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2 years ago

50 POINTSS MORE !!!!!

Mathematics

1 answer:

Andreas93 [3]2 years ago

6 0

The time it will take for the block of ice to melt if the temperature is 45 degrees is 3 hours.

The cost to travel 22 miles is 55 dollars.

let

time it takes for ice to melt = x

air temperature = y

Therefore,

x ∝ 1 / y

x = k / y

when x = 2.5 hours and y = 54 degrees

Hence,

k = 2.5 × 54

k = 135

The time it will take for the block to melt at 45 degrees = 135 / 45 = 3 hours

<h3>How to find equation that relates the cost to the number of miles?</h3>

It costs $35 for a ride from the city centre to the airport, 14 miles away.

where

c = cost

m = number of miles

Therefore, the equation is as follows:

35 / 14 = 2.5

c = 2.5m

Hence, when you travel 22 miles,

c = 22(2.5)

c = 55 dollars

learn more on equation here: brainly.com/question/22737982

#SPJ1

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. How many strings are there of lowercase letters of length four or less, not counting the empty string

lesantik [10]

<h3>Answer: 475,254</h3>

This is one single number and not two separate numbers.

Delete the comma if your teacher requires it.

=========================================================

Explanation:

I'm assuming letters can repeat.

There are 26 letters in the English alphabet.

There are,

A = 26^4 = 456,976 strings of length four
B = 26^3 = 17,576 strings of length three
C = 26^2 = 676 strings of length two
D = 26 strings of length one

Overall, there are A+B+C+D = 456,976+17,576+676+26 = 475,254 strings of length four or less.

3 0

2 years ago

Which of the following is not a valid probability?

Marta_Voda [28]

Answer:

Step-by-step explanation:

Probability cannot be greater than 1 so the answer is D.

8 0

3 years ago

Please help, thanks!

Mamont248 [21]

((-4x^3)(y^4))^-3
--------------------------
(2xy^4)^-4
16x^4y^16
=------------------------
-64x^9y^12
-16y^4
=------------------------
64x^5
-y
=------------------------
4x^5

So the final answer is:

-y^4
-------
4x^5

(Btw if "^" is in front of a number, that means it is an exponent, so when your writing this on paper, just write it as a regular exponent without the "^". I had to do that since I'm on a computer.)

Hopefully this was helpful in some way.

7 0

4 years ago

What that two numbers when multiplied give 600 and when added give 59

ozzi

Answer:

Step-by-step explanation:

Let the 2 numbers be x and y

From the problem we have that

x * y = 600 and x + y = 59

From x + y = 59 -> x = 59 - y

Plug x = 59 - y to x * y = 600 we have

(59 - y) * y = 600

-> 59y - y^2 = 600

-> -y^2 + 59y - 600 = 0

-> y = $(59 - \sqrt{1081})/2$ or $(59 + \sqrt{1081})/2$

Then we could plug the answers in and find x because x = 59 - y

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3 years ago

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Bezzdna [24]

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5 0

4 years ago