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elixir [45]
3 years ago
9

Julie says that she can perform a magic trick with numbers. She asks you to pick a whole number, any whole number. Square that n

umber. Then add twice the your original number. Next add 1. Take the square root of the result. Finally, subtract your original number. Then Julie exclaims with authority, "Your answer is 1." Is your answer 1?
Mathematics
1 answer:
Advocard [28]3 years ago
8 0

Answer:

No

Step-by-step explanation:

I picked 2. Then got 4. Then 8. Then 9. Then 81. Then 79.(i dont know if this is right)

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Find x from given equations sin30 + 2 cot^2 30 + x cos^2 30= 8+ tan^2 45 + cos 60​
julia-pushkina [17]

Answer

1/2+2×(sqrt3)^2+x.(sqrt3/2)^2=8+1^2+1/2

1/2+2×3+x.3/4=8+1+1/2

1/2-1/2+6+x.3/4=9

x.3/4=9-6

x.3×4=3

x.3=3×4

x.3=12

x=12/3

x=4.

so, the value of x is 4.

hope it helps you.

4 0
3 years ago
Solve question in image (yr 8 math, 40 pt)
Nady [450]

Answer:

y = 3

Step-by-step explanation:

(5y - 3)/4 + 6 = 3y

5y - 3 + 24 = 12y

7y = 21

y = 3

Check.

(5*3 - 3)/4 + 6 = 3*3

(15 - 3)/4 + 6 = 9

12/4 + 6 = 9

3 + 6 = 9

9 = 9

7 0
2 years ago
Read 2 more answers
The rule that applies to the following number sentence 0÷7=0
Maurinko [17]
Anything multiplied by zero is zero
6 0
3 years ago
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Write all the prime numbers between 10 and 30.​
insens350 [35]
It's 11, 13, 17, 19, 23 and 29.
5 0
3 years ago
Kiersten runs a website that helps people learn programming. Every month, Kiersten receives a subscription fee of \$10$10 from e
snow_tiger [21]

Answer:

$1200.

Step-by-step explanation:

We have been given that Kiersten runs a website that helps people learn programming. Every month, Kiersten receives a subscription fee of $10 from each of the subscribers to her website.    

Let us find number of subscriber that will pay this month Kiersten for her online business.

Last month, the website had 100 subscribers. This month, 30 new members joined the website, and 10 members cancelled their subscription, therefore, number of subscriber this month will be 100+30-10=130-10=120 subscribers.  

To find amount that Kiersten will receive from online business we will multiply 10 by 120.  

\text{Kiersten will earn from online business}=120\cdot 10

\text{Kiersten will earn from online business}=1200

Therefore, Kiersten will earn $1200 from online business this month.


4 0
3 years ago
Read 2 more answers
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