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Stella [2.4K]
3 years ago
11

A number divided by 5 is 22 find the number

Mathematics
2 answers:
Over [174]3 years ago
8 0
Hello!

You can multiply 5 × 22 OR you can divide.

Lets start from 90.

90 divided by 5 = 18
95 divided by 5 = 19
100 divided by 5 = 20
105 divided by 5 = 21
110 divided by 5 = 22

110 ÷ 5 = 22!

I hope this helps.
Naddika [18.5K]3 years ago
4 0

110 just multiply 5 by 22


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if alpha and beta are the roots of the equation 3x^2-9x+2=0 find the values of: (I) alpha ×beta + alpha^2 × beta. (ii) alpha^2-a
Kryger [21]

Answer:

in steps

Step-by-step explanation:

The question did not state if alpha>beta or alpha<beta, so the answer will have 2 answers  for each questions

3x²-9x+2=0

x = (-(-9) ± √(-9)²-4*(3)*(2)) / (2*3)

x = (9 + √57) / 6   or x = (9 - √57) / 6      (alpha and beta) or (beta and alpha)

(I) alpha (a) ×beta (b) + alpha² × beta = ab (1+a)

   = ((9 + √57) / 6) ((9 - √57) / 6) (1 + (9 ± √57))  

   = ((9² - (√57)²)/36) (10 ± √57)

   = (24/36) (10 ± √57)

   = 2/3 (10 ± √57)   or (11.7 or 1.63)

(ii) alpha²-alpha×beta+beta² = a² -2ab + b² +ab = (a - b)² + ab

if a is alpha    

=​ ((9 + √57) / 6) - ((9 - √57) / 6)) + ((9 + √57) / 6) ((9 - √57) / 6))  

    = √57/3 + 2/3

     = (√57 + 2) / 3

if a is beta

((9 - √57) / 6) - ((9 + √57) / 6)) + ((9 - √57) / 6) ((9 + √57) / 6))  

    = - √57/3 + 2/3

     = - (√57 + 2) / 3

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3 years ago
A box of cereal states that there are 81 calories in a 7-cup serving. What is the unit rate for calories
mr_godi [17]

Answer:

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2 cups = x calories

Cross Multiply

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x = 2 cups × 81 calories/7 cups

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Answer:

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The sum of these will simply be the sum of all the numbers 1 through 26, which is 351.
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