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Andrei [34K]
3 years ago
7

How much money did tommys class collect

Mathematics
1 answer:
Anastaziya [24]3 years ago
6 0
B. 7.50 is the answer
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Bob purchased 2 hot dogs and 1 hamburger for S10. Later that day, Bob had to purchase more food and
Tom [10]

Answer:

Hotdog: $3.00

Hamburger: $4.00

Step-by-step explanation:

For the first time that Bob buys food, we can make an equation to find how much a single hotdog and a single hamburger costs, where:

x = cost of a hotdog

y = cost of a hamburger

He bought 2 hotdogs and 1 hamburger for $10, so the equation for his first time buying food is:

2x + y = 10

For the second time buying food, he bought 1 hotdog and 3 hamburgers for $15, so his equation would be:

x + 3y = 15

To find the value for x and y we need to solve this system of equations using the two equations we just came up with. We can do this multiple ways, but I'll be demonstrating the substitution method.

Using the second equation, we can solve for x by simply subtracting 3y from both sides:

x = 15 - 3y

We can then insert this value of x into the first equation so that way we are only dealing with one variable to solve - y:

2(15-3y) + y = 10

Distribute out the 2 into the paratheses, combine like terms, and then solve for y:

30 - 6y + y = 10

30 - 5y = 10

-5y = -20

y = 4

This means the cost for one hamburger is $4. But we still need to find the price of one hotdog, so we can insert this value of y into the equation we came up with earlier for x, and then solve for x:

x = 15 - 3y

x = 15 - 3(4)

x = 15 - 12

x = 3

So the price of one hotdog is $3 and the price of one hamburger is $4. Hope this helps.

3 0
2 years ago
No one will answer this probably wasting my points XD) Spunky the terrier is chasing a chicken. Spunky runs at a rate of r feet
Vesna [10]
It sucks that points have to be used in order to post questions. 

Openstudy - the company that merged into Brainly -  was much better.

Anyway, I think that the answer to this question is A. I'm not sure, though.
4 0
2 years ago
A model rocket was launched from the ground and shot 150 feet straight up.It then fell back down to the ground and landed in the
Elena L [17]
The list of choices you included doesn't have any correct expressions on it.

-- If the rocket went straight up, and then dropped back at the same place
it was launched from, then it must have dropped straight down.

-- The route it followed on the way down was exactly the same as the
route it followed on the way up.

-- Since it reached a maximum height of 150-ft from the ground
and the route was straight, the length of the route was 150-ft.

-- (150-ft going up) plus (150-ft coming down)  =  300-ft traveled all together.
8 0
3 years ago
What is the unit rate for $4.75
Softa [21]

Answer:

2.436

Step-by-step explanation:

It’s Right Trust me

4 0
2 years ago
Help in maths question
Rom4ik [11]
Volume of the orange juice in the carton = 10*6*8 = 480 cm^3

when its turned on its side  we have the equation 6*20*h = 480   where h = required height
h = 480 / (6*20) = 480 / 120 = 4 cms

answer = 4 cm
5 0
3 years ago
Read 2 more answers
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