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Chemistry/Math/Biology Tutor

Hebron, IN (46341)

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A has 47628 votes less than o how many votes did o have

Need equation

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Asked by Cj from Rhinelander, WI
00

If I am reading your post right and there is no more to the problem:

A = O - 47628

Key phrase here is "votes less then" meaning taking it away from.

It wants you to solve for O so you add 47628 to A to get O

O = A + 47628

In order of operation, does combining like terms always come after reordering?

I understand that you work from left to right

I understand that first you solve what is inside ( ) then inside brackets and I understand that fractions are considered as symbols and they come first as well.

I understand that X and / come before + and -.

Is it always after these rules have been followed to the max that you combine like terms?

Is there a simple way to understand the order beyond the basics?

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Asked by Althea from Houston, TX
00

The rules are as follows:

If you can remember this phrase, you should be good.

Please Excuse My Dear Aunt Sally

P = Parenthesis E = Exponents M = Multiplication D = Division A = Addition S = Subtraction

Once you have done the first four, combining like terms comes with addition and subtraction.

How do I factor polynomials?

We already learned this in class but I still don't understand.

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Asked by Cherlinda from Canoga Park, CA
00

If you have a trinomial (ax^2 + bx + c)

you have to break it down into two binomials

For example x^2 + 5x + 6

If a = 1 then the product of the two numbers equaling c must add up b

6 = 2*3 ............... so 2+3 = 5

thus (x+3)(x+2)

If a is not equal to one, you then have to take into consideration the factors of a as well as c

For example: 2x^2 + 7x + 3

a = 2 and c = 3 so the product of two numbers equaling a and products of two numbers equaling c must equal b in some way of multiplying

2 * 1 = 2 ....

Because those are the only two factors we can start writing the binomials as (2x + ?)(x + ?)

now c = 3 and the only two factors would be 3*1 = 3

so you have 2 and 1  as well as 3 and 1.

If the middle number is 7, I can take 2*3 = 6  and 1*! = 1 so 6+1=7

If I put them in factored form, I get (2x+1)(x+3).

Does that make sense?

Melissa drove at an average speed of 45 mi/h from her home in Memphis to visit her sister in Atlanta.

Melissa drove at an average speed of 45 mi/h from her home in Memphis to visit her sister in Atlanta. She stayed in Atlanta 10 hours, and on the trip back averaged 60 mi/h. She returned home 43 hours after leaving. How many miles is Memphis from Atlanta?

a) Write an equation using the information as it is given above that can be solved to answer this question. Use t as your varible to represent the amount of time Melissa spent driving from Memphis to Atlanta.
Equation:

b) How many miles is Memphis from Atlanta?

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Asked by Treena from Fox Island, WA
00

First, this is a Distance = rate * time equation problem

First you have 45mph at an x amount of hours and 60 mph at a y amount of hours.

The total trip including her stay was 43 hours.

From that we can conclude x + y + 10 = 43

We also can conclude that D = 45(x) and D = 60(33-x) because travel time only was 33 hrs

From that D = D so 45x = 1980 - 60x

Simplify 105x = 1980

Simply x = 18.9[...] hours thus the distance would be

PS: Do not round until final answer

The equation of the horizontal line that passes through the point (-2, -1).

The answer I got is  x= -2. Am i right?

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Asked by Amy from Titusville, FL
00

No, and this is why.

If you were to plot that point, you would start at the origin and go left two, down one.

Looking at the Cartesian Plane, a horizontal line going through that point would occur at  y = -1

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