Answer:
7.5(3(7) + 4)= 187.5
Step-by-step explanation:
Answer:
you would be dead
Step-by-step explanation:
Answer:
The range in which 90% of class will fall will be (40.2,89.67)
Step-by-step explanation:
Since the grades are normally distributed to obtain most possible range of grades obtained by the class we shall find the range of marks that give an area of 90% distributed equally about mean
These numbers shall correspond to
The simplified equation of 7y + 8 = 9 + 3y + 2y is 2y = 1
<h3>How to simplify an equation?</h3>
The equation can be simplified as follows:
7y + 8 = 9 + 3y + 2y
We have to combine like terms
Hence,
7y + 8 = 9 + 3y + 2y
7y + 8 = 9 + 5y
subtract 5y from both sides
7y - 5y + 8 = 9 + 5y - 5y
2y + 8 = 9
Let's subtract 8 from both sides
2y + 8 - 8 = 9 - 8
2y = 1
Therefore, the simplified equation of 7y + 8 = 9 + 3y + 2y is 2y = 1
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Hence, the numbers are 16 and 4
<u>Further Explanation:</u>
First of all we have to make the equations from the word problem.
Let x be the first number and y be the second number.
Then,
The sum of two numbers is 20 => x + y = 20 => Eqn 1
The difference between three times the first number and twice the second is 40 => 3x-2y = 40 => Eqn 2
The numbers can be verified:
As the equation is verified by the values of x and y.
Hence, the numbers are 16 and 4
<u>Keywords:</u> Linear equations, Substitution method to solve equations
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