MATHEMATICS MIDDLE SCHOOL

A rectangle has a perimeter of 80 inches. Write an equation to represent the area A in terms of width w. Do I use the perimeter?

Answers

Answer 1

Answer:

Answer:

$A = 40w-w^2$

Step-by-step explanation:

We are given the following in the question:

Perimeter of rectangle = 80 inches.

Let l be the length and w be the width of rectangle.

Perimeter of rectangle =

$P= 2(l+w)$

Putting values, we get,

$80 = 2(l+w)\n40 = l+w\n\Rightarrow l = 40 - w$

Now, we have to find the area of the rectangle in terms of w.

Area of rectangle =

$A = l* w$

Putting values, we get

$A = (40-w)w\nA = 40w-w^2$

is the required expression of area of rectangle in terms of w.

Yes, the perimeter is used to calculate the length of the rectangle in the term of w.

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How much sides do a hectagon has

Answers

If you meant "heptagon" then that would be seven sides. If this is not the answer you were looking for or you may want help with other shapes then go to goo.gl/5f4yYn

Im assuming that you meant heptagon, i dont really think that there is such thing named hectagon.
But if you are looking for heptagon, it has 7 sides.

On the average, a certain light bulb is supposed to last 450 hours. If itcan expect to finish reading during the life of the bulb?

Answers

Answer:

72 novels

Step-by-step explanation:

A number of assumptions are involved regarding operating environment, utilization fraction, and probability of failure as a function of time. The precise meanings of the words "average", "supposed to last", "maximum", and "expect" are involved. The details are too arcane to go into here.

(450 hours)/(6 1/4 hours/novel)

= (450/(25/4)) novels

= (450*4/25) novels

= 72 novels

Five dollars is what quarters

Answers

the awnser is 20 quarters

Jane,Andre,and Maria pick apples. Andre picks three times as many pounds Maria. Jane picks two times pounds as Andre. The total weight of apples is 840 pounds. How many pounds of apples does Andre pick?

Answers

Andre picked up almost 253 pounds of apples from a total of 840 pounds.

What is Equation Modelling?

Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem.

Given are Jane, Andre, and Maria. All of them are picking apples such that Andre picks three times as many pounds as Maria. Jane picks two times pounds as Andre and the total weight of apples is 840 pounds

Assume that Maria took (x) pounds of apples.

Then, Andre will pick (3x) pounds of apples.

Finally, Jane will pick up (6x) pounds of apples.

The total weight of apples is 840 pounds.

Therefore, we can model the situation as follows -

x + 3x + 6x = 840

10x = 840

x = 84

So, Maria took 84 pounds of apples.

Now, the apples picked up by Andre = 3x = 3 x 84 = 252 pounds of apples

Therefore, Andre picked up almost 253 pounds of apples from a total of 840 pounds.

To solve more questions on Equation modelling, visit the link below-

brainly.com/question/708897

#SPJ2

Andre picks 252 pounds of apples.

Further explanation:

Jane, Andre and Maria pick apples such that the apples picked by Jane are denoted by J, the apples picked by Andre are denoted by A and the apples picked by Maria are denoted by M.

The total weight of apples is 840 pounds.

Therefore, this can be written as,

${\text{J + A + M}} = 840$ ...... $(1)\n$

Andre picks three times as many pounds Maria then . ${\text{A=3M}}$ .

Jane picks two times pounds as Andre then . $J = 2A$ .

Substitute 3M for A in the equation $J = 2A$ to obtain relation between J and M as,

$\begin{aligned}{\text{J}}&={\text{2A}}\n&= {\text{2}}\cdot{\text{3M}}\n&={\text{6M}}\end{aligned}$

Now, substitute 3M for A and 6M for J in equation (1) then we get,

$\begin{aligned} {\text{6M + 3M + M} &= 840}\n{\text{10M}& = 840}\n{\text{M}& = 84}\n\end {aligned}$

Therefore, Maria picks 84 pounds of apples.

Substitute the obtained value of $M$ as 84 in equation $J = 2A$ as,

$\begin{gathered}{\text{J}}={\text{6}}\cdot {\text{84}}\n={\text{504}}\n\end{gathered}$

Therefore, Jane picks 504 pounds of apples.

Substitute the obtained value of $M$ as 84 in equation $J = 6M$ as,

$\begin{gathered}{\text{A}}={\text{3}}\cdot {\text{84}}\n={\text{252}}\n\end{gathered}$

Therefore, Andre picks 252 pounds of apples.

Thus, the total quantity that Andre picks is $\boxed{{252}\text{ } \text{pounds}}$ .

Learn more:

1. Learn more about the equation of the circle brainly.com/question/1952668

2. Learn more about the center and radius of circle equation brainly.com/question/9510228

3. Learn more about general form of the equation of the circle brainly.com/question/1506955

Answer details:

Grade: Middle school

Subject: Mathematics

Chapter: Linear equations

Keywords: Linear equations, function, sets, real numbers, ordinates, abscissa, interval, open interval, closed intervals, semi-closed intervals, semi-open intervals, graph.

How to divide 25.0 divided by 29.4

Answers

25.0divided by 29.4= 0.8503401 I hope this helps :)

In one year Angelica's height went from 40 to 43 inches. What was the percent of increase in angelica's height ?

Answers

43 -40= 3

3/40*100%= 7.5%

The final answer is 7.5%~

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