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3 years ago

Can someone help me? and answer step by step.

Mathematics

2 answers:

Angelina_Jolie [31]3 years ago

7 0

Answer:

i think its 2

Step-by-step explanation:

my teacher did this

vichka [17]3 years ago

3 0

Answer:

12.785

Step-by-step explanation:

you have to add the area of two rectangles and a quarter of a circle

the biggest rectangle size is 2 by 5, its area is then 2*5 = 10

the small one is 2 by 1, its area is 1*2 = 2

radius of the circle is 1, it's area is 1²π = 3.14 but you need only 1/4 of it so 3.14/4 = 0.785

total area is 10+2+0.785 = 12.785

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Evaluate each function for the given value

Mariulka [41]

Answer:

3) 5

5) 1

Step-by-step explanation:

substitute the value of 9 for each 'x' in the expression

3) h(9) = 2/3(9) - 1

= 18/3 - 1

= 6-1 or 5

substitute the value of 5 for each 'x' in the expression

5) f(5) = -5² + 6(5) - 4

= -25 + 30 - 4

= 5-4 or 1

7 0

3 years ago

Which side length will form an obtuse triangle with side lengths 8 and 10

Ne4ueva [31]

Answer:

Option J 13

Step-by-step explanation:

we know that

If applying the Pythagoras Theorem

$c^{2}> a^{2} +b^{2}$ ----> is an obtuse triangle

$c^{2}< a^{2} +b^{2}$ ----> is an acute triangle

$c^{2}= a^{2} +b^{2}$ ----> is a right triangle

where

c is the greater side

<em><u>Verify each case</u></em>

case F) we have

$c=10, a=6, b=8$

substitute

$10^{2}> 6^{2} +8^{2}$

$100> 100$ -----> is not true

Is a right triangle

case G) we have

$c=10, a=9, b=8$

substitute

$10^{2}> 9^{2} +8^{2}$

$100> 145$ -----> is not true

Is an acute triangle

case H) we have

$c=12, a=8, b=10$

substitute

$12^{2}> 8^{2} +10^{2}$

$144> 164$ -----> is not true

Is an acute triangle

case J) we have

$c=13, a=8, b=10$

substitute

$13^{2}> 8^{2} +10^{2}$

$169> 164$ -----> is true

Is an obtuse triangle

7 0

4 years ago

Verify the identity. cotangent of x divided by quantity one plus cosecant of x equals quantity cosecant of x minus one divided b

Elenna [48]

Answer:

$\frac{\cot x}{1+\csc x}=\frac{\csc x-1}{\cot x}$

Step-by-step explanation:

We want to verify the identity:

$\frac{\cot x}{1+\csc x}=\frac{\csc x-1}{\cot x}$

Let us take the LHS and simplify to get the LHS.

Express everything in terms of the cosine and sine function.

$\frac{\cot x}{1+\csc x}=\frac{\frac{\cos x}{\sin x} }{1+\frac{1}{\sin x} }$

Collect LCM

$\frac{\cot x}{1+\csc x}=\frac{\frac{\cos x}{\sin x} }{\frac{\sin x+1}{\sin x} }$

We simplify the RHS to get:

$\frac{\cot x}{1+\csc x}=\frac{\cos x}{\sin x+1}$

We rationalize to get:

$\frac{\cot x}{1+\csc x}=\frac{\cos x(\sin x-1)}{(\sin x+1)*(\sin x-1)}$

We expand to get:

$\frac{\cot x}{1+\csc x}=\frac{\cos x(\sin x-1)}{\sin^2 x-1}$

Factor negative one in the denominator:

$\frac{\cot x}{1+\csc x}=\frac{\cos x(\sin x-1)}{-(1-\sin^2 x)}$

Apply the Pythagoras Property to get:

$\frac{\cot x}{1+\csc x}=\frac{\cos x(\sin x-1)}{-\cos^2 x}$

Simplify to get:

$\frac{\cot x}{1+\csc x}=\frac{-(\sin x-1)}{\cos x}$

$\frac{\cot x}{1+\csc x}=\frac{1-\sin x}{\cos x}$

Divide both the numerator and denominator by sin x

$\frac{\cot x}{1+\csc x}=\frac{\frac{1}{\sin x}-\frac{\sin x}{\sin x}}{\frac{\cos x}{\sin x}}$

This finally gives:

$\frac{\cot x}{1+\csc x}=\frac{\csc x-1}{\cot x}$

8 0

3 years ago

7/16,1/2,3/8,9/32,5/16,15/32 from least to greatest

PIT_PIT [208]

Your increase is 85 dollars

6 0

4 years ago

Read 2 more answers

I need to know what is the value of x

Alina [70]

Answer: It's a secret mystery.

To discover the value of x, solve the equation

Step-by-step explanation:

Supplementry angles add to 180°

So 19° + (x-50)° = 180°

19 + x - 50 = 180

Add 50-19 to both sides

3 0

3 years ago