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3 years ago

What does 9 + (8 - 2 × 2) equal?

Mathematics

2 answers:

Norma-Jean [14]3 years ago

5 0

<u><em>Answer: =13. *The answer should be positive sign.*</em></u>

Step-by-step explanation:

This question it's about PEMDAS. This lesson it's about order of operations. p-parenthesis, e-exponents, m-multiply, d-divide, a-add, and s-subtract. It can also go left to right.

do parenthesis first.

2*2=4

9+(8-4)

9+4

add left to right.

9+4=13

=13

Hope this helps!

Thanks!

Have a great day!

Troyanec [42]3 years ago

5 0

The answer is positive 13

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Its -20 but how? pls helppp. ill give brainliest

MissTica

w-10=2(w+5)

w-10=2w+10

w-2w=10+10

-w=20

w=-20

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2 years ago

Read 2 more answers

1.) (-18, -20) (18, 16)

aleksandrvk [35]

1.) (-18, -20) (18, 16)

m= 1

2.) (-7, 14) (-11, 4)

m= 5/2

3.) (-5, -4) (3, 9)

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4.) (13, -8) (-9, -1)

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3 years ago

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Blizzard [7]

Answer:

1.) D

2.) B

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a.) 7x-34

b.) x (division symbol) 45 + 6

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4 0

4 years ago

The Sahara Desert has an area of approximately 9,400,400 km2. While estimates of its average depth vary, they center around 150

horrorfan [7]

It would take 65433661 years to re-create the Sahara Desert

<h3>How many years would it take to re-create the Sahara Desert?</h3>

The given parameters are:

Surface area = 9,400,400 km^2

Depth = 150 m

This means that the volume is

Volume = Surface area * Depth

So, we have

Volume = 9,400,400 km^2 * 150 m

Express as meter square

Volume = 9,400,400 * 1000000 m^2 * 150 m

Evaluate the product

Volume = 9,400,400 * 150,000,000 m^3

A small dump holds 20.5 m^3 for 30 seconds.

So, the duration is:

Time = (9,400,400 * 150,000,000 m^3)/(20.5 m^3 per 30 seconds)

Evaluate the product and quotient

Time = 2.0635024e+15 seconds

1 second = 3.171e-8 year.

So, we have:

Time = 2.0635024e+15 * 3.171e-8 year

Evaluate the product

Time = 65433661.104 years

Approximate

Time = 65433661 years

Hence, it would take 65433661 years to re-create the Sahara Desert