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3 years ago

What is the surface area of a cube that has edges 3 cm long

Mathematics

2 answers:

Bezzdna [24]3 years ago

4 0

Answer:

Step-by-step explanation:

multiply 3 by 3 to get the surface area of one of the squares that make up a cube. then since a cube has 6 sides multiply the result (9) by 6 in order to get 54

dimulka [17.4K]3 years ago

3 0

Answer:

9cm^2

Step-by-step explanation:

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The legs of a right triangle measure 7 and x. The<br> hypotenuse measures 25. Determine the value x

777dan777 [17]

According to Pythagoras :

The square of hypotenuse is the sum if the square if the two other side

so : 7^2 + X^2 = 25^2

49 + X^2 = 625

X^2 = 625-49

X^2 = 576

this equation as two roots . As a triangle cannot have a negative side value, I will only take positive value

so X = V576 =24

3 0

3 years ago

Victoria earns $255 by working 20 hours each week

Alborosie

She would make $98.50 in 10 hours.

Explanation :
255/20 = 12.75
12.75 - 2.90 = 9.85
9.85 x 10 = 98.50

6 0

3 years ago

what are the steps to solve 3.5(c-8)+c=12.5? I already went on a different website and found out the answer is nine. I plugged i

LekaFEV [45]

3.5(c-8)+c = 12.5
⇒ 3.5c- 3.5*8+ c= 12.5 (distributive property)
⇒ (3.5c+ c) -28= 12.5
⇒ 4.5c= 12.5+ 28
⇒ 4.5c= 40.5
⇒ c= 40.5/ 4.5
⇒ c= 9

The correct answer is 9~

7 0

3 years ago

2) As part of traffic accident investigations, the speed of a car involved can be approximately determined by checking actual sk

dezoksy [38]

a) The speed of car was 60 mph.

b) The speed of car was 45 mph.

Step-by-step explanation:

Given,

a = actual skid marks

p = test skid marks

Formula;

$s=30*\sqrt{\frac{a}{p}}\\$

a) a = 144 feet, p = 36 feet

Putting in formula;

$s = 30*\sqrt{\frac{144}{36}}\\\\s=30*\sqrt{4}\\\\s=30*2\\\\s=60$

The speed of car was 60 mph.

b) a = 153 feet, p = 68 feet

Putting in formula;

$s=30*\sqrt{\frac{153}{68}}\\\\s=30*\sqrt{2.25}\\\\s=30*1.5\\\\s=45$

The speed of car was 45 mph.

Keywords: substitution, speed

Learn more about substitution at:

#LearnwithBrainly

4 0

3 years ago

can anyone provide me a link for add maths igcse textbook 2nd edition exercise answers?? please its urgent

Alex73 [517]

Answer:

yes

Step-by-step explanation:

come with your money

8 0

3 years ago

What is the surface area of a cube that has edges 3 cm long￼

What is the surface area of a cube that has edges 3 cm long