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Viefleur [7K]
3 years ago
12

A roast beef sandwich costs $6.75. A customer buys multiple roast beef sandwiches. Write an equation that represents the situati

on. Use $x$ to represent the number of roast beef sandwiches. Then determine how many sandwiches the customer buys. Amount Used for Payment $50 Change Received $16.25 An equation that represents this situation is . The customer buys sandwiches.
Mathematics
1 answer:
rewona [7]3 years ago
7 0

Answer:

Number of roast beef sandwiches bought = 5

Step-by-step explanation:

Cost of a roast beef sandwich = $6.75

x = number of roast beef sandwiches bought

Amount Used for Payment = $50

Change Received = $16.25

Actual amount paid = Amount Used for Payment - Change Received

= $50 - $16.25

= $33.75

Actual amount paid = $33.75

Number of roast beef sandwiches bought = Actual amount paid / Cost of a roast beef sandwich

= $33.75 / $6.75

= 5 roast beef sandwiches

Number of roast beef sandwiches bought = 5

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A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a s
Umnica [9.8K]

Answer:

88.51 is the minimum score needed to receive a grade of A.          

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73

Standard Deviation, σ = 11

We are given that the distribution of exam grades is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

We have to find the value of x such that the probability is 0.0793.

P( X \geq x) = P( z \geq \displaystyle\frac{x - 73}{11})=0.0793  

= 1 -P( z \leq \displaystyle\frac{x - 73}{11})=0.0793  

=P( z \leq \displaystyle\frac{x - 73}{11})=0.9207  

Calculation the value from standard normal z table, we have,  

P(z \leq 1.410) = 0.9207

\displaystyle\frac{x - 73}{11} = 1.410\\x =88.51  

Hence, 88.51 is the minimum score needed to receive a grade of A.

3 0
2 years ago
What is the equation 1.45x=0
Sergio [31]
1.45X=0
1.45 1.45


U divide 1.45 in each side 1.45 divided by 1.45 =x
And 1.45 divided by 0 is of course 0 cuz anything divided or
Multiplied by 0 Is always 0
Ur answer is X=1.35
3 0
2 years ago
Hector is visiting a cousin who lives 350 miles away he has driven 90 miles how many more miles does it take to drive to reach h
bija089 [108]
260 more miles,since 350-90=260
8 0
3 years ago
A total of h males and (h - 2) females visit the museum on a certain day. If total of visitors for that day is 80, what is the v
Akimi4 [234]

Given:

Number of males = h

Number of females = (h-2)

Total number of visitors = 80

To find:

The value of h.

Solution:

We have,

Number of males = h

Number of females = (h-2)

So, the total number of visitors is:

Total=h+(h-2)

Total=2h-2

It is given that the total number of visitors is 80. So,

2h-2=80

2h=80+2

2h=82

Divide both sides by 2.

h=\dfrac{82}{2}

h=41

Therefore, the correct option is D.

3 0
3 years ago
56 with 75% increase
valina [46]

Answer:133

Step-by-step explanation:

7 0
3 years ago
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