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
Furkat [3]
3 years ago
10

Whats negative 12 plus negative 9 minus negative 7

Mathematics
2 answers:
alexdok [17]3 years ago
8 0
Your answer is -14!!!
alex41 [277]3 years ago
3 0

Answer:

-12-9--7= -14

Step-by-step explanation:

1 -12-9--7=

2 -21--7= (minus negative equals plus)

3 -21+7=14

You might be interested in
Ron estimates that each crate of apples he buys from his supplier has 120 apples. The actual number is 105 apples. Which value i
mojhsa [17]
I think the answer is <span>14.2857%</span>
3 0
3 years ago
Read 2 more answers
What pecent is 425 of 500
mars1129 [50]

Answer: 85

Step-by-step explanation:

Kid.

7 0
3 years ago
Read 2 more answers
he average movie admission price for a recent year was $7.18. The population variance was 3.81. A random sample of 15 theater ad
Gemiola [76]

Answer:

Since the calculated value of  z= 1.6279 does not fall in the critical region Z ≥ ±1.96 we conclude that there is no difference between the population variance and the sample variance.

Step-by-step explanation:

The data given is

Population mean μ= $ 7.18

Population variance= σ²= 3.81

Population Standard Deviation = √σ²= √3.81= 1.952

Sample Mean= x`= $ 8.02

Sample Standard Deviation =s = $ 2.08

Sample Size = 15

Significance Level = ∝= 0.05

The null and alternate hypotheses are

H0: σ1=σ2 against the claim that Ha: σ1≠ σ2

where  σ1 is the population variance and

σ2 is the sample variance

The rejection region is Z ≥ ±1.96 for two tailed test  at ∝= 0.05

The test statistic z is used

z= x`-  μ/ σ/√n

Putting the values

Z= 8.02-7.18/1.952/√15

z= 0.84/0.51599

z= 1.6279

Since the calculated value of  z= 1.6279 does not fall in the critical region Z ≥ ±1.96 we conclude that there is no difference between the population variance and the sample variance.

3 0
3 years ago
Find the complete factored form of the polynomial -24a6b4-40a3
Naddik [55]

For this case we have the following polynomial:

-24a ^ 6b ^ 4-40a ^ 3

We must find the greatest common factor of the terms of the polynomial.

The GCF of the coefficients is given by:

24 = 3 * 8\\40 = 5 * 8

Then we look for the GFC of the variables:

We have then:

a ^ 6 = a ^ 3a ^ 3\\a ^ 3 = a ^ 3

Finally rewriting we have: -24a ^ 6b ^ 4-40a ^ 3 = -8a ^ 3 (3a ^ 3b ^ 4 + 5)

Answer:

the complete factored form of the polynomial is:

-8a ^ 3 (3a ^ 3b ^ 4 + 5)

8 0
3 years ago
A survey of 1000 high school students found that 781 students own a cell phone and 133 of those students who own a cell phone al
kirza4 [7]

This question is not complete. Find attached the complete question and the figure showing the two way table.

Answer:

a. P(owns a cellphone) = 781/1000

b. P(does not own a PS4) = 421/500

c. P(owns a PS4 U does not own a cellphone) = 377/1000

d. P(owns a PS4 n does not own a cellphone) = 25/158

e. P(owns a PS4 | own a cell phone) =

158/1000

f. P(owns a cellphone | own a PS4) = 781/1000

Step-by-step explanation:

Total number of students = 1000 students

We have two variables,

1. The students who own cellphones

2. The students who own PS4

a. P(owns a cellphone)

From the question and the table, we are told that 781 people own cellphones.

Hence, P(owns a cellphone) = 781/1000

b. P(does not own a PS4)

From the attached table, we can see that the number of students that does not own a PS4 = 842

Hen P(does not own a PS4) = 842/1000 = 421/500

c. P(owns a PS4 U does not own a cellphone) =

First we find the Probability of student that owns a PS4

Number of students that own a PS4 = 158

P(owns a PS4 ) = 158/1000

Number of students that does not own a cell phone = 219

P(does not own a cell phone) = 219/1000

Therefore, P(owns a PS4 U does not own a cellphone) = P(owns a PS4 ) + P(does not own a cell phone)

= 158/1000 +219/1000

= 377/1000

d. P(owns a PS4 n does not own a cellphone) =

From the table, we obtain that as =

25/158

e. P(owns a PS4 | own a cell phone) =

P(owns a PS4 n own a cell phone) ÷ P(own a cell phone)

= P(owns a PS4)

From the table that would give us = 158/1000

f. P(owns a cellphone | own a PS4) =

P(owns a cellphone n own a PS4) ÷ P(own a PS4)

= P(owns a cellphone

From the table, this is given as :

781/1000

4 0
3 years ago
Other questions:
  • How many are 9 raised to 2 ???​
    11·1 answer
  • Find the area of the parallelogram. Write the correct units of measure for your answer
    6·1 answer
  • A bag contains 5 yellows tickets numbered 1 through 5. The bag also contains 5 green tickets numbers 1 to five. You randomly pic
    13·1 answer
  • Budget $ 150 at $ 8 each plus $10 for delivery how many pizzas van you buy
    10·1 answer
  • Please answer this if you know it ( you only have to answer the problem it’s asking)
    10·1 answer
  • Rachel is calculating the interest earned on a deposit of $350 in an account that earns 6% simple interest after 15 years. What
    6·1 answer
  • What is 2a + 3x + a + 5x =
    8·1 answer
  • BIBIDI BABIDI BUU I NEED HELP FROM YUU
    9·1 answer
  • If k=-2, what is the value of 5 - (2k-1)?
    14·1 answer
  • 3. Carmen received the following
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!