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
Alborosie
2 years ago
8

Solve 4/7- (-4/7)A. 8/7B.-8/7C.-4/7D.4/7​

Mathematics
2 answers:
Papessa [141]2 years ago
6 0

Answer:

A. 8/7

Step-by-step explanation:

mart [117]2 years ago
3 0

Answer:

A. 8/7

Step-by-step explanation:

<h3>Step 1     </h3>

4/7 - (-4/7) --> 4/7 + 4/7

The two minutes turn into a plus, removing the bracket.

<h3>Step 2</h3>

4/7 + 4/7 = 8/7

Add the two fractions together.

You might be interested in
4. The results of testing a new drug on 1,000 people with a certain disease found that 510 of them improved when they used the d
Shalnov [3]

Answer:

It would not be reasonable to say that  more than half of the people with this disease would  improve if they used the new drug

Step-by-step explanation:

Data provided in the question:

Sample size,  n = 1000

Number of people improved when they used the drug = 510

Thus,

Probability that Number of people improved when they used the drug

= 510 ÷ 1000

= 0.510

Now,

margin of error, E = 2\times\sqrt{\frac{p(1-p)}{n}}

= 2\times\sqrt{\frac{0.510(1-0.510)}{1000}}

= 0.032 = 3.2%

Therefore,

Portion of 0.510 is likely to lie in the 3.2% of the actual value of population

And,

The lower portion can be as small as p - E

= 0.510 - 0.032

= 0.478 i.e 47.8% of the sample

Hence,

It would not be reasonable to say that  more than half of the people with this disease would  improve if they used the new drug

4 0
3 years ago
You have 9 chairs arranged in a circle, and wish to seat 9 people (one person per seat). The one constraint is that person A can
stiv31 [10]

Answer:

30240 number of ways are there to seat them

Step-by-step explanation:

Total number of ways of arranging 9 people on 9 chairs  in circular manners = (9-1)! = 8! =

number of ways A sit always sit next to B = AB together makes a single and

                                                                       therefore total number of arrangements for this  = 7+(AB) = 8  that is 8  persons sitting in circular manner

number of ways = (8-1)! =7! = 5040

likewise number of arrangements for A and C will be = 5040

Total number of ways such that A cannot sit next to B or C = total ways of 9 persons - total number of A always sitting next to B - total number of ways always sitting next to C  = 8! - 7!-7!

                                        = 40320- 5040-5040

                                        = 30240

=  

5 0
3 years ago
PLSS HELP IF YOU TURLY KNOW THISS
yaroslaw [1]

Answer:

x = 11

Step-by-step explanation:

(0.3x - 2.1)/3 = 0.4

0.3x - 2.1 = 0.4 * 3

0.3x - 2.1 = 1.2

0.3x = 1.2 + 2.1

0.3x = 3.3

x = 3.3/0.3

x = 11

6 0
3 years ago
Read 2 more answers
1/2(14)(5) what is the answer
VMariaS [17]
Use the Order of Operations.
1/2(14)(5)
1/2(70)
35

The answer is: 35
3 0
3 years ago
Read 2 more answers
In a parallelogram PQRS, if angle P = (2x+25) degrees and angle Q = (3x-5) degrees, then write the measures of angle S and angle
krek1111 [17]

Consecutive angles of a parallelogram are supplementary, so:

2x+25+3x-5=180\\5x+20=180\\5x=160\\x=32

This means m\angle P=2(32)+25=89^{\circ} and that m\angle Q=3(32)-5=91^{\circ}.

Since opposite angles of a parallelogram are congruent,

\boxed{m\angle S=91^{\circ}, m \angle R=89^{\circ}}

6 0
2 years ago
Other questions:
  • (1.7)(1.7) what does this equal
    12·1 answer
  • I still don't get how to do this: Solve for t then simplify your answer. -6/5t=9
    12·2 answers
  • an 8.5 centimeter green bean pod contains peas that average 0.45 centimeter in diameter. how many peas are in the pod?
    10·2 answers
  • Twice a number, decreased by nineteen
    14·1 answer
  • Evaluate x+(−21) when x=−27.
    11·1 answer
  • Describe this triangle by its sides and by its angles.
    10·1 answer
  • Cameron picked two pairs of shorts and three T-shirts’ for a weekend trip. What are some combinations of shirts and shorts that
    10·1 answer
  • Think of 5 positive integers that have a mode of 4, a median of 8, a mean of 9 and a range of 12 what are the 5 integers
    14·1 answer
  • The right triangle on the right is a scaled copy of the right triangle on the left. Identify
    6·1 answer
  • Solve the equation: 3/8g + 2 = 5
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!