A train travels 82 kilometers in 2 hours, and then 83 kilometers in 2 hours. What is its average speed?

Help?? Thanks if you do

Mariana [72]

Answer:

l = 6 $a^{4}$ + 2a - 1

Step-by-step explanation:

the area (A) of a rectangle is calculated as

A = lw ( l is the length and w the width )

given A = 18 $a^{5}$ + 6a² - 3a and w = 3a , then

3aw = 18 $a^{5}$ + 6a² - 3a ( divide each term by 3a )

w = $\frac{18a^{5} }{3a}$ + $\frac{6a^2}{3a}$ - $\frac{3a}{3a}$ = 6 $a^{4}$ + 2a - 1

6 0

3 years ago

Custom drapes are being fitted for a large circular window. It is difficult to get these measurements, but the window has an 8 f

Arlecino [84]

Answer: 10 ft.

Step-by-step explanation:

Given: Custom drapes are being fitted for a large circular window.

The window has an 8 ft horizontal shelf with a 2 ft brace that sits in the frame.

Since the brace is extended upward, it would go through the center of the shelf and the circle.

Then the diameter of the circle= the measurement og f horizontal shelf + measurement of brace=8+2=10 ft

Hence, the diameter of the window =10 ft.

6 0

3 years ago

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Calculate the volume of a cube with side length of 7mm.

olga nikolaevna [1]

Answer:

${7}^{3} = 7 \times 7 \times 7 = 147 {m}^{3} \\ to \: calculate \: the \: volume \: of \: a \: cube \: we \: need \: to \: use \: this \: formula \\ {x}^{3} \\ x = side \: length$

4 0

3 years ago

a book store cost $80 a day to keep open, and it spends $15 for each book that it sells. if each book sells for $23, what is the

aalyn [17]

The break even point for this book store is 10

Solution:

Given that, book store cost $80 a day to keep open, and it spends $15 for each book that it sells

Cost to open the book store = $ 80

The formula for solving the break even point (BEP) is:

$BEP = \frac{\text{Fixed cost}}{\text{Selling price - variable cost}}$

Fixed Cost is the cost that remains constant whether the services provided or products sold increases or decreases

Variable Cost is the cost that varies or differs in proportion to the products or services produced, whether they increased or decreased

In this problem,

Fixed cost = $ 80

Selling price = $ 23

Variable cost = $ 15

Therefore,

$BEP = \frac{80}{23-15}\\\\BEP = \frac{80}{8}\\\\BEP = 10$

Thus break even point for this book store is 10

In order for the bookstore to continue its business, it should sell at least 10 books to meet its $80 cost

6 0

4 years ago

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I need help with this question.

marshall27 [118]

That seems so hard, sending prayers and brain cells to you.

3 0

3 years ago