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2 years ago

Please I need help!!

Mathematics

1 answer:

Gelneren [198K]2 years ago

3 0

1 plus to the negative Peter plus the relative integers

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Simplify the following expression: 3n-6+7y+5n

stepan [7]

Answer:

8n-6=7y=5n

Step-by-step explanation:

combine like terms

6 0

2 years ago

Professor Liu gave the same quiz to the students in her morning class and in her afternoon class. The average (arithmetic mean)

natka813 [3]

Answer:

Afternoon class has more students.

Step-by-step explanation:

Let m be the number of students in the morning class and n be the number of students in the afternoon class.

The average score for the students in the morning class was 80, then the sum of their scores is $80m.$

The average score for the students in the afternoon class was 86, then the sum of their scores is $86n.$

The sum of the scores of both classes is

$80m+86n$

and the average score is

$\dfrac{80m+86n}{m+n}$

The average (arithmetic mean) score for the two classes combined was 84, then

$\dfrac{80m+86n}{m+n}=84\\ \\ 80m+86n=84m+84n\\ \\86n-84n=84m-80m\\ \\2n=4m\\ \\n=2m$

This means n is greater, so afternoon class has more students.

7 0

2 years ago

X(x+1)+(x+1)(x+2)+(x+2)(x+3) solve the equation for x

viva [34]

Answer:

3x²+9x+8

Step-by-step explanation:

x²+x+x(x+2)+1(x+2)+x(x+3)+2(x+3)

x²+x+x²+2x+x+2+x²+3x+2x+6

x²+x²+x²+x+2x+x+3x+2x+2+6

3x²+9x+8

4 0

2 years ago

Read 2 more answers

Harry reads that a particular element has an atom with a mass of 0.000000000012 grams. What is the weight of the atom expressed

Arlecino [84]

1.2 e⁻¹¹

Because you need a number between 1 and 10 for scientific notation. So you move the decimal over 11 places. Since you move it to the right, it becomes a negative exponent.

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2 years ago

How to do domain and range

Ann [662]

A domain is a set of all first elements of ordered pairs (x-coordinates) The range is the set of second elements of ordered pairs (Y-coordinates) Domain and range can be seen clearly on the graphic

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2 years ago