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Evgen [1.6K]
3 years ago
12

Find the height of an equilateral triangle whose side measures 56 cm​

Mathematics
2 answers:
pychu [463]3 years ago
5 0

Answer:

48.5 cm

Step-by-step explanation:

For this you can use the Pythagorean theorem. You know that your hypotenuse will be 56 cm, and one side will be half of that, 28. This sets up the equation:

a^2+28^2=56^2

So, a^2 is 2,352

And a, rounded to the nearest hundredth, is 48.5 cm

Hope this helps :)

user100 [1]3 years ago
3 0

Answer: 48.5

Step-by-step explanation:

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I need to know the answer and how to get it
sergejj [24]
The answer is 5+b, so when b= 14.99, then 5+14.99=$19.99
hope this helps! 

5 0
3 years ago
When three times the sum of a number and seven is increased by ten, the result is four. What is the number ?
densk [106]

Answer:

x=9   :))

Step-by-step explanation:

First set up your equation.

"3 times" is multiplication

"THE SUM of A NUMBER and seven" that is parenthesis because of the multiplication before it

"is increased by ten" that is an addition at the end

Now we have 3(x+7)+10=4

Solve your equation!

Distribute the 3 now we have 3x+21+10=4

Add like terms

now it should look like this... 3x+31=4

Subtract 31 from both sides and it looks like...

3x=27

Divide by the x-value

x=9

4 0
4 years ago
Find a number so that 97.3% of it is 36
tiny-mole [99]
So x is the number
x time 97.3%=36
percent measn parts out of 100 so
97.3%=97.3/100=9.73/10=0.973/1=0.973
x times 0.973=36
divide both sides by 0.973
x=36.9989...
answer is aprox 36.9
7 0
3 years ago
PLEASE HELP!!! PLEASE SHOW ALL OF YOUR WORK!!!
Elza [17]
The answer is c bc I just know
8 0
3 years ago
Read 2 more answers
A rectangle has an area 18sq cm.id its length and width are wjole numbera.what is its greatest possible perimeter
makkiz [27]

Answer:

38cm

Step-by-step explanation:

1. The perimeter of a square can be found with the formula2 \times (width + length)

2. Since its length and width are whole numbers, it must be either

1 x 18,

2 x 9 or

3 x 6

3. Using the formula in step 1, we can found that the perimeter in these cases are

38

22

18

respectively

4. Compare those perimeter we found in previous step, it's obvious that the greatest is 38. Solved.

3 0
3 years ago
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