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3 years ago

Claudio needs to simplify the expression below.

Mathematics

2 answers:

Dmitrij [34]3 years ago

8 0

All purpose calc.com one with the words on the web with a smiley calc type only the problem in no words

Oksana_A [137]3 years ago

4 0

Answer:

The correct option is 1.

Step-by-step explanation:

The given expression is

$3.5\times 2+9(7.1+0.5)+4$

To solve these type of expressions we have a rule that is known as BODMAS.

BODMAS = brackets of division, multiplication, addition, subtraction.

It defined the order of calculations. It means first we have solve the brackets, then division, then multiplication, after that addition and last subtraction.

So according to BODMAS, Claudio should simplify the bracket first.

The bracket of given expression is (7.1+0.5).

The simplification of given expression is shown below.

$3.5\times 2+9(7.6)+4$ (Brakets)

$7+68.4+4$ (Multiplication)

$79.4$ (Addition)

Therefore he will solve (7.1+0.5) first. So, option 1 is correct.

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If a car has tires with a diameter of 28 inches and is traveling at 55 mph, how fast are its tires spinning, in rpm^ prime s (re

Aleksandr-060686 [28]

Answer:

The tires are spinning at 660.49 revolutions per minute.

Step-by-step explanation:

The speed of the tires (v) is the same that the speed of the car, so to find the angular velocity of the tires we need to use the equation:

$\omega = \frac{v}{r}$

Where:

r: is the radius of the tires = d/2 = 28 inches/2 = 14 inches

$\omega = \frac{55 mph}{14 inches*\frac{1 mile}{63360 inches}} = 2.49 \cdot 10^{5} \frac{rad}{h}*\frac{1 h}{60 min}*\frac{1 rev}{2\pi rad} = 660.49 rpm$

Therefore, the tires are spinning at 660.49 revolutions per minute.

I hope it helps you!

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3 years ago

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3 years ago

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Answer:

Please look at the attachment for step by step guide and solution.