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Y - 1.45 = 12

   +1.45     +1.45

    Y=13.45

Assuming you want me to solve for z

3/4 + z = 4/5    we want to isolate z

3/4 +z - 3/4 = 4/5 - 3/4  subtract 3/4 from both sides to get z by itself

z = 4/5 - 3/4  simplify

z = 16/20 - 15/20  find the lowest common denominator between the two fractions so that you can subtract the two fractions

z = 1/20 

3/4+z=4/5

\(\frac{3}{4}+z=\frac{4}{5}\)          [ - \(\frac{3}{4}\) 

\(z=\frac{4}{5}-\frac{3}{4}\)          [ least common multiple = \(5\times4=20\)

\(z=\frac{4\times 4-3\times 5}{20}\)

\(z=\frac{16-15}{20}\)

\(z=\frac{1}{20}\)     !

Source: http://www.coolmath.com/algebra/12-2x2-systems-of-equations/03-solving-by-elimination-addition-01

t = 77 + 3h 

t = 92  + 2h 

the point of elimination is to eliminate one of the variables in the system of equations.

Lets eliminate t 

    t = 77 + 3h 

- 1(t = 92 + 2h)     multiply by -1

    t= 77 + 3h        now add the two equations

+ -t= -92 - 2h

    0 = -15 +h

h = 15

Now plug in 15 for h in order to solve for t. 

t = 77 + 3 (15) = 77 + 45 = 122    

So then now we know    t =122 and h =15

Solve the following system:
{t = 2 h + 92 | (equation 1)
t = 3 h + 77 | (equation 2)
Express the system in standard form:
{t - 2 h = 92 | (equation 1)
t - 3 h = 77 | (equation 2)
Subtract equation 1 from equation 2:
{t - 2 h = 92 | (equation 1)
0 t - h = -15 | (equation 2)
Multiply equation 2 by -1:
{t - 2 h = 92 | (equation 1)
0 t+h = 15 | (equation 2)
Add 2 × (equation 2) to equation 1:
{t+0 h = 122 | (equation 1)
0 t+h = 15 | (equation 2)
Collect results:
Answer: |t = 122                 and                    h=15
 

PV = FV / [1 + R]^N

PV = 18,500 / [1 + 0.0535/4]^(24/3)

PV = 18,500 / 1.013375^8

PV = 18,500 / 1.11214519

PV = $16,634.52 - This is what Glen can afford to borrow.

$18,500 - $16,634.52 = $1,865.48 - This is the interest that Glen has to pay.

No Problem

THX!!! UR A LIFE SAVER!!!!!

What is the difference between (-2)^2 and -2^2?

\((-2)^2=(-2)\times(-2)=4\)

\(-2^2=-(2\times2)=-4\)

\(The \ difference \ is \ 4-(-4)=4+4=8\)      !

*Parallel lines have the same slope*

Begin by making y a function of x

7y + 2x -10 = 0

7y + 2x= 10

7y=10 -2x

y= (10/7) - 2/7 x

knowing that the equation of a line is y = mx + b where m is the slope and b is the y intercept  you can rewrite the equation in this format.

y = - (2/7) x + (10/7)

The slope is -2/7

Using point-slope form  we can make a line parallel to the equation:

y-y1 = m (x - x1)

y - 2 = -2/7 ( x- 2)

As you can see these two lines are now parallel.

Agreed

Math was invented by my ancestors! >:( 

But with out math, most of things we have today wouldnt exist

Math has not even finished being built yet. With new discoveries in the world of mathematics by a variety of men and women, it seems that math will never finish it's expansion.

Anthony:Team

           1:4

Proof

14/56=1/4

It's supposed to say (your) and f a r t. I can't believe they censored that. Anyway CPhill, this old coot thanks you for your help. I do have one more question. How do you know when to put the points as (-#,0),(#,0) vs. (#,0),(-#,0)? While I got the answer right, (2√6/5,0),(-2√6/5), the test said I got it wrong because I didn't put it as (-2√6/5,0), (2√6/5,0). What difference does it make which order the pairs are as long as they are correct?

You mix 1/4 cup of juice concentrate for every 2 cups of water to make 18 cups of juice. How much juice concentrate and water do you use?

M = rv^2/G =[90,000 x 5.66^2] / [6.67 x 10^-11]

M = 43,226,446,776,611,694 = 4.3 x 10^16 kg - Ida's mass.

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