All Answers 358480 Answers

Here are the solutions for your equations. You have to graph them to decide if the lines are perpendicular. I myself think they will criss cross. This is how you plot them:

ContourPlot[{7 y = 21 + 9x, -3y = -24 + x}, {x, 71/34, 139/34}, {y, 203/34, 271/34}]

Solve the following system:
{7 y = 9 x+21 |     (equation 1)
-3 y = x-24 |     (equation 2)
Express the system in standard form:
{-(9 x)+7 y = 21 |     (equation 1)
-x-3 y = -24 |     (equation 2)
Subtract 1/9 × (equation 1) from equation 2:
{-(9 x)+7 y = 21 |     (equation 1)
0 x-(34 y)/9 = (-79)/3 |     (equation 2)
Multiply equation 2 by -9:
{-(9 x)+7 y = 21 |     (equation 1)
0 x+34 y = 237 |     (equation 2)
Divide equation 2 by 34:
{-(9 x)+7 y = 21 |     (equation 1)
0 x+y = 237/34 |     (equation 2)
Subtract 7 × (equation 2) from equation 1:
{-(9 x)+0 y = (-945)/34 |     (equation 1)
0 x+y = 237/34 |     (equation 2)
Divide equation 1 by -9:
{x+0 y = 105/34 |     (equation 1)
0 x+y = 237/34 |     (equation 2)
Collect results:
Answer: | 
| {x = 105/34
y = 237/34

28/81

6+f/9=9  f=75, If you substitute 75 for f, then you get this:

6 + 75/9=6 + 8 1/3=14 1/3

6+f/9=9,

f/9=9-6

f/9=3, multiply both sides by 9,

f=27

Try the calculator here. Enter 28, then press  √x  key, followed by = sign, and see what you get.

what is 1/2x=7 ?

Multiply both sides by 2 and see what you get.

2/3x+4y=-1
1/2x-3y=-9/4

Solve the following system:
{(2 x)/3+4 y = -1 |     (equation 1)
x/2-3 y = -9/4 |     (equation 2)
Subtract 3/4 × (equation 1) from equation 2:
{(2 x)/3+4 y = -1 |     (equation 1)
0 x-6 y = (-3)/2 |     (equation 2)
Multiply equation 1 by 3:
{2 x+12 y = -3 |     (equation 1)
0 x-6 y = -3/2 |     (equation 2)
Multiply equation 2 by -2/3:
{2 x+12 y = -3 |     (equation 1)
0 x+4 y = 1 |     (equation 2)
Divide equation 2 by 4:
{2 x+12 y = -3 |     (equation 1)
0 x+y = 1/4 |     (equation 2)
Subtract 12 × (equation 2) from equation 1:
{2 x+0 y = -6 |     (equation 1)
0 x+y = 1/4 |     (equation 2)
Divide equation 1 by 2:
{x+0 y = -3 |     (equation 1)
0 x+y = 1/4 |     (equation 2)
Collect results:
Answer: | 
| {x = -3
y = 1/4

3287.239= 2000(1+APR/4)^40,

The APR=5%

An umbrella has a radius of 1.3 m. calculate the area.

Assuming that the umrella is a perfect circle, then you have:

Area=Pi X r^2=1.3^2 X 3.141592=5.30929048

What is 1.42(35)? I'm just testing the Ask Question feature.

=49.7, try the calculator and see if you can get the same answer.

Did you try it on the calculator? Try and see if you can get the same answer.

2^19=524,288

You have to re-arrange your equation like this. Start from the left  hand inside the bracket with sin(.35pi) followed by cos(.35pi+2X.35pi). If you want it in Radians, just switch the calculator into radians, in the bottom left hand corner. Your answer should be=0.1397..............etc.

Use this equation to get your calculations:

2/pi (0.35 pi+sin(0.35 pi) cos(0.35 pi+2×0.35 pi))

Horses are measured in units called Hands. One inch equals 1/4 hand. The average Clydesdale is 17 1/5 hands tall. What is this height in inches? In feet?

Since 1 Hand=4 inches, then we have:

17 1/5 X 4=68.8 inches, the horse's height, or,

68.8 / 12=5 feet, 8.8 inches, the horse's height.

what is 5$ and 75 cents times 5

Did you try it on a calculator?

$5.75 X 5=$28.75 Is that really difficult?

I don't think so. It does graphs, which you maybe able to copy.

If y=x what does xy equal?

Is there any relationship between 5+1=6,

So that 6=6 has nothing in common with 6 X 6. When you see something like xy, that means x times y.

how can i convert fractions to repeating or terminating decimals?

You most certainly can. Just try any fraction you want on a calculator.

Rachel budgeted $76.50 for school clothes. This is 0.45 of her total budget. How much does Rachel have in her total budget?

If Rachel's total budget was n, then:

.45n=$76.5 divide both sides by .45

n=$76.5/.45

n=$170.00 Rachel's total budget.

The answer is C, because square root of 60 is IRRATIONAL number, which means you cannot write it as a "RATIO" of two numbers. It goes on forever.Try it on a calculator.

Does 1/9 really equal .1(repeating)

Yes, it REALLY =.111111111111111111111111111.................etc.

Did you try it on a claculator? Just enter 1 then press  " ÷ " key, then enter 9 followed by = sign. Then you will see the result.

Hallo Melody

3 5/8 yards to have an equal length.

u+2u+3u*2=1u+2u+6u=9u

|-13|=13