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Multiply by 2 on both sides. 

x+8=20

Subtract 8 from both sides, now you have x=12.

So x=12

4. 42    is equal to  4  42/100     or    4  21/50

4. 42    is equal to  4  42/100     or    4  21/50

The diagonal makes the rectangle into two RIGHT TRIANGLES....so use the Pythagorean Theorom

a^2 + b^2  = c^2

3^2 + 2^2  = c^2       (c is the diagonal in this case....the hypotenuse of the right triangle)

9 + 4 = c ^2

13 =c^2

sqrt(13) = c (the diagonal )     sqrt 13   = 3.60555

Solve for x:
(x+8)/2 = 10

Multiply both sides of (x+8)/2 = 10 by 2:
(2 (x+8))/2 = 2×10

(2 (x+8))/2 = 2/2×(x+8) = x+8:
x+8 = 2×10

2×10  =  20:
Answer: | x+8 = 20                 x=12

Use the rule   V   = IR      v = volts  I = amperes  R = ohms

v = (11)(20) = 220v

m/s^2  is a measurement of ACCERATION

m/s      is a measure of VELOCITY

if you have  m / (m-sec^-2)     that is equal to    (m-sec^2)/m  = sec^2  (the same thing as 1/(sec^-2)

Yup......what is your question(s) ?

advanced or regular

yes that should be correct

Neither are ZERO....  AS written   -1(-1)   MEANS   -1  x  -1     which equals   +1  (neg x neg = pos)

2(-2)   MEANS   2  x  -2    which equals  -4  (Neg x Pos = Neg)

P + w = 490      P= plane speed   w = wind speed

P - w =  290       Add BOTH equations together

2P = 780   SOlve for P

p= 780/2 = 390 mph

Junior year math? It's challlanging

is that math hard or easy

Ohh. I'm in 11th

I don't I 'm in 8 th

If you want the discount percntage, then we have:

1 -(875/12,000) X 100=92.71% the discount percentage.

Simplify the following:
3 sqrt(3)+3 sqrt(3)

3 sqrt(3)+3 sqrt(3) = 6 sqrt(3):
Answer: | 6 sqrt(3)

No, really! *rolls eyes* sometimes I don't need to hear of others good fortune...:D

I have the same sentiments Bree... Loooong day guest.... So excuse members if they mean...

12,000/875=13.71429 - 1=12.71429 x 100=1,271.429%

Yeah! What grade are you in? If you don't mind me askin'.

right toooooooooooo many teachers talking 

Sorry.. Long day :)