1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Komok [63]
3 years ago
11

At a concession stan,one hot dog and one hamburger cost $2.75, one hot dog and seven hamburgers cost $11.75. Find the cost of on

e hot dog and one hamburger I need help with this question, I try so hard to get the answers and I can't
Mathematics
1 answer:
lawyer [7]3 years ago
8 0
Variables:
cost of 1 hot dog = x
cost of 1 hamburger = y

Set up a system of equations and use substitution

x + y = 2.75
x + 7y = 11.75

x + y = 2.75 can be rewritten as y = -x + 2.75

x + 7 (-x + 2.75) = 11.25

-6x + 19.25 = 11.25

-6x = -8

x = .75

plug x back into other equation to find y

y = -.75 + 2.75

y = 2.00

1 hot dog = $0.75
1 hamburger = $2.00

You might be interested in
(7z^3+42z^2-15z+1)- (36z^2+12z-21)​
My name is Ann [436]

Answer:

7z^3+6z^2-27z+22

Step-by-step explanation:

The given question is of subtraction:

So,

(7z^3+42z^2-15z+1)- (36z^2+12z-21)​

=7z^3+42z^2-15z+1-36z^2-12z+21

Combining alike terms to simplify

=​7z^3+42z^2-36z^2-15z-12z+1+21

=7z^3+6z^2-27z+22

So the answer in simplified form is:

7z^3+6z^2-27z+22 ..

6 0
3 years ago
Read 2 more answers
Adam used 1.8 pieces of paper to make this project he decorated 0.2 of each piece of paper with different colors . how many sect
qaws [65]
Adam had 9 sections in his art project.
3 0
3 years ago
Reagan scored 1140 on the SAT. The distribution of SAT scores in a reference population is normally distributed with mean 1000 a
krok68 [10]

Answer:

Jessie scored higher than Reagan.

Step-by-step explanation:

We are given that Reagan scored 1140 on the SAT. The distribution of SAT scores in a reference population is normally distributed with mean 1000 and standard deviation 100.

Jessie scored 30 on the ACT. The distribution of ACT scores in a reference population is normally distributed with mean 17 and standard deviation 5.

For finding who performed better on the standardized exams, we have to calculate the z-scores for both people.

1. <u>Finding z-score for Reagan;</u>

Let X = distribution of SAT scores

SO, X ~ Normal(\mu=1000, \sigma^{2}=100^{2})

The z-score probability distribution for the normal distribution is given by;

                                    Z  =  \frac{X-\mu}{\sigma}  ~ N(0,1)

where, \mu = population mean = 1000

            \sigma = standard deviation = 100

Now, Reagan scored 1140 on the SAT, that is;

       z-score  =  \frac{1140-1000}{100}  =  1.4

2. <u>Finding z-score for Jessie;</u>

Let X = distribution of ACT scores

SO, X ~ Normal(\mu=17, \sigma^{2}=5^{2})

The z-score probability distribution for the normal distribution is given by;

                                    Z  =  \frac{X-\mu}{\sigma}  ~ N(0,1)

where, \mu = population mean = 17

            \sigma = standard deviation = 5

Now, Jessie scored 30 on the ACT, that is;

       z-score  =  \frac{30-17}{5}  =  2.6

This means that Jessie scored higher than Reagan because Jessie's standardized score was 2.6, which is 2.6 standard deviations above the mean and Reagan's standardized score was 1.4, which is 1.4 standard deviations above the mean.

6 0
3 years ago
PLEASE HELP!!!!!!!!
Vlad [161]

Answer: C is the answer

Step-by-step explanation:

7 0
3 years ago
Por favor me podrían ayudar y dar un ejemplo de cómo llevar a cabo
iogann1982 [59]

Answer:

g

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • Which choice is equivalent to the product below
    5·1 answer
  • Let U be the set of students in a high school. The school has 800 students with 20 students on the gymnastic team and 10 student
    6·1 answer
  • How to solve 3(×-5)-5=23​
    7·2 answers
  • Is this expression 6(2r+(−1)+1 equivalent to 12r-5
    11·2 answers
  • Find the slope of the line that passes through the points. (1,2) and (-2,2)
    12·2 answers
  • What is the slope of the line passing through the points (-6, 33) and (-2, 15)?
    14·1 answer
  • -6.1 , 2.2. On a graph
    7·2 answers
  • What is the first step in solving the equation?<br><br> 14 = -2m
    15·1 answer
  • Write an equation of a line that
    5·1 answer
  • Plssssssssssssssssssssssss help
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!