50 Answered Questions for the topic Elementary Algebra

Elementary Algebra Confusion

09/17/17

I need help and better understanding of this math problem.

The width of a brick is half the length, and the length is 2 inches less than four times the height. If the sum of the three dimensions is 21.5 inches, find the volume of the brick. Simplify your... more
Elementary Algebra Confusion

09/16/17

I need help with a problem I can't seem to get. I've tried over and over again.

I've tried this problem over and over again and have gotten it wrong. Please help me !   Question: The width of a brick is half the length, and the length is 1 inch less than four times the... more
Elementary Algebra

08/13/17

Factor the polynomial P(x) = x^4 − 16x^2 − 225 completely into linear factors with complex coefficients

The answer is (x + 3i)(x − 3i)(x + 5)(x − 5) but I really don't understand why it isn't (x + 5i)(x − 5i)(x + 3)(x − 3) \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ Also, what do you think... more
Elementary Algebra

07/24/16

order of operations and algebra

(3x-2y)^2
Elementary Algebra Algebra Struggling Student Math Help

07/19/16

full strength anti freeze is 12.99 a gallon. they also sell a 50/50 pre-mix which is diluted 50% with water for 10.99 a gallon.

Full question: full strength anti freeze is 12.99 a gallon. they also sell a 50/50 pre-mix which is diluted 50% with water for 10.99 a gallon. how much are you paying per gallon for water if you... more

07/19/16

11 qt radiator is currently full of 30% anti-freeze. It is supposed to be 50%. How much should he drain out and replace with 100%.. continued below

Full story problem.. Bob's 11-quart radiator is currently full of 30% anti-freeze. It is supposed to be 50%. How much should he drain out and replace with 100% anti-freeze to have a full radiator... more
Elementary Algebra Algebra Mixture Problems

07/19/16

How much extra-lean hamburger (12% fat) needs to be added to 339 lbs of regular hamburger (27% fat) to make a batch of lean meat (20% fat)??

I am struggling with these mixture problems any help getting the correct formula and answer? Getting desperate 
Elementary Algebra

07/16/16

600 feet fence width 5 times the length. find the dimension

the abc preschool purchased 600 feet of fence to go around its playground. the entire fence will be used to surround all four sides of the playground. the width of the playground is 5 times the... more
Elementary Algebra

05/01/16

What are the speeds of the cars?

One car travels 490 miles in the same amount of time it takes a second car traveling 5 miles per hour slower than the first to go 455 miles. What are the speeds of the cars?
Elementary Algebra

03/10/16

Dimensions of a rectangle

The length of a rectangle is one foot more than three times its width. If the perimeter is 98 feet, what are the dimensions of the rectangle?
Elementary Algebra Algebra

02/21/16

The speed of the trains in miles per hour are ?

Suppose two trains leave a station at the same time, traveling in opposite directions. One train travels 20 mph faster than the other. In 3.5 hours, the trains are 371 miles apart. Find the speed... more
Elementary Algebra Algebra

02/21/16

One-seventh equals the quotient of a number and 14

Find the number
Elementary Algebra Algebra

02/18/16

The cyclist's speed during the first portion was ? miles per hour and his speed during the second portion was ? miles per hour

A cyclist rode the first 24-mile portion of his workout at a constant speed. For the 15-mile cooldown portion, he reduced his speed by 3 miles per hour. Each portion of the workout took the same... more
Elementary Algebra Algebra

02/18/16

If four times a number, added to 3 is divided by the number plus 8, the result is seven halves.

 Find the number
Elementary Algebra Algebra

02/12/16

The sum of negative three and five times a number

Write the following phrase as an algebraic expression. Use x for the unknown number.
Elementary Algebra

07/04/15

$100sq per ft a triangular sign base of 5 ft height of 3.5 ft the sign will cost

A= bh   = 1/2 (5) (3.5)   =
Elementary Algebra

04/10/15

A rectangular athletic field is twice as long as it is wide. If the perimeter of the athletic field is 192 yards, what are it's dimensions?

 This is elementary algebra. Now I'm just filling the description so I can move past this. bla bla bla 20
Elementary Algebra Algebra 1

03/31/15

What would be the variable in this algebra question

The length of a rectangle is twice the width. Let W be the width, L be the length, and P be the perimeter, all units in inches. A. Which symbol(s) W,L,P are variables? B. Which symbol(s) W,L,P are... more
Elementary Algebra

02/02/15

Comparing weights

The normal weight of a 6 foot 2 inch man is between 150 and 190 pounds. To the nearest hundredth, what would such a person weigh in kilograms?
Elementary Algebra

02/02/15

Land elevations

The land elevations in Nevada fall from the 13,143-foot height of Boundary Peak tot he Colorado River at 470 feet. To the nearest tenth, what is the range of these elevations in miles?
Elementary Algebra

11/05/14

How do i find a perimeter and rectangle length

I am trying to get the amswer to the following: If a rectangles length is 8 feet longer than its width. And the perimeter of the rectangle is 236 feet, what is the length of the rectangle?
Elementary Algebra

10/03/14

this can only be done when multiplying fractions if any pair of numerator and denominator can be divided by the same number evenly

This is a crossword puzzle that I'm needing help on. It's a six letter word    C-N-E-
Elementary Algebra

09/29/14

Similar geometric shapes

Similar geometric shapes will have sides that are proportional. Quadrilaterals pqrs and ghjk are similar. If p=3', s=8' and g=5', find the length of side k.
Elementary Algebra

05/01/14

how do i convert an equation into slope intercept form if the only value given is (x)

use slope intercept form to graph the equation X=6/5y  slope intercept form is y=mx+b = y=m(6/5y)+b how do I slove
Elementary Algebra Algebra

02/19/14

6x-4y=1 -6x-4y=7

6x-4y=1    -6x-4y=7

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