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
FrozenT [24]
3 years ago
6

Plz ASAP Which expression is equivalent to -8

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
8 0

Answer:

Option "B" is the correct answer to the following question.

Step-by-step explanation:

(\frac{-1}{2} )^{-3}

-2\times -2\times -2

(\frac{1}{a} )^{-m}= a^m

So,

(\frac{-1}{2} )^{-3} = (-2)^3\\\\(-2)^3 = -2\times -2\times -2\\\\ -2\times -2\times -2=-8

Therefore, Option "B" is the correct answer

You might be interested in
Layla used 0.482 grams of salt in her experiment. Maurcie use 0.51 grams of salt. Who used the greater amount of salt?
Montano1993 [528]
All you do is look at the first number and see which is greater than you will get your answer glad to help btw if you cant get it it's Maurice
7 0
3 years ago
Read 2 more answers
 A barrel contains 56 litres of kerosene. It has two taps. One tap draws 500 ml every 6 minutes. After first 5 litres are drawn
tigry1 [53]

Answer:

The tank will empty in 4 hours.

Step-by-step explanation:

Since a barrel contains 56 liters of kerosene, and it has two taps, one tap that draws 500 ml every 6 minutes and after first 5 liters are drawn from the barrel, the second tap also starts, and it draws 1 liter in every 5 minutes, to determine how many hours will be taken in all to empty the tank, the following calculation must be performed:

0.5 x X = 5

X = 5 / 0.5

X = 10

10 x 6 = 60

1 hour = 51 liters

1 hour 30 minutes = 51 - (1 x 6) - (0.5 x 5) = 42.5

2 hours = 42.5 - (1 x 6) - (0.5 x 5) = 34

2 hours 30 minutes = 34 - (1 x 6) - (0.5 x 5) = 25.5

3 hours = 25.5 - (1 x 6) - (0.5 x 5) = 17

3 hours 30 minutes = 17 - (1 x 6) - (0.5 x 5) = 8.5

4 hours = 8.5 - (1 x 6) - (0.5 x 5) = 0

Therefore, the tank will empty in 4 hours.

3 0
3 years ago
A cigarette industry spokesperson remarks that current levels of tar are no more than 5 milligrams per cigarette. A reporter doe
d1i1m1o1n [39]

Answer:

t=\frac{5.63-5}{\frac{1.61}{\sqrt{15}}}=1.516  

df=n-1=15-1=14  

Since is a right tailed test the p value would be:  

p_v =P(t_{14}>1.516)=0.076  

If we use a significance level of 0.05 we see that p_v > \alpha and then we can conclude that we don't have evidence in order to conclude that the mean is higher than 5.63, so then the claim makes sense.

Step-by-step explanation:

Data given and notation  

\bar X=5.63 represent the sample mean  

s=1.61 represent the standard deviation for the sample  

n=15 sample size  

\mu_o =15/tex] represent the value that we want to test  
[tex]\alpha represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses to be tested  

We need to conduct a hypothesis in order to determine if the average is more than 5.63, the system of hypothesis would be:  

Null hypothesis:\mu \leq 5.63  

Alternative hypothesis:\mu > 5.63  

Compute the test statistic  

We don't know the population deviation, so for this case is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

We can replace in formula (1) the info given like this:  

t=\frac{5.63-5}{\frac{1.61}{\sqrt{15}}}=1.516  

Now we need to find the degrees of freedom for the t distribution given by:

df=n-1=15-1=14  

P value

Since is a right tailed test the p value would be:  

p_v =P(t_{14}>1.516)=0.076  

If we use a significance level of 0.05 we see that p_v > \alpha and then we can conclude that we don't have evidence in order to conclude that the mean is higher than 5.63, so then the claim makes sense.

3 0
3 years ago
find the distance between city A and city B if there 15 cm apart on the map with a scale of 2 cm: 16 km
IRISSAK [1]

Answer:

120 km

Step-by-step explanation:

15/2=7.5

7.5 km x 16= 120km

Have a great day!

7 0
3 years ago
Vichy reads at a constant rate. She can read 5 pages
vagabundo [1.1K]

Answer:

p = (5t)/9

Step-by-step explanation:

 9 mins ---------- 5 pages

1 min -------------5/9 page

t mins ------------5/9 x t pages

Thus

p = (5t)/9

7 0
3 years ago
Other questions:
  • The function f(x) = 2x -3 is changed to f(x)+k. The new function f(x) can be represented by the graph below. What is the value o
    5·1 answer
  • + x = 12 – 2x<br> what is this?
    5·2 answers
  • How do you write 42% , 72% , 88% , and 35% as a fraction in simplest form.
    10·2 answers
  • A triangle has sides of length 6, 8, and 10. Is it a right triangle? Explain.
    14·2 answers
  • What is the difference between "x times x"  and "x plus x"?
    5·2 answers
  • Can someone help me solve this problems
    8·1 answer
  • What is the x intercept of the line?
    6·1 answer
  • HELP!
    14·2 answers
  • How do you solve 21r &lt; 7?
    13·2 answers
  • Robin draws a square with a measure of (x + 2) inches on each side. The perimeter of each square is 96 inches. The equation belo
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!