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kykrilka [37]
3 years ago
15

Of the 20 students in Emily's class 15 like chocolate cake and the rest like cheesecake how many like cheesecake and what percen

tage of the students like cheesecake
Mathematics
2 answers:
LiRa [457]3 years ago
8 0
Subtract 15 from 20 to get 5 (the number of "cheesecake" kids). Personally, I find ratios easy to convert to percentages, so 5:20 = 25:100, which is easily convertible to 25%. Your answers are 5 kids like cheesecake, which is 25% of all students.
alisha [4.7K]3 years ago
4 0
5 students like cheesecake because if there is 20 students in all and 15 like chocolate and the rest like cheesecake you do 20-15=5

If 5 students like cheesecake out of 20 it would be 5/20 20*5=100 just multiply by 5 5*5=25%


25% of students like cheesecake 
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Juli2301 [7.4K]
Add 3 to both sides so that the equation becomes -2x^2 + 5x + 5 = 0.
To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
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                              x = [ -5 ± √(5^2 - 4(-2)(5)) ] / ( 2(-2) )
                              x = [-5 ± √(25 - (-40) ) ] / ( -4 )
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5 0
3 years ago
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Helga [31]

Answer:

A . a = 3/5

Step-by-step explanation:

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Add 2/5 to each side

-2/5 + a + 2/5 = 1/5 + 2/5

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Therefore a = 3/5

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I don't think they are equivalent. try it yourself


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Which equation can be used to solve X in the following diagram?
nata0808 [166]

The answer is

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3 years ago
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Verdich [7]

Answer:

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Step-by-step explanation:

To solve for r in terms of s, t, and u, means to have r on one side and have t, u, and s.

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t - u = s + r

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