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
kolezko [41]
3 years ago
13

EASY BRAINLEST! ONLY TWO QUESTIONS I NEED HELP ASAP!!

Mathematics
1 answer:
mash [69]3 years ago
6 0

Step-by-step explanation:

When you multiply both sides by a negative value you make the side that is greater have a "bigger" negative number, which actually means it is now less than the other side! This is why you must flip the sign whenever you multiply by a negative number.

You might be interested in
Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the ot
Softa [21]

Answer:

a. Mean = 4.5, Standard Deviation = 1.775

b. 0.0152

Step-by-step explanation:

Given

n = 15 purchasers

p = Success = 30%

p = 0.3

q =Failure = 70%

q = 0.7

a.

Mean = np

Mean = 15 * 0.3

Mean = 4.5

Standard Deviation = √Variance

Variance = npq

Variance = 15 * 0.3 * 0.7

Variance = 3.15

Standard Deviation = √3.15

Standard Deviation = 1.774823934929884

Standard Deviation = 1.775 ---------- Approximated

b.

The probability that the number who want new copies is more than two standard deviations away from the mean value

Standard Deviation = 1.775

Mean = 4.5

2 Standard Deviation and Mean = 2 * 1.775 + 4.5

= 3.55 + 4.5

= 8.05

P(X>8.05) = P(9) + P(10) +........+ P(15)

Using the binomial distribution

(p + q) ^ n where p = 0.3, q = 0.7 , n = 15

Expanding (p+q)^n where n = 15 and r > 8

We have

15C9 p^9 q^6 + 15C10 p^10 q^5 + 15C11 p^11 q⁴ + 15C12 p^12 q³ + 15C13 p^13 q² + 15C14 p^14 q + p^15

= 5005 (0.3)^9 (0.7)^6 + 3003 (0.3)^10 (0.7)^5 + 1365 (0.3)^11 (0.7)⁴ + 455 (0.3)^12 (0.7)³ + 105 (0.3)^14 (0.7)² + 15 (0.3)^14 (0.7) + 0.3^15

=0.015234

7 0
3 years ago
What is the measure of the scale down below
EastWind [94]

Answer:

58 degrees

Step-by-step explanation:

It shows a square which means it is a right angle / 90 degrees. So that means because 32 degrees is already there the equation is 90 - 32 = 58 degrees.

4 0
2 years ago
Read 2 more answers
5^2 i want to know what that is.
faltersainse [42]

Answer:

25

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Absolute 10.7 of percent 11
leva [86]

Answer:   = 11.88

This is a 3 step / 4 show workings.

10.7 + Percentage increase = 11%

10.7 + (11% × 10.7) =  10.7 + 11% × 10.7

(1 + 11%) × 10.7 = (100% + 11%) × 10.7

111% × 10.7 = 111 ÷ 100 × 10.7

111 × 10.7 ÷ 100 = 1,187.7 ÷ 100

11.877 ≈ 11.88

5 0
3 years ago
The numbers 1 through 25 are written in red marker on slips of paper while the numbers 26 through 50 are written with blue marke
Gekata [30.6K]
A) \frac{27}{50}
b) <span>\frac{3}{5}</span>
6 0
3 years ago
Other questions:
  • Help, please with this question!! I don't understand!!
    11·1 answer
  • What is the value of x
    6·2 answers
  • What is 75.62-72.28=??
    10·2 answers
  • Evaluate the permutation. 6 P 2
    9·2 answers
  • What is the equivalent ratio of __: 6 = 4:3
    5·2 answers
  • Someone can help me with this one please ?
    9·1 answer
  • CAN YOU ADD 0 TO PI TO GET A RATIONAL NUMBER
    10·1 answer
  • (20x2-7x-3)-(9x2-12x-5)
    6·1 answer
  • Can you help thanks ​
    15·2 answers
  • On the first day, you walk 4 miles and burn 300 calories. The next day, you walk 3 1/3 miles and burn 250 calories.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!