All Answers 355953 Answers

Just put in  -3 wherever 'x' is in the equation and calculate it out....

y = 2(-3)^2 -4(-3) - 5

   = 2(9) +12 -5

==18 +12 -5

y=25

Uhhh.....sorry....we'll need that sketch....

With WHAT do you need help??

Yes, it is 28

To divide a fraction by a fraction, flip the denominator over and MULTIPLY

1/4  /  2/3   =   1/4  x  3/2  = 3/8

Wait its 28?

78?

first, convert both fractions into improper fractions. for the 5 simply put a 1 as the denominator! and for 4 and 2/5 just multiply 4 by 5 and add two (now its 22/5) 

now we will need too find the lcd, which is 5

our new fractions are 25/5 and 22/5

multiply these two fractions too get your answer

5 x 4 2/5 =   5x4 + 5 x 2/5 = 20 + 2 = 22

he or she may not know how to solve the equation 

Re-arrange the second equation to get  x =2+3y    and substitute this value of 'x' into the first equation:

2(2+3y) + 3y = 13

4 + 6y + 3y = 13

9y = 9

y = 1       Substitute this value of y into one of the equations to solve for 'x'

x = 2+ 3y

  = 2 + 3(1) = 5       x,y =  5,1

P.s, S is the number of sales she needs to make! and if you get a decimal, just round to the nearest number 

Well the first question is simple! find the equation that could equal 1021 dollars, note in A at the end of 13.25 there is an s, this s is an unknown number that 13.25 will be multiplied by. so if we subtract 650 from 1021 we will find how much more we need. 1021-650= 371. so divide 650 by 13.25 and you will find S

l x w for a rectangle or square

pi x r^2   for a circle

various formulas for other shapes......of which shape are you looking to find the area??

The correct answer is A    if you solve this equation for 's' you will get the answer to the second part of the question

5/6 is already in fraction form, but it can be converted into a decimal and a percentage.

divide 5 by 6 to get the decimal 0.833, this is a repeating decimal

now that we havea decimal we can get the percent easily, the percent of 0.833 would be 83.33%

.14 = 14/100 = 7/50

(132-174)/6days =

Depends....is this   8/3   divided by 5  =  8/15

or  8 divided by 3/5 ?     = 8 x 5/3        = 40/3    which is an improper fraction

point one four is    14 hundredths  =  14/100 =  7/50  

5-5-6-6-6-8        The MEAN is the average.

The MEDIAN is the number in the middle.....if it is a list of an even number of terms (in this case six of them) , take the average of the middle two to be the median....  (6+6) /2 = 12/2 = 6 = median

Here is a good explanation of law of cosines:
http://hyperphysics.phy-astr.gsu.edu/hbase/lcos.html

and here for law of sines

http://www.mathwarehouse.com/trigonometry/law-of-sines/formula-and-practice-problems.php

I would say about 6 feet