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Daniel [21]
3 years ago
10

Convert 3 1/4 into a decimal

Mathematics
2 answers:
IRISSAK [1]3 years ago
6 0
1/4 is 0.25 so it would be 3.25
kifflom [539]3 years ago
3 0
Well we know that 3 is our whole number and 1/4 is what comes after our decimal.. 

If 1/4 = 0.25 
And 3 = 3.00

Then add those together. 
  3.00
+0.25 
*******
  3.25 

So your answer is 3.25 

Good Luck! :)
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In ΔXYZ, x = 27 cm, y = 79 cm and ∠Z=142°. Find the length of z, to the nearest centimeter.
Annette [7]

The value of side z will be equal to 99.32 cm.

<h3>What is trigonometry?</h3>

The branch of mathematics sets up a relationship between the sides and the angles of the right-angle triangle are termed trigonometry.

Given that:-

In ΔXYZ, x = 27 cm, y = 79 cm and ∠Z=142°

So by applying the formula given below:-

z²   =   x²  +  y²  -  2xyCos(142)

z²   =   79²  +   27²   -  2 ( 79 x 27  x  Cos142  )

z    =    99.32  cm

Hence the value of side z will be equal to 99.32 cm.

To know more about Trigonometry follow

brainly.com/question/24349828

#SPJ1

6 0
2 years ago
How many triangles can be constructed with angles measuring 80 degrees , 80 degrees and 40 degrees
daser333 [38]

Answer:

None

Step-by-step explanation:

The angles inside a triangle add to 180. If the angles are 80, 80 and 40, then they must add to 180 to form a triangle.

80+80+40 = 200

This can't be a triangle.


5 0
3 years ago
The ratio of girls to boys
amm1812

Answer:

36girls

Step-by-step explanation:

3/1*12=36. To check 36/12=3/1=3:1

6 0
2 years ago
What is the differentiation of 2cos2x
garri49 [273]

2cos2x=y

dy/dx(2cos2x)=-4sin2x

d/du cosu= u'×cos'u=-u'×sinu

d/du sinu= u'×sin'u= u'×cosu

d/du tanu = u'×(1+tan²u)

d/du cotu = u'×-(1+cot²u)

proof for cosu :

cos2x= 1-2sin²x

or 2cosx²-1

or cos²x-sin²x

we will one of this fro example let's take the first one

d/dx 1-2sin²x=0-2×2(sinx)×cosx=-2sin2x

and we have 2 in the begining so its -4sin2x

3 0
3 years ago
Just need the answer guys please
Mkey [24]
The first problem’s answer is true. (P.S. If you don’t understand this type of problems then plug in variables for them. It helps check your answer and solve them too.)

The second problem’s answer is false.

First of all, I plugged in for the variable a to be 6 for the first problem. Second, I plugged in numbers for the variables and x was 5 and x was 2 for the second problem. You can check the steps in the image I took. (P.S. You can use the MathPapa calculator online to solve these problems and plug in the variables.)

(I couldn’t upload the second problem’s step by step sorry, but if you need it then just use the MathPapa calculator by plugging in numbers for the variables.)

5 0
4 years ago
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