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2 years ago

Find the value of x help me pls

Mathematics

2 answers:

goldenfox [79]2 years ago

6 0

Answer:

x=12

Step-by-step explanation:

Since the angle needs to add up to 90, you will first need to subtract 30 from 90. This will leave you with 60. Next you will divide 60 by 5 which will give you 12 which is the answer.

iVinArrow [24]2 years ago

4 0

Answer:

Step-by-step explanation:

30+5x=90

(90 because it is a 90° triangle)

5x=90-30( when a + change to another side it will change to -)

5x=60( solve the 90-30=60)

x=60/5(when × change to other side it will change into ÷)( and the solve it )

x=12

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dusya [7]

Answer:

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Step-by-step explanation:

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3 years ago

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A cuboid is thrice as long as it's breadth and is 4 cm high if it's volume is 300cm² find its length and breadth and total area

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Step-by-step explanation:

v=l×b×h

300cm²=4×3x×x

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2 years ago

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3 years ago

If csc 0=8÷7 which equation represents cot 0

Dahasolnce [82]

Answer: $Cot\theta =\frac{\sqrt{15} }{7}$

Step-by-step explanation:

Since, given $cosec\theta=\frac{8 }{7}$

And we know that $Cot\theta=\sqrt{cosec^2\theta-1}$

Therefore, $Cot\theta=\sqrt{cosec^2\theta-1} = \sqrt{(8/7)^2-1}= \sqrt{64/49-1}$

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3 years ago

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John have some 50cent and 20 cent coins.The value of all the coins is $27. There are twice as many 20 cent coins as 50 cent coin

pychu [463]

Answer:

There are 60 pieces of 20 cent coins

Step-by-step explanation:

Let the number of 50 cent coins be x.

Let the number of 20 cent coins by y.

Now, we are told that value of all coins is $27.

Also, 50 cent = $ 0.5 and 20 cents = $0. 2

Thus;

0.5x + 0.2y = 27 - - - - - (eq 1)

Now, we are told that there are twice as many 20 cent coins as there are 50 cent coins. So,

y = 2x - - - - (eq 2)

Putting 2x for y in eq 1,we have;

0.5x + 0.2(2x) = 27

0.5x + 0.4x = 27

0.9x = 27

x = 27/0.9

x = 30

Thus, y = 2 * 30 = 60

Thus,there are 60 pieces of 20 cent coins

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3 years ago