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3 years ago

How do you solve this equation: 80x =

Mathematics

1 answer:

Pepsi [2]3 years ago

7 0

Answer:

Divide by 80 on both sides

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If f (x) = {(4 – 1), then what is f (2)?<br> f(2)=

Bumek [7]

Steps to solve:

f(x) = 1/2(4 - x) when x = 2

~Substitute

f(2) = 1/2(4 - 2)

~Subtract whats in parenthesis

f(2) = 1/2(2)

~Multiply

f(2) = 1

Best of Luck!

3 0

3 years ago

Read 2 more answers

A plane traveled 240 miles. The trip was with the wind. It took 3 hours. The trip back was into the wind. The trip back took 6 h

sveta [45]

Answer:

Plane speed is 60 miles/hour

Wind speed is 20 miles/hour

Step-by-step explanation:

Lets suppose the speed of the plane in still air is s and speed of the wind is w and since speed in the formula below equals speed of the plane plus the wind's speed so speed=s+w for this journey with the wind

$Speed=\frac{Distance}{Time}$

$Distance=Speed*Time$

For the first journey the trip with the wind:

$Distance=Speed*Time\\240=(s+w)(3)\\240/3=s+w\\s+w=80$

Here we got our first equation for the second equation we use the information from the second trip which was into the wind. Which means the speed here would be speed=s-w

$Distance=Speed*Time\\240=(s-w)*6\\240/6=s-w\\s-w=40$

so now we got our two equations adding both equations would result into the following:

$s+w=80\\s-w=40\\2s=120\\s=60$

so speed of the plane is 60 miles/hour put the value of s in any our two equations to calculate the wind speed, lets take the first equation:

$s+w=80\\60+w=80\\w=80-60\\w=20$

so the wind speed is 20 miles/hour

8 0

3 years ago

The students were asked how they get to school each day.

Mumz [18]

The answer is 5/13.

Walking(7) + Biking(3) = 10 students
10 students out of 26 total students = 10/26
Simplified is 5/13

6 0

3 years ago

Read 2 more answers

Idek how to start please help

sp2606 [1]

First, note that x+21 and 3x+9 are "complementary angles;" they add up to 90 degrees. Thus, 4x + 30 = 90 degrees, so that 4x = 60 degrees, and x = 15 degrees.

6 0

3 years ago

Sam kayaks on a river near his home. He plans to kayak a total of 6.4 miles. Sam kayaks at an average speed of 1.6 miles per hou

OleMash [197]

Answer: it will only take jime 30 min

Step-by-step explanation:

3 0

3 years ago