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tangare [24]
2 years ago
6

HELP ASAP PLSPLSPLSPLSPLSPLSPLSPLSPLSPLSPLSPLSPLSPLS

Mathematics
2 answers:
KengaRu [80]2 years ago
8 0
The answer is B- 4.5
lyudmila [28]2 years ago
5 0

Answer:

-4.5 :):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):)

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Your group has $60 altogether for pizza. The tax is 5% and you want to leave 15% tip on the price of the food before sales tax
Tems11 [23]

Answer:

48

Step-by-step explanation:

8 0
3 years ago
Suppose a submarine is diving from the surface of the water at a rate of 80 feet per minute. Which integer represents the depth
ElenaW [278]
-80x is the the problem

In this case, x=7

-80 times 7= -560

So -560 would be the integer that represents the depth of the submarine after 7 minutes.

4 0
3 years ago
When looking at a quadratic function on a graph, whether it is down or up, the domain will always be all real numbers or does it
aniked [119]

The domain of any graph depends on the vertex as well as the asymptotes. You can easily tell if the domain is all real numbers by looking at the graph and seeing that it goes clearly from -infinity to +infinity. If there is an asymptote that blocks it, then it will not be all real numbers.

7 0
3 years ago
Need help and exact locations please, very confused
nadezda [96]

Answer:

here you go ;d

Step-by-step explanation:

4 0
3 years ago
The reported average cost per workbook at a large college is $27.50. A professor claims that the actual average cost per workboo
nadezda [96]

Answer:

We conclude that the actual average cost per workbook is higher than $27.50.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = $27.50

Sample mean, \bar{x} = $28.90

Sample size, n = 44

Alpha, α = 0.05

Population standard deviation, σ = $5.00

First, we design the null and the alternate hypothesis

H_{0}: \mu = 27.50\text{ dollars}\\H_A: \mu > 27.50\text{ dollars}

We use one-tailed z test to perform this hypothesis.

Formula:

z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

z_{stat} = \displaystyle\frac{28.90 - 27.50}{\frac{5.00}{\sqrt{44}} } = 1.8573

Now, z_{critical} \text{ at 0.05 level of significance } = 1.64

Since,  

z_{stat} > z_{critical}

We reject the null hypothesis and accept the alternate hypothesis.

Thus, we conclude that the actual average cost per workbook is higher than $27.50.

6 0
4 years ago
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