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x>0

Twenty-five is equal to one more than eight times a number. What is the number?

\(y{}^{2}=\frac{1}{9} \)

\(y=\sqrt{}\frac{1}{9}\)

\(y=\frac{1}{3}\)

please write out and explain

 £14000 (.80)^2   =

 £ 8960    after two years

We need to solve this equation for "A"....this will be the invested amount

40,000  = A ( 1 + .08/4)^(3 * 4)    simplify

40,000 = A (1.02)^12     divide both sides by  (1.02)^12

40,000 / [ 1.02 ]^12   = A  = about  $ 31539.73

1 bottle sold=$1.50

2 bottles sold=$3.00

3 bottles sold=$4.50

4 bottles sold=$6.00

5 bottles sold=$7.50

6 bottles sold=$9.00

Just keep adding $1.50 for every additional bottle sold. Also, put # of bottles sold on the x-axis and total cost ($) on the y-axis. 

6000+1500+4000+1500+4000+3000+3000+4000+7500+4000 = 38,500.

11 times 5 is 55, and 55 divided by 8 equals 6.875. 

So, 11x5/8=6.875.

3.55 x 6.023 x 10^23 =2.138165 x 10^24 atoms of NaCl.

It is -7/2 or -3 and 1/2.

It is -7/2 or -3 and 1/2.

 0 = - (¼) x^ 2 – (½) x + 42, solve for x

Solve for x:
0 = -x^2/4-x/2+42

0 = -x^2/4-x/2+42 is equivalent to -x^2/4-x/2+42 = 0:
-x^2/4-x/2+42 = 0

The left hand side factors into a product with four terms:
-1/4 (x-12) (x+14) = 0

Multiply both sides by -4:
(x-12) (x+14) = 0

Split into two equations:
x-12 = 0 or x+14 = 0

Add 12 to both sides:
x = 12 or x+14 = 0

Subtract 14 from both sides:
Answer: |x = 12          or          x = -14

100

what are b, c, d

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any number

8   7

6 * 4 = 2.3333333333333333, 

 

     7

8 * 4

   6   = 2.3333333333333333 too

use BODMAS Bro

     8 * (7/4)/6= 14/6=2.333

Understand what 'rational' and 'irrational' actually mean and you will find these questions easy.

A rational number is just a number that can be expressed as a ratio (like a fraction) of two whole numbers.  For example 0.3 is rational because you can write it as the ratio of the two whole numbers 3 and 10   to get 0.3 = 3/10.

An irrational number is one that CAN't be expressed as a ratio of two whole numbers. An obvious one is pi, so is sqrt(2).

Well said, Melody......!!!!....

P.S.    .......some people accept anything, no matter the source..........

sqrt (2)   is irrational

Let r be the lesser root and r^2 be the greater.......the sum of the roots   = -b/a  = -[-6] / 1  = 6

So we have that

r^2 + r  = 6     →    r^2 + r - 6 = 0      

Factor

(r + 3) (r - 2)   = 0  

So r = -3    or   r = 2

Then r^2  = 9     or r^2  =4

And the product of the roots =  c/a   =  k/a  = k

So....k =   (-3)(9)   = -27     or k = (2)(4)  = 8

Check

x^2 - 6x - 27  = 0      factors as  (x + 3)(x - 9) = 0     and  the roots are -3 and 9

x^2 - 6x + 8  = 0      factors as (x -2) (x - 4) =0      and the roots are 2 and 4

Looks to me like you cooked this one in your head!!. It doesn't appear to have a solution!!.