3 years ago

Matemática pls ajudem

Mathematics

2 answers:

balandron [24]3 years ago

5 0

I wanna help but i dont know that langue

OlgaM077 [116]3 years ago

5 0

What language is this?

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On a particular day, the wind added 5 miles per hour to Alfonso's rate when he was cycling with the wind and subtracted 5 miles

sattari [20]

speed with no wind = s

speed with wind = s + 5

speed against wind = s - 5

time = t

speed = distance/time

distance = speed * time

With wind, time = t, speed = s + 5, distance = 50

50 = (s + 5)t

Against wind, time = t, speed = s - 5, distance = 30

30 = (s - 5)t

t = 30/(s - 5)

50 = (s + 5) * 30/(s - 5)

50(s - 5) = (s + 5) * 30

50s - 250 = 30s + 150

20s = 400

s = 20

Answer: 20 mph

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4 years ago

You are given a problem that involves multiplying a positive number and a negative number. Which of the following are reasonable

crimeas [40]

First question:. A and D. Second question: B and C .

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3 years ago

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Joe is a waiter at a local pizza parlor. He usually gets a tip from the table he waits on. The bill for one table comes to $34.

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38 divided by x% equals=

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3 years ago

An experiment involves 16 participants. From these, a group of 4 participants is to be tested under a special condition. How man

zheka24 [161]

Answer:

43,680 ways.

Step-by-step explanation:

We have been given that an experiment involves 16 participants. From these, a group of 4 participants is to be tested under a special condition. We are asked to find the number of groups of 4 participants that can be chosen, assuming that the order in which the participants are chosen is irrelevant.

We will use permutations formula to solve our given problem.

$^nP_r=\frac{n!}{(n-r)!}$