All categories

3 years ago

Plz I need this thank you this is for 100 points luv u

Mathematics

1 answer:

Verizon [17]3 years ago

8 0

Answer:

a. 120

b. -120

c. -120

d. -120

e. 120

Step-by-step explanation:

The amount of - will influence whether the value is positive or negative. Odd number of - is always negative. Even number of - is always positive. Hope this helped :)

You might be interested in

Which ordered pair is a solution of the equation?<br> -x- 4y = -10

Rom4ik [11]

Use Cymath !! best math app !

3 0

2 years ago

Read 2 more answers

) f) 1 + cot²a = cosec²a

notsponge [240]

Answer:

It is an identity, proved below.

Step-by-step explanation:

I assume you want to prove the identity. There are several ways to prove the identity but here I will prove using one of method.

First, we have to know what cot and cosec are. They both are the reciprocal of sin (cosec) and tan (cot).

$\displaystyle \large{\cot x=\frac{1}{\tan x}}\\\displaystyle \large{\csc x=\frac{1}{\sin x}}$

csc is mostly written which is cosec, first we have to write in 1/tan and 1/sin form.

$\displaystyle \large{1+(\frac{1}{\tan x})^2=(\frac{1}{\sin x})^2}\\\displaystyle \large{1+\frac{1}{\tan^2x}=\frac{1}{\sin^2x}}$

Another identity is:

$\displaystyle \large{\tan x=\frac{\sin x}{\cos x}}$

Therefore:

$\displaystyle \large{1+\frac{1}{(\frac{\sin x}{\cos x})^2}=\frac{1}{\sin^2x}}\\\displaystyle \large{1+\frac{1}{\frac{\sin^2x}{\cos^2x}}=\frac{1}{\sin^2x}}\\\displaystyle \large{1+\frac{\cos^2x}{\sin^2x}=\frac{1}{\sin^2x}}$

Now this is easier to prove because of same denominator, next step is to multiply 1 by sin^2x with denominator and numerator.

$\displaystyle \large{\frac{\sin^2x}{\sin^2x}+\frac{\cos^2x}{\sin^2x}=\frac{1}{\sin^2x}}\\\displaystyle \large{\frac{\sin^2x+\cos^2x}{\sin^2x}=\frac{1}{\sin^2x}$

Another identity:

$\displaystyle \large{\sin^2x+\cos^2x=1}$

Therefore:

$\displaystyle \large{\frac{\sin^2x+\cos^2x}{\sin^2x}=\frac{1}{\sin^2x}\longrightarrow \boxed{ \frac{1}{\sin^2x}={\frac{1}{\sin^2x}}}$

Hence proved, this is proof by using identity helping to find the specific identity.

6 0

2 years ago

At Random Stationary, the sales records of 24 employees were examined. Twelve of the employees worked the morning shifts and 12

olga2289 [7]

Answer:

Step-by-step explanation:

D is the answer because in all of the measures of center the first row is smaller than the second.

5 0

3 years ago

Look for Patterns Find the missing numbers in the following pattern. 1,3,9, .81 .

ehidna [41]

Answer:

27 after 81 is 243

Step-by-step explanation:

The pattern is that you multiply 3 each time.

5 0

2 years ago

Read 2 more answers

The container that holds the water for the football team is 23 full. After pouring out 2 gallons of water, it is 12 full. How ma

Mama L [17]

Let full be f and gallons be g
23f-2g=12f
2g=23f-12f
2g=11f
g=5.5f
note 23f is when it is full and x is the number of gallons the container can hold.
g=5.5f
xg=23f
x=46÷11
∴x approximately is 4.9

6 0

3 years ago