Algebra 1
posted by Maria .
My little sister needs help on her homework and I don't remember really how to do this. I can't tell her if the answers or if she is doing them is the correct way. So if you could please tell me the answer and how you got it that would be great!

1.A ticket service is selling tickets to a concert. An order of 4 tickets has a price of $63 and an order of 6 tickets has a price of $91. Write an equation to find the price of any amount of tickets.
A.y = 9x
B.y = 32x
C.y = 14x + 7
2.A rental car company charges $75 for a 3day rental and $155 for a 7day rental. Write an equation to find the amount that the rental car company will charge for any number of days.
A.y = 20x + 15
B.y = 15x  20
C.y = 25x
3.Write the pointslope form of an equation of the line that passes through (2, 3) and has a slope of m = 3.
A.(y  2) = 3(x + 3)
B.(y  3) = 3(x + 2)
C.(y + 3) = 2(x + 2)
4.Write the slopeintercept form of an equation of the line that passes through
(3, 5) and has a slope of 6
A. y = 2x  6
B.y = 6x  13
C.(y  5) = 6(x  3)
5. State the domain of the function y=3/x
A. D: x ≠ 0
B.D: x <0
C.D: all real numbers

Algebra 1 
Steve
1.
Since adding 2 tickets increases the cost by $28, tickets must cost $14 each. The only logical choice is thus (C).
Check: 14*4+7 = 56+7=63 and 14*6+7=84+7=91
2.
This is exactly the same problem, just different numbers. Increasing the days by 4 raises the cost by $80,meaning $20/day. Choice (A)
3.
The slope between two points is m=∆y/∆x where ∆ means "change in"
So, the slope between (x,y) and any point on the line is the same value: 3.
In particular, the slop between (x,y) and (2,3) is 3. Symbolically, that is
(y3)/(x+2) = 3
or, (y3) = 3(x+2)
Choice (C)
4.
This one starts the same way, getting you to:
(y5)=6(x3)
However, they asked for the slopeintercept form, y=mx+b. So, solve for y:
y5=6x18
y=6x13
Choice (B)
5.
Division by 0 is not defined, so 3/x is not defined when x=0.
So, choice (A)
Respond to this Question
Similar Questions

Home Economics/Science
Hi i just needed a little help with my Home Eco homework,could u help me please. here are the questions: what is the social,economical,ittellectual,cultural,protective,security functions of a family. please tell in paragraphs for each … 
English expression
Do you have a sister? Yes, I do. I have a brother and a sister. Do you have any brothers and sisters? 
psychology
You are likely to be seeing regression when maria, the first born, reacts to the birth of her new sister by A pleading with mom to let her help with the baby B suddenly having ''accidents'' well after she's been potty trained C making … 
Calculus (pleas help I really need to check this)
Assume that each of the follwing functions gives the position of an object at time t. Find the velocities indicated by setting up and evaluating a limt algebraically. (a) s(t) = 3t^2, Find v(1). (b) s(t) = 1/t , Find v(2). (c) s(t) … 
Writing
Can you grade me out of 12 points? Did I have any voice? 
English
I included my doubts in brackets. I really hoe you can check them, too. 1)Mary uses the internet mainly to carry out school research in History, Geography and Science. 2)Whenever she needs to get (new) information/facts, she looks … 
Math
Jhonatan ate 9/12 of a hotdog, he saved 4/9 of it for his little sister. How much of the hot dog did his little sister eat? 
Biology for sister
my sister need help with biology homework she need to describe ecology of amoeba, paramecium, and diatom. telling where it be found. how it meet it nutritional needs using and explaining with the right terminology like autotrphic, … 
English
How many are there in Sonya's family? 1. There are four in her family:her father, mother, her little sister and her. 2. There are four in her family:her father, mother, her little sister and she. 3. There are four in her family:her 
Math
Selina has a homework consisting of 4 questions.In each question,she needs to find the value of each power.When she turns in her homework,her teachers say she got tree correct answers of which of the following values did she calculate …