Please please help! Final tomorrow! easy algebra 1-2 questions
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Please please help! Final tomorrow! easy algebra 1-2 questions

[From: ] [author: ] [Date: 11-06-07] [Hit: ]
700 people went to the theatre and $1375 was collected. Using equation below, determine how many children and how many adults attended the show.2.5x+1.25y=1375x+y=700how do i do this?......

2)which system of equations represents a pir of parallel lines and no solution:
i know the answer is:
3x-3y=6
2x-5y=-8

Linear equations that represent parallel lines have the same slope. You need to get y by itself in both equations to make slope-intercept form.

3)The admission fee of a theatre is $2.50 for adults and $1.25 for children. O a certain day, 700 people went to the theatre and $1375 was collected. Using equation below, determine how many children and how many adults attended the show.

2.5x+1.25y=1375
x+y=700

how do i do this?

Get y by itself in both equations and then make the equations equal to each other.

4) What is the simplified form of (square root sign will be used as **) *xy(3 power)* x *x(3 power)y*?

If I understand correctly what you mean, you need to multiply the xs and ys together to get *x(power of 5)y(power of 4). Next, you must simplify the radicals by making the x the square root of x^4 and the square root of x, and y the square root of y^4, making it x^2 times the square root of x times y^2, because x^2 and y^2 are the square roots of x^4 and y^4 but x has no square root, so it stays x*. Sorry if that was hard to understand, it's hard to explain via the computer.

5) given the equation: y=3x-4 which equation would give you a system of equations with perpendicular lines and one solution?
The answer is: y= -1/3x + 3
how do i find this out?

The perpendicular line of an equation is its negative slope reversed. For example, any equation with a slope of 3x would be perpendicular to your equations.

5)Given the equation: y=3x-5 which equation forms a system of equations that (2,1) is the only solution?
The answer is: 2x-3y=1
how do i figure this out?

For this one, you were probably given multiple choice, right? You just need to sub the points in in the equations you are given, with 2 substituting x and 1 substituting y, so that it turns out like this:

2x-3y=1
4-3=1
1=1 --- the equation works out

6)the value (3 power)*90* is between what 2 integers?
how do i figure this out?

I don't really understand what you mean? Could you please phrase the equation differently?

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for 2 the easyiest way is to draw out a + graph and acually draw out the lines and see if the are parrelllel. there is a way with an equation but i suck at math
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