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3 years ago

13

The value of Acme Stock decreased a total of $40 over the last 5 days. What integer represents the average decrease in stock val

ue each day?

1 answer:

hjlf3 years ago

6 0

Answer:

rewrwefe

Step-by-step explanation:

FFewF

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yesterday , Elsa had K baseball cards today she gave 12 away ,using K write an expression for the number of cards elsa has left

Molodets [167]

Answer:

K - 12 = X

Step-by-step explanation:

Can't really, it's an expression.

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4 years ago

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The cruising speed of a certain airplane is approximately Mach 0.68, meaning 0.68 times the speed of sound. If the speed of

Nonamiya [84]

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3 years ago

What is one way of writing 10-3?

Grace [21]

Greetings!

"10-3" can also be written as:
1) -3+10
2)10+(-3)

Hope this helps.
-Benjamin

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3 years ago

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Janaya buys a postcard from each travel destination she visits. Before starting her travels this year, Janaya had 20 postcards.

MrRa [10]

Answer:

The percentage increase in Jayana's postcard collection is 15%

Step-by-step explanation:

Jayana had 20 postcards last year

With 3 more postcards this year

From the given equation Quantity = Percent x Whole

Here;

Let P = Percent/100%

Quantity = Increment in postcard = 3 postcards

Whole = The total postcards from last year = 20 postcards

Hence,

3 postcards = P x 20 postcards

P = 3/20 = 0.15

Recall P = Percent/100%

∴ Percent = P x 100% = 0.15 x 100% = 15%

The percentage increase in Jayana's postcard collection is 15%

4 0

3 years ago

A student needs to select 3 books from 3 different mathematics, 3 different physics and 1 history books. What is the probability

Gnesinka [82]

Answer:

Probability that one of them is mathematics and other two are either physics or history books = 0.51

Step-by-step explanation:

Given - A student needs to select 3 books from 3 different mathematics, 3 different physics and 1 history books.

To find - What is the probability one of them is mathematics and other two are either physics or history books ?

Solution -

Given that,

A student needs to select 3 books from 3 different mathematics, 3 different physics and 1 history books.

So,

Total number of books = 3 + 3 + 1 = 7

The student has to select 3 books

So, Total number of ways = $^{7} C_{3}$ = 35

So,

Probability that one of them is mathematics and other two are either physics or history books is -

= $\frac{^{3} C_{1}. ^{4} C_{2} }{^{7} C_{3}}$

= $\frac{(3)(6)}{35}$

= $\frac{18}{35}$

= 0.51

⇒Probability that one of them is mathematics and other two are either physics or history books = 0.51

8 0

3 years ago