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Step2247 [10]
3 years ago
15

Jess has dinner at a restaurant. The dinner bill is B dollars. She pays a 21% tip. Match the expressions to their correct meanin

gs for Jess. Here are the possible answers 
Jess's bill amount without tip:
Jess's tip amount:
Jess's total amount: 

B+0.21; B; 2.1B; B/0.21B; 0.21B

Not all the answers will be used Please I need help Right away.
Mathematics
1 answer:
Anastaziya [24]3 years ago
8 0

It is given in the question that

Jess has dinner at a restaurant. The dinner bill is B dollars. She pays a 21% tip.

THerefore,

Jess's bill amount without tip is $ B.

Jess's tip amount is 21 % of B or 0.21B

THerefore Jess's total amount is the sum of Jess's bill amount without tip and Jess's tip amount, that is

= B+0.21 B = 1.21 B

Hence, Jess's total amount is 1.21B .

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Perimeter:

6y + 12

Area:

{2y}^{2}  + 12y

Step-by-step explanation:

Perimeter of a rectangle : P= 2( L + w)

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= 2y+12 + 4y

simplified to 6y +12

Area of a rectangle : A= LW

=(y+6)(2y)

We foil and get

{2y}^{2}  + 12y

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Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the
Levart [38]

Answer: Choice A.)   88.2 < μ < 93.0

=============================================================

Explanation:

We have this given info:

  • n = 92 = sample size
  • xbar = 90.6 = sample mean
  • sigma = 8.9 = population standard deviation
  • C = 99% = confidence level

Because n > 30 and because we know sigma, this allows us to use the Z distribution (aka standard normal distribution).

At 99% confidence, the z critical value is roughly z = 2.576; use a reference sheet, table, or calculator to determine this.

The lower bound of the confidence interval (L) is roughly

L = xbar - z*sigma/sqrt(n)

L = 90.6 - 2.576*8.9/sqrt(92)

L = 88.209757568781

L = 88.2

The upper bound (U) of this confidence interval is roughly

U = xbar + z*sigma/sqrt(n)

U = 90.6 + 2.576*8.9/sqrt(92)

U = 92.990242431219

U = 93.0

Therefore, the confidence interval in the format (L, U) is approximately (88.2, 93.0)

When converted to L < μ < U format, then we get approximately 88.2 < μ < 93.0 which shows that the final answer is choice A.

We're 99% confident that the population mean mu is somewhere between 88.2 and 93.0

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2 years ago
I got the answer D is this correct? will vote brainliest
Marina86 [1]

Answer:

yes its a correct answer hope it will help u.......

4 0
2 years ago
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