MATHEMATICS MIDDLE SCHOOL

What is cos 23? I’m confused For some reason

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

cos 23 = adjacent side / hypotenuse

= 12/13.

Answer 2

Answer:

Answer:

Step-by-step explanation:

Just put cos23 in your calculator then (=)

and finally press (S-D)

Save this answer(on sheet or paper) and check these answers by putting in your calculator each other and (S-D).

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Simplify each expression 6x + 2x

Answers

Answer: 8x

Step-by-step explanation: add it normally but carry the x

the answer is
8x
as you add 6x and 2x to make 8x

the area of a rectangle is given by the trinomial 10×² - 31x-14. The length of the rectangle is 5x+2. What is the expression for the width of the field.

Answers

$10x^2 - 31x-14=10x^2+4x-35x-14=2x(5x+2)-7(5x+2)=\n\n=(5x+2)(2x-7)\n\nD:\ \ 5x+2>0\ \ \ and\ \ \ \ \ 2x-7>0\n.\ \ \ \ \ \ 5x>-2\ \ \ \ \ \ and\ \ \ \ \ 2x>7\n.\ \ \ \ \ \ \ x>-(2)/(5)\ \ \ \ \ \ and\ \ \ \ \ \ x>3 (1)/(2) \n\nD=(3 (1)/(2);\ +\infty)\n\nAns.\ \ The\ width\ is\ \ \ \ 2x-7$

What is the y-intercept of the equation of the line that is perpendicular to the line y = 3/5 x + 10 and passes through the point (15, –5)?The equation of the line in slope-intercept form is y = -5/3 x +

Answers

Answer:

$\large\boxed{y-intercept=20}$

Step-by-step explanation:

$\text{Let}\ k:y=_1x+b_1\ \text{and}\ l:y=m_2x+b_2.\n\nl\ \perp\ k\iff m_1m_2=-1\to m_2=-(1)/(m_1)\n============================\n\n\text{We have}\ y=(3)/(5)x+10\to m_1=(3)/(5).\n\n\text{Therefore}\ m_2=-(1)/((3)/(5))=-(5)/(3).\n\n\text{The equation of the searched line:}\ y=-(5)/(3)x+b.\n\n\text{The line passes through }(15,\ -5).$

$\text{Put thecoordinates of the point to the equation.}\ x=15,\ y=-5:\n\n-5=-(5)/(3)(15)+b\n\n-5=(-5)(5)+b\n\n-5=-25+b\qquad\text{add 25 to both sides}\n\nb=20\n\n\boxed{y=-(5)/(3)x+20}$

Which one of the following piecewise graphs is not a function?

Answers

The first graph is not a function because it has two values at x = 3
Definition of a function is that it is a relation that assigns exactly one value for each value in it's domain.

My homework says rewrite each statement using symbols for example one says Fourteen more than six
Am I suppose to put a symbol or number or variable ?

Answers

The symbol ">" means bigger than, so you would do "14 > 6" if you wanted to say "fourteen is bigger than six"

Well the question says "rewrite each statement using symbols so I guess it means using symbols...

Herman horse trader bought a horse for $600 and then sold it for $700. The next day he bought it back for $800 and then sold it for $900. How much money did Herman make altogether?

Answers

The total amount of the profit will be $200.

What is a profit?

A monetary profit, particularly the distinction between the amount gained and the actual cost of purchasing, running, or creating anything.

The profit is given as,

Profit = Selling price - Cost price

Herman horse trader bought a horse for $600 and then sold it for $700.

Then the profit will be

⇒ $700 - $600

⇒ $100

The next day he bought it back for $800 and then sold it for $900.

Then the profit will be

⇒ $900 - $800

⇒ $100

Then the total amount of the profit will be

P = $100 + $100