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maw [93]
3 years ago
9

3. 18 is 40% of what number?​

Mathematics
2 answers:
Mariulka [41]3 years ago
8 0

#Lets just write x as the nunber you asked

x × 40/100 = 18

x = 18 : 40/100

x = 18 × 100/40

y = 1800/40

y = 45

<h3>Answer : 45</h3>
DIA [1.3K]3 years ago
8 0

Answer:

45

Step-by-step explanation:

take the unknown number as z

40%=40/100

40/100×z=18

2/5×z=18. (40/100=2/5)

z=18/2×5

z=45

Hope you've understood

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Cot^2x csc^2x + 2 csc^2x –cot^2 = 2
kow [346]

Answer:

x = π/2 + πk

Step-by-step explanation:

cot² x csc² x + 2 csc² x − cot² x = 2

Multiply both sides by sin² x:

cot² x + 2 − cos² x = 2 sin² x

Add cos² x to both sides:

cot² x + 2 = 2 sin² x + cos² x

Pythagorean identity:

cot² x + 2 = sin² x + 1

Subtract 1 from both sides:

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Pythagorean identity:

csc² x = sin² x

Multiply both sides by sin² x:

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sin x = ±1

Solve for x:

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3 years ago
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kondaur [170]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
Plz help me on this
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$125.4 is the answer to #1
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