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3 years ago

10

Can someone please HELPPP ILL MARK BRAINLIEST SOLVE 8 PLEASEE

1 answer:

wel3 years ago

8 0

Answer:

.

Step-by-step explanation:

Ok for this one you need a physical protractor to answer it. Line the protractor against a straight line of the shape and then where ever the line point to on the degree point is the answer. No one can really help you with this online unless you have the actual paper.

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Sergeeva-Olga [200]

Answer:

if u divide it then slop it u will get your answer

3 0

3 years ago

Prove algebraically that r = 10/2+2sinTheta is a parabola

Xelga [282]

Answer:

$y = - \frac{ 1 }{10} {x}^{2} + \frac{5}{2}$

Step-by-step explanation:

We want to prove algebraically that:

$r = \frac{10}{2 + 2 \sin \theta}$

is a parabola.

We use the relations

${r}^{2} = {x}^{2} + {y}^{2}$

and

$y = r \sin \theta$

Before we substitute, let us rewrite the equation to get:

$r(2 + 2 \sin \theta) = 10$

Or

$r(1+ \sin \theta) = 5$

Expand :

$r+ r\sin \theta= 5$

We now substitute to get:

$\sqrt{ {x}^{2} + {y}^{2} } + y = 5$

This means that:

$\sqrt{ {x}^{2} + {y}^{2} }=5 - y$

Square:

${x}^{2} + {y}^{2} =(5 - y)^{2}$

Expand:

${x}^{2} + {y}^{2} =25 - 10y + {y}^{2}$

${x}^{2} =25 - 10y$

${x}^{2} - 25 = - 10y$

$y = - \frac{ {x}^{2} }{10} + \frac{5}{2}$

This is a parabola (0,2.5) and turns upside down.

4 0

3 years ago

3 true?<br> For what value of x is the equation<br> 2-3<br> - +4<br> À<br> B. 3<br> C. 9<br> D. -15

noname [10]

Answer:

3

Step-by-step explanation:

2 -3 = -1 + 4 = 3

4 0

3 years ago

Rates for having a manuscript typed at a certain typing service are $5 per page for the first time a page is typed and $3 per pa

Goryan [66]

Answer:

D. $680

Step By Step Explanation:

100 pages are typed. Each page coast $5 to type.

100 x 5 = 500

40 pages are revised once. It costs $3 to revise a page once.

40 x 3 = 120

10 pages are revised twice. It costs $3 to revise a page once so it will cost $6 to revise it twice

10 x 6 = 60

To find the total cost we add all the amounts together

500 + 120 + 60 = 680

The final answer is $680

6 0

3 years ago

PLEASE HELP!! IM HAVING A HARD TIME UNDERSTANDING THIS QUESTION.

kondor19780726 [428]

Answer:

14.6

Step-by-step explanation:

8 0

3 years ago