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
olchik [2.2K]
3 years ago
7

What is correct answer to -5-(-8)=

Mathematics
2 answers:
tino4ka555 [31]3 years ago
8 0

Answer:

3

Step-by-step explanation:

Cerrena [4.2K]3 years ago
7 0

Answer:

3

Step-by-step explanation:

To solve this, we first use the rule:

- ( - x) = x

as two negatives equal a positive.

Hence

- 5 - ( - 8) =  - 5 + 8

which you get an answer of

3

You might be interested in
HELP!! Does this graph show a function?
Leokris [45]

Answer:

Answer is C

Step-by-step explanation:

When we do the vertical line test the line intersects (cause its a circle)

This could explain better

3 0
3 years ago
Read 2 more answers
The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in t
andreyandreev [35.5K]

Answer:

The test statistic is c. 2.00

The p-value is a. 0.0456

At the 5% level, you b. reject the null hypothesis

Step-by-step explanation:

We want to test to determine whether or not the mean waiting time of all customers is significantly different than 3 minutes.

This means that the mean and the alternate hypothesis are:

Null: H_{0} = 3

Alternate: H_{a} = 3

The test-statistic is given by:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

Sample of 100 customers.

This means that n = 100

3 tested at the null hypothesis

This means that \mu = 3

The average length of time it took the customers in the sample to check out was 3.1 minutes.

This means that X = 3.1

The population standard deviation is known at 0.5 minutes.

This means that \sigma = 0.5

Value of the test-statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{3.1 - 3}{\frac{0.5}{\sqrt{100}}}

z = 2

The test statistic is z = 2.

The p-value is

Mean different than 3, so the pvalue is 2 multiplied by 1 subtracted by the pvalue of Z when z = 2.

z = 2 has a pvalue of 0.9772

2*(1 - 0.9772) = 2*0.0228 = 0.0456

At the 5% level

0.0456 < 0.05, which means that the null hypothesis is rejected.

7 0
3 years ago
Please hellp meeee!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Keith_Richards [23]

Answer:

The surface area of the figure is 124

Step-by-step explanation:


5 0
3 years ago
Read 2 more answers
4(x-11)^2=25
netineya [11]
Expand the square: 4(x-11)^ =25
4(x-11)(x-11)=25

Distribute : 4(x-11)(x-11)=25
4(x(x-11)-11(x-11))=25

Distribute: 4(x(x-11)-11(x-11))=25
4(x^-11x-11(x-11))=25

Solution: x=17/2
x=27/2

hope that helps
8 0
2 years ago
Potatoes are 50p a pound . how much for 24oz​
Tems11 [23]

Answer:

25p

Step-by-step explanation:

IM NOT SURE IF ITS RIGHT BUT THAT WHAT I THINK. HAVE A NICE DAY!

8 0
2 years ago
Read 2 more answers
Other questions:
  • Helpppppppppppppppppppppppppppppppppp
    14·1 answer
  • Given a normal distribution with mu equals 100μ=100 and sigma equals 10 commaσ=10, complete parts​ (a) through​ (d). loading...
    9·1 answer
  • A 96 foot tree casts a shadow that is 120 feet long. What is the angle of elevation of the sun? Round to the nearest degree.
    14·1 answer
  • Use only the associative property of addition to rewrite the expression − 41 + ( − 27 + 2 ) and then simplify.
    15·1 answer
  • Solve for x.<br><br><br><br> x/7 + 9 = 15
    8·2 answers
  • Canada has a population that is about 1/10 as large as the United States. If Canada's population is about 32 million, about how
    12·1 answer
  • Find the slope of the line with these two pair of points (10,-5) and (8,-7)
    8·1 answer
  • Select all numbers that have an absolute value of 12 Choose all answers that apply:
    15·2 answers
  • Help what does this mean please answer fast
    14·2 answers
  • The aquarium has 10 more red fish than blue fish. 60 percent of the fish are red. How many blue fish are in the aquarium? Show y
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!