Approximately how many inches are in 2500 millimeters?
Which relationship between x and y in the equation shows a proportional relationship? A) y=x2+3
B) y=12x
C) y=12x
D) y=2x+6
Answer:
y = 12x
Stepbystep explanation:
A proportional relationship is one where the graph is a straight line through the origin (0,0). If you plot some points using this relation you'll juust this
Two sides of a rectangle are x  7 and 2x + 1. Write an expression that represents the perimeter of this rectangle.
Answer:
Stepbystep explanation:
So first we have to know that a rectangle is a shape with 4 sides in which 2 of each of the 4 sides are equal to each other. So, if the base of the rectangle is for example, 3 meters then the top of the rectangle would be three meters. This is the same with each sides of the rectangle. Basically, the sides parallel to one another are equal.
So, you could represent the perimeter with an expression as such:
P = 2h + 2k
Where h is the length of the rectangle and k is the "height" or one side of the rectangle.
So here we have x7 and 2x+1
So we can just fill this in as our h and k
P = 2(x7) + 2(2x+1)
P = 2x14 + 4x + 2
P = 6x12
So the expression representing the perimeter is 6x12
Answer:
6x12
Stepbystep explanation:
2(x7)+2(2x+1)
2x14+4x+2
6x14+2
6x12
2x+y=4
Y=3x1
Is (1,2) a solution to both equations
Answer:
yes they are
Stepbystep explanation:
Just test it
2x+y=4
(1,2)
1 is x
2 is y
2+2=4
y=3x1
31=2
X=1 y=2................
Explain why solving (2/5)c = (8/9) by multiplying both sides by (5/2) is the same as solving it by dividing both sides by (2/5)
10) Mr. Ramirez sold 20 tickets to a concert and made $210. He sold adult tickets (x) and children tickets (y). Mr. Ramirez sells adult tickets for $12 each and children tickets are $6.
Define your variable: = /
ve
Create a system of equations:

416)=12y + 210
10
4 y = 12x+ 204
Y=17
After solving the system, they sold
adult tickets and L
child tickets.
My father owned a gas station. He generally didn't have much use for math beyond arithmetic, but he once asked me a similar question. Dean, he said, I changed the price of regular gas today from 119.99 to 123.99 (cents per gallon). According to the pump we pumped 1700 gallons exactly for a revenue of $2058.03. How much gas did we sell at each price?
I was happy to solve this math problem for him and I'm happy to solve it for you.
Define your variables
x = # adult tickets, y = # children tickets
Create a system of equations:
He sold 20 tickets, so we write the equation:
x + y = 20
He made $210 selling adult tickets for $12 and children tickets for $6:
210 = 12x + 6y
Solve the system
We multiply the first equation by 6.
120 = 6x + 6y
We subtract from the second equation,
90 = 6x
x = 90/6 = 15
y = 20  x = 5
Answer: Sold 15 adult tickets, 5 children tickets
They left out an important part:
Check
15 + 5 = 20, good
12(15) +6(5) = 180 + 30 = 210, good
Is 24/8 a rational number
Answer:
Yes
Stepbystep explanation:
A rational number is a number that could be written in fraction form or ratio.
What is the product of 0.42 and 0.03?
A skier is trying to decide whether or not to buy a season ski pass. A daily pass costs $79. A season ski pass costs $300. The skier would have to rent skis with either pass for $20 per day. How many days would the skier have to go skiing in order to make the season pass less expensive than the daily passes?
Answer:
4
Stepbystep explanation:
With either pass you have to add $20 per day, so you can ignore that
Assuming he goes "x" days to sky you can calculate the days he has to go to equal $300.
300 = 79x
x = 300/79 = 3.8 days
If he goes 4 days to sky it costs 316, so in that case its cheaper to buy the season pass