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3 years ago

* For x = 3, evaluate the following: (2x)?

Mathematics

2 answers:

Kay [80]3 years ago

8 0

Answer:

Step-by-step explanation:

If x=3 then substitute the x in (2x) to 3.

So it should look like this:

(2(3))

Which means you need to multiply 2 x 3

Answer: 6

Vera_Pavlovna [14]3 years ago

6 0

Answer:

6is answer

x=3

2x=2×3=6

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a model of a car is amde to a scale of 1:40. the volume of the model is 45cm^3. calcualte the volume of the car. give your answe

spin [16.1K]

The volume of the car is 1800cm^3 which is equivalent to 0.0018m^3

<h3>Scale modelling</h3>

Given the scale factor that model of a car is amde to a scale of 1:40, Giving that the model as 45cm^3, this means that;

1 = 45cm^2

Determine the volume of the car

40 = x

Find the ratio

1/40 = 45/x

x = 40*45

x = 1800cm^3

x = 0.0018m^3

Hence the volume of the car is 1800cm^3 which is equivalent to 0.0018m^3

Learn more on scale factor here; brainly.com/question/25722260

#SPJ1

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2 years ago

A scale has a percent error of 7% the scale reads the mass of a book as 450 g.

Bess [88]

B, is the correct answer.
7% of 450 is 31.5
We add 31.5 to 450 to find out highest possible error, and subtract 31.5 from 450 to find out lowest possible error.

3 0

3 years ago

Read 2 more answers

Debras fish tank 16 liters of water in it. She plans to add 4 liters per minute until the tank has more than 60 liters. What are

yarga [219]

Debras fish tank 16 liters which mean she have 80 liter

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3 years ago

A motorcycle travels north along

Sindrei [870]

Answer:

42 mph

Step-by-step explanation:

From 2 p.m. to 6 p.m. 4 hours passed, so the truck and the motorcycle were on the road for 4 hours until they met.

Motorcycle in 4 hours at a constant speed of 45 mph travelled

$45\cdot 4=180\ miles$

The distance between the motorcycle and the truck is 348 miles, so the truck travelled

$348 -180=168\ miles$

If x mph is truck's speed, then

$168=4\cdot x\\ \\x=\dfrac{168}{4}=42\ mph$

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4 years ago

Here is a better picture

Sonja [21]

Answer:all

Step-by-step explanation:so because u have done all

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2 years ago