting money into a savings account. She starts with $650 in the savings account, and each week she adds $60. Let
TEA [102]

Total amount of money in the savings account after 11 weeks is $1310.

Total money in the account =

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Given:

Initial Money = $650

Money added per week = $60

Total money in the account = S

Number of weeks = W

Substituting it in the above equation we get,

S = $650 + $60xW                                          (General Equation)

Total amount of money in the savings account after 11 weeks

S = $650 + $60x11

S = $650 + $660

S = $1310

Thus total amount of money in the savings account after 11 weeks is $1310.

Learn more about Linear Equations here :

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8 0
1 year ago
4 / 500 in scientific notation would be?
Lubov Fominskaja [6]
4/500=0.008

scientific notation form = 8 x 10^9
3 0
3 years ago
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