Hi 



Check factoring Using FOIL

F	First terms

O	Outside terms

I	Inside terms

L	Last terms

 

Hi



Check factoring Using FOIL

F	First terms

O	Outside terms

I	Inside terms

L	Last terms

 

Hi

Simplify rational expressions: 

'Reducing' by Finding Factors both Numerator and denominator have in Common

 

 

 

Hi

3x + 2y + z = 7, 

5x + 5y + 4z = 3  ||Mulitply 1st Eq by -5 and 2nd EQ by 3 and add

        || 

3x + 2y + z = 7

3x + 2y + 3z = 1

           2z = -6

            z = -3,  y = -1 and x = 4  

 

Hi

If a plant starts out as 12 inches and grows 4 inches a day how tall will it be in 44(days)

 H = 

 

Hi

From a standard 52-card deck, how many 7-card hands will have 3 spades and 4 hearts?

 cards in each suit

  

 

Hi

how to solve 

7x-1=2x+5     ||Combine Like Terms by adding -2x and 1 to both sides of the EQ

  5x = 6

   x = 6/5  0r 

 

Hi

measure of an angle exceeds the measure of its complement by 20

     x = (90°-x) + 20°

    2x = 110°

     x = 55°



and..(its complement is 35°)

    55° = 35° + 20°

 

Hi

If 7 guys take 8 days to build a trench, 

how many guys will it take to build the trench in 1/2 day?



 

      112 guys = x

 

Hi

A class has 16 students, of which 3 are seniors.  non-seniors

How many committees of size 3 can be selected if at least one member of each committee must be a senior?

 All possibilities - number of committees with no seniors

 

 

Hi

If the distance between two points on the coordinate axes is the square root of 65 , 

what could be the coordinates of the two points?

D = 

for ex:

(6, 8)

(2, 1)  D = 

 

Hi

For the normal distribution: 

one  standard deviation from the mean accounts for about 68.2% of the set 

two standard deviations from the mean account for about 95.4% ***

and three standard deviations from the mean account for about 99.7%.

Important to Understand z -values as they relate to the Standard Normal curve:

Below:  z = 0, z = ± 1, z= ±2 , z= ±3 are plotted.  

Note: z = 0 , 50% of the area under the curve is to the left and 50%  to the right

 

Hi

y = x^2 to  Green 

y = –2(x – 2)^2 + 2  Blue

D

 

Hi

EBIT = x

 | Cross Multiply to solve for x = 21000

   750(x-4000) = 1000(x-8250)

    1000*8250-750*4000 = 250x

               5250000 = 250x

                   21000 = x

 

Hi

f(x)=x^3-4x^2-5x = x(x^2-4x-5) = x(x-5)(x+1)

zeroes: -1,0,5

 

Hi

is this Your question??

 

 

Hi

How many different committees can be formed from 6 teachers and 47 students 

if the committee consists of 4 teachers and 2 students?

    different committees

 

Hi

For the normal distribution: 

one  standard deviation from the mean accounts for about 68.2% of the set **** 

two standard deviations from the mean account for about 95.4%

and three standard deviations from the mean account for about 99.7%.

Important to Understand z -values as they relate to the Standard Normal curve:

Below:  z = 0, z = ± 1, z= ±2 , z= ±3 are plotted.  

Note: z = 0 , 50% of the area under the curve is to the left and 50%  to the right

 

Hi

Make a graph for the following equation :

2x + y = 2   ||(x,y) ordered pairs (0,2) and (1,0) in this line.  Plot and connect with a Line (Green)

 x - y = 1   ||(x,y) ordered pairs (0,-1) and (1,0) in this line.  Plot and connect with a Line (Blue)

Lines intersect at (x,y) ordered pair Pt(1,0)..the solution for this system of 2 EQs

 

Hi

bag containing  marbles: 8 green marbles and 12 blue marbles

draw one

P(green) = 8/20 = 2/5  (28/70)

bag containing  marbles: 5 green marbles and 9 blue marbles

draw one

P(green) = 5/14   (25/70)

   25/70 < 28/70

As the fractional amount of green marbles decreases, there is less probability of drawing it

 

 

Hi

 two lines intersecting at the positive 2 on the x axis.

That would mean the two lines both have x-intercepts = 2

That is... when y = 0  ⇒  x = 2

A. 

3x - 2y =6   || y = 0 ⇒ x = 2

2x + y  =4   || y = 0 ⇒ x = 2 

C. 

3x + 2y=6   || y = 0 ⇒ x = 2 

2x -  y= 4  || y = 0 ⇒ x = 2

 

Hi

Please give an example..

On this  help site, people post a particular problem, many

of those problems posted are Algebra problems that students have

questions about or are having difficulty solving. 

What type of help are You needing.

ewatrrr

 

Hi

consider the sample space: 

P(3 throws necessary) = 1-6/8 = 2/8 = 1/4

THT

THH 

HHH

HHT

HTH

HTT



TTT

TTH

 

Hi

finding the domain for 



When: (x+1)(x-5)= 0, x = -1  0r x = 5

domain is all real numbers except x = -1  and x = 5

Denominator cannot be ZERO

Hi

using sythetic division find (4x^3-3x+15)/(x+3)

using Synthetic Divsion

-3	4	0	-3	15

 	 	-12	36	-99

 	4	-12	33	-84

results in: 4x^2 - 12x + 33  R = -84 

 

 

Hi,

How much salt is there in 50 gallons of a 3% salt solution?  = 1.5gal

 

Hi,

The factor theorem states that a polynomial f(x) has a factor (x − k) if and only if f(k) = 0

roots -1+4i and -1-4i

f(x) = a(x-(-1+4i))(x -(-1-4i)) = a(x^2 -2x +17)

 a = 1

f(x) = x^2 -2x +17

Check product  Using FOIL

F	First terms

O	Outside terms

I	Inside terms

L	Last terms

 

Hi,

 |Multiplying thru by 28 so as all denominators = 1

  7(6x-7) + 4(3x-5) = 5x + 78 

  42x - 49 + 12x - 20 = 5x + 78    ||Combining Like Terms

      49x = 147

        x = 3

and

 

Hi,

The factor theorem states that a polynomial f(x) has a factor (x − k) if and only if f(k) = 0

zeroes 1, 3-i (and 3+i)

f(x) = (x-1)(x-(3-i))(x-(3+i) = (x-1)(x^2 - 6x + 10) = x^3-7x^2 +16x - 10

 

Hi,

108% 'of' 714 is 

 

Hi,

C=0.35x - 684

estimate the year in which the cost reached 6.6 billion