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adoni [48]
2 years ago
11

Parents of students at a middle school

Mathematics
2 answers:
Rasek [7]2 years ago
7 0
The answer is B 319 parents
Contact [7]2 years ago
6 0

Answer:

<em>(B). 319 </em>

Step-by-step explanation:

\frac{42}{60} = \frac{x}{456}

\frac{7}{10} = \frac{x}{456}

x = \frac{7*456}{10} ≈ <em>319</em>

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An airplane can travel 365mph in still air. If it travels 2716 miles with the wind in the same length of time it travels 2394 mi
Anestetic [448]

Answer: the speed of the wind is 365 mph

Step-by-step explanation:

Let x represent the speed of the wind.

An airplane can travel 365mph in still air. If it travels 2716 miles with the wind, it means that its total speed while flying with the wind is (365 + x) mph.

Time = distance/speed

Time spent in flying with the wind is

2716/(365 + x)

In the same length of time, it travels 2394 miles against the wind. it means that its total speed while flying against the wind is (365 - x) mph.

Time spent in flying against the wind is

2394/(365 - x)

Since the time is the same, it means that

2716/(365 + x) = 2394/(365 - x)

Cross multiplying, it becomes

2716(365 - x) = 2394(365 + x)

991340 - 2716x = 873810 + 2394x

2394x + 2716x = 991340 - 873810

5110x = 1865150

x = 1865150/5110

x = 365 mph

5 0
3 years ago
Can somebody plz help answer all the questions correctly thanks !
KiRa [710]

Answer:

what questions? I dont see any

6 0
3 years ago
Read 2 more answers
What is the answer to this equation?
Maurinko [17]
So I’ll do question 3. So normally you see f(x)= something plus x (something like that) you see it as a function of x.

So that notation of f(-1) means the function of -1. Which means you need to sub in -1 for x.

f(x)=-5x+5
f(-1)=-5(-1)+5
Negative times a negative is a positive
f(-1)=5+5
f(-1)=10
6 0
3 years ago
The sum of the measures of the interior angles of a polygon with n sides is __.
melisa1 [442]

Answer: The sum of the measures of the interior angles of a polygon is always 180(n-2) degrees, where n represents the number of sides of the polygon. The sum of the measures of the exterior angles of a polygon is always 360

8 0
2 years ago
Read 2 more answers
A sample of an unknown liquid has a volume of 24.0 mL and a mass of 6 g. What is its density?
Furkat [3]

Answer:

Hey there!

Density = Mass/Volume

Mass= 6g

Volume=24 mL, which is 24 cm^3

Density= 6g/24 cm^3

Density=0.25 g/cm^3

Let me know if this helps :)

5 0
3 years ago
Read 2 more answers
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