The cumulative frequency of students who earned a score of 20 or lower on the quiz is option d) 68.
<h3>What is the frequency about?</h3>
The relative cumulative frequency of students in the question is seen as those who earned a score of 20 to be 0.68 or 68 %.
From the question, The cumulative frequency of students who earned a score of 20 or lower on the quiz is:
= 4+8+15+7
=34.
Total frequency is:
= 4+8+15+7+7+3+4+2
=50.
Therefore, the relative cumulative frequency is:
= 34/50
= 0.68
= 68%
Hence, The cumulative frequency of students who earned a score of 20 or lower on the quiz is option d) 68.
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Answer:
4/ 5 x 2^x
Step-by-step explanation:
2^x +4-2^x / 5^2
First we multiply everything by 5^2/5^2
2^x + 4-2^x (5^2x) / (5^2)(5^2)
= 2^x + 4-2^x 5^2x we see 2 x 5^2
= 2^x+4-2 x 5^2x +5^2x / (5^2)(5^2x) 2^x cancels with 2^x as subtraction and 5^2x base cancels with top also
= 4/ 5 x 2^x
Alright, lets get started.
The ages of all four sisters will be = x, x+2, x+4, x+6
As per given in question, two times of youngest sister age exceeds the oldest sister age by 30 means
Simplifying the equation
So this is the age of youngest sister.
So, age of oldest sister will be 
Hene the age of oldest sister is 42 years. : Answer
Hope it will help :)
Answer:
The answer is 3
Step-by-step explanation:
I assume the way it's written is like this
4x^2 - 8x + 4 - (2x^2 - 3x + 7)
If that's the case, just combine like terms.
Let's begin with 4x^2. It has the same components as the -2x^2 (remember, since it's being subtracted in the original equation, the number is negative.)
4x^2 - 2x^2 = 2x^2
Now -8x and 3x (be careful, sometimes there's a minus sign in and out of the parentheses, this makes the number positive again
-8x + 3x = -5x
And then 4 and -7
4 - 7 = -3
So the simplified version is finally:
2x^2 - 5x - 3
Hope this helped! If you need me to explain anything, don't be afraid to ask.
