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Otrada [13]
3 years ago
5

On January 1st, Jerome concocts a rumor and tells Beth. On January 2nd, they each tell a new person. By the end of January 2nd,

four people have heard the rumor. On each subsequent day, each person who has heard the rumor spreads it to a new person.
How many people have heard the rumor by the end of January 8th?

Mathematics
1 answer:
lukranit [14]3 years ago
3 0
256 people heard the rumor by January 8th

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Which of the following is a solution of the system 2x + y = 9 and 3x + 5y = 19.​
Nezavi [6.7K]

2x+y=9

3x+5y=19

I will do this problem in 2 ways. I.)Substitution II.)Elimination

Solution I.) Substitution

We can subtract 2x from both sides in the first equation.

y=9-2x

Now we can substitute the y in the second equation with 9-2x

3x+5(9-2x)=19

-7x+45=19

-7x=-26

x=26/7

y=9-2(26/7)=11/7

Solution II.)Elimination

We can multiply both side of first equation by 5 to get a 5y in both equations.

10x+5y=45

Now because both are positive 5y we just need to do simple subtraction of the 2 equation, each side respectively.

(10x+5y)-(3x+5y)=45-19

7x=26

x=26/7

2*26/7+y=9

y=11/7

Ultimately you get the same answer, both are viable methods, some problems are faster with one method but I recommend mastering both since they are very useful.

4 0
2 years ago
Finding the area of a regular polygon​
ddd [48]
<h2><u>Solu</u><u>tion</u><u>:</u></h2>

360° ÷ 10 ÷ 2 = 18°

So the length of the decagon side is:

10 × tan18° × 2 = 20 × tan18°

The area is: ½ × 20 × tan18° × 10 × 10 = 1000 × tan18°

≈ 324.9

.: <u>3</u><u>2</u><u>4</u><u>.</u><u>9</u> is the final answer.

<em>I</em><em> </em><em>h</em><em>ope</em><em> </em><em>this</em><em> helps</em><em>. </em>

5 0
2 years ago
Convert the cartesian equations to a polar equation<br> y=4x^2
alexdok [17]

Answer:

B

Step-by-step explanation:

7 0
3 years ago
What's the area of the trapezoid?
Lelechka [254]

Answer:

Mark brainliest please if i am correct one more brainliest please

Step-by-step explanation:

A=a+b

2h=15+25

2·5=100

3 0
3 years ago
Read 2 more answers
What is 1/2 + 4/3 + 3/2 + 4/3 + 10/6 = ??<br> (they are fractions)
Jet001 [13]

6 and 1/3 or 19/3 or if you need the decimal 6.3 repeating

4 0
2 years ago
Read 2 more answers
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