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3 years ago

If sin x = .42, what is cos x?

1 answer:

34kurt3 years ago

6 0

From the identity,
sin^2(x)+cos^2(x)=1
then
cos(x)=sqrt(1-sin^2(x))
where sin(x) is given as 0.42.

Note that the above answer applies to 0<x<90 degrees

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Given ƒ(x) = x + 10 and g(x) = x2 + 5x - 1, find ƒ(3) + g(5).

SashulF [63]

If I’m not mistaken it should be 8x+25. :)
Hope this helps!

7 0

1 year ago

Can someone help me with these please.

ELEN [110]

Answer: Barbara did not include a variable in the term $1.49$ , which must represents the number of bottles of iced tea she needs to sell.

Step-by-step explanation:

Let be "x" the number of bottle of water Barbara needs to sell and "y" the number of bottle of iced tea she needs to sell.

She sells iced tea for $1.49 per bottle and water for $1.25 per bottle, so she can write the following equation in order to calculate the number of bottles she needs to sell to earn $100:

$1.25x + 1.49y = 100$

Since Barbara wrote this equation:

$1.25x + 1.49 = 100$

We can conclude that the error Barbara made in writing the equation was: She did not include a variable in the term $1.49$ , which must represents the number of bottles of iced tea she needs to sell.

8 0

3 years ago

A rancher with 420420 meters of fence intends to enclose a rectangular region along a river (which serves as a natural boundary

Kobotan [32]

Perimeter of Rectangle: 2W + 2L
One L is the river so we have 3 sides
420m/3 = 140m

Area of Rectangle is WL
140×140= 19,600 Sq meters

I'm assuming you may have another mathematical system the teacher wants you to use. Yet, I get Area is 19,600 Sq meters

4 0

3 years ago

Simplify the expression below. Then classify the resulting expression

evablogger [386]

Answer:

Simplified = 5

Classification = Monomial

Step-by-step explanation:

<h2>PART I: Simplify the expression</h2>

<u>Given expression:</u>

3x² + 6x + 5 - 3x (2 + x)

<u>Expand parenthesis by distributive property:</u>

= 3x² + 6x + 5 - 3x (2) - 3x (x)

= 3x² +6x + 5 - 6x - 3x²

<u>Put like terms together:</u>

= 3x² - 3x² + 6x - 6x + 5

= 0 + 0 + 5

= $\boxed{5}$

<h2>PART II: Classify polynomial</h2>

<u>Concept:</u>

Polynomial is classified by the number of terms a polynomial has.

Monomial: a polynomial with only one term
Binomial: a polynomial with two terms
...

<u>Classify the given expression:</u>

Original = 3x² + 6x + 5 - 3x (2 + x)

Simplified = 5

5 is a constant and it has only one term

Therefore, it is a <u>monomial</u>.

Hope this helps!! :)

Please let me know if you have any questions

3 0

1 year ago

Read 2 more answers

Simplify 28/184 by reducing to lowest form<br> A) 1/46<br> B) 1/7<br> C) 14/92<br> D) 7/46

Elodia [21]

It’ll be D) 7/46 you can reduce it by dividing everything with 4

5 0

2 years ago