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Thank you for your time :) You've been really great help to me and i'm getting better with your step ways. I figure out the sec one it's B right?

If you have: 3^2 + 2^2 = C^2, then:

9 + 4 = C^2

13 = C^2   Now, take the square root of both sides:

C = sqrt(13) = 3.61 (rounded).

Yes.

I only have time for the first one

The nonagon  will have 9 equal isosceles triangles  .....with equal sides of 14m and and included angle of 40°

So....the total area  =

9 (1/2) (14^2) sin (40)   ≈  566.9 m^2

Notice something

1  = 1         one odd

! + 3  = 4    two odds

1 + 3 + 5  = 9     three odds

1 + 3 + 5 + 7   =  16     four odds

So...it appears that the sum of any number, n, of  consecutive odd numbers beginning with 1 = n^2 

And there are 50 odd numbers from 1 - 100.......so the sum  is

(50)^2   = 2500

Well.......we don't actually know what you mean  by  an "ordinary" number......however....

Here's the evaluation  of this  ( allowing for mis-matched parentheses) :

https://www.wolframalpha.com/input/?i=(sqrt(2)%5E6*(1%2F2%2Bsqrt(3)%2F2)%5E6

Total distance between the two towns  =

 80km/ hr * 5 hr  = 400km

So

Distance / Rate  = Time  ....  so.....

400km / 60km / hr  = 6 + 2/3 hrs.

happy birthday!!!!!

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Omg Melody thank you SO much!!!!

It is a beautiful cake, and that cat did a good job holding up the balloons!

My birthday Is April 19th....

This was a HUGE surprise!!!!!

THANK YOU SO MUCH

The rule is

√a  *  √b   =   √ [ a * b]   only if a, b  ≥  0

2x + 0.8 = 0

2x = -0.8

x = -0.4

8.69 / 25.05 = 0.3469(4 s.f.)

Ans * 10^-3 = 0.3469 * 0.001     »»»     0.0003469 (approx)

1.   The pentagon shown can be divided into 10 equal triangles....the base  of each = 10ft

And the height of each can be expressed as  10/ tan36°

So the total area  =

10 (1/2) (10) (10/tan36)  ≈  688.2 ft^2

2.  The octagon shown can be divided into 8  equal isosceles triangles.......the equal sides = 9 m   and the included angle between these = 45°

So the total area  =

8*(1/2)(9^2) sin(45)  ≈  229.1 m^2 

Well, if your monthly payment cannot exceed 28% of $751.36, which means: $751.36 x 28% =$210.38, then the question becomes: What loan amount can you afford to borrow at 3.99% over a period of 15 years? The answer would be =$28,461.00.

multiply everything by 4;

x > 4x-48

put all x's onto the left hand side;

-3x > -48

multiply everything by -1;

3x < 48

(when you multiply by a negative in an inequality, > turns into < and vice versa)

divide everything by 3;

x < 16

man please don't do silly questions there is a calculator in this site

4 

happy birthday !!!!!!!!!!