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3 years ago

12

There are 42 children in the classroom each student will get 28 pencils and 46 erasers how many pencils will the teacher have to

give out. P.S. i messed up on the last question

2 answers:

Aleksandr-060686 [28]3 years ago

4 0

Since the question is asking how many pencils the teacher will have to give out, we can automatically ignore the 46 erasers from the problem because it is not relevant. The information was most likely put there to confuse you.

Each student is getting 28 pencils, so if we multiply the number of students by 28 pencils, we will find how many pencils the teacher will need to give out.

There are 42 children in the classroom, so multiply 42 by 28.

42 * 28 = 1,176

The teacher will have to give out <u>1,176 pencils</u> to her 42 children in the classroom.

ser-zykov [4K]3 years ago

3 0

There are 42 children in the classroom. Each student gets 28 pencils. All you have to do is multiply 42 by 28.

The phrase "and 46 erasers " is mentioned to trick, or confuse you. That part doesn't matter.

Now multiply 42 by 28

$42 \times 28 = 1,176$

The teacher will have to give out 1,176 pencils.

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Because of the symmetry of quadratics (which is the case here because we have two factors of degree 1, so we are dealing with a <em>polynomial</em> of degree 2, which is a fancy way of saying that something is a quadratic), the $x$ -coordinate of the extremum (a fancy way of saying maximum or minimum) is the (arithmetic) average of the two roots.

In the factored form of a quadratic function, we can immediately read the roots: 3 and 7. Another way to see that is to solve $(x-3)(x-7)=0$ , which gives $x-3=0 \vee x-7=0$ (the 'V' stands for 'or'). We can take the average of the two roots to get the $x$ -coordinate of the minimum point of the graph (which, in this case, is $x=\frac{3+7}{2} = \frac{10}{2} = 5$ ).

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Answer:

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This graph displays the change in wage per years of service. Since the slope is positive, this means the wage has a positive growth.

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Step-by-step explanation:

Number 7:

Step 1: Identify the points on the line to use for slope formula.

The two points are (2, 11) and (6, 17).

$x^1$ and $y^1$ will be $(2,11)$

$x^2$ and $y^2$ will be $(6, 17)$

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Step 3: Subtract.

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Step 4: Simplify.

improper fraction: $\frac{3}{2}$

mixed number: $1\frac{1}{2}$

decimal: $1.5$

Number 8:

Step 1: Identify the points on the line to use for the slope formula.

The two points are (3, 1200) and (6, 800)

$x^1$ and $y^1$ will be $(3,1200)$

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Step 2: Plug in points into slope formula.

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Step 3: Subtract.

$m=\frac{-400}{3}$

Step 4: Simplify.

Cannot be simplified further.

mixed number: $m=\frac{-400}{3}$

decimal: $133.333333333$

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