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
alexandr1967 [171]
3 years ago
15

7th grade math please help would be nice

Mathematics
1 answer:
Mama L [17]3 years ago
5 0

Answer:

B

Step-by-step explanation:

You might be interested in
A complex electronic system is built with a certain number of backup components in its subsystems. One subsystem has four identi
Tcecarenko [31]

Answer:

a. 0.1536

b. 0.9728

Step-by-step explanation:

The probability that a component fails, P(Y) = 0.2

The number of components in the system = 4

The number of components required for the subsystem to operate = 2

a. By binomial theorem, we have;

The probability that exactly 2 last longer than 1,000 hours, P(Y = 2) is given as follows;

P(Y = 2) = \dbinom{4}{2} × 0.2² × 0.8² = 0.1536

The probability that exactly 2 last longer than 1,000 hours, P(Y = 2) = 0.1536

b. The probability that the system last longer than 1,000 hours, P(O) = The probability that no component fails + The probability that only one component fails + The probability that two component fails leaving two working

Therefore, we have;

P(O) = P(Y = 0) + P(Y = 1) + P(Y = 2)

P(Y = 0) = \dbinom{4}{0} × 0.2⁰ × 0.8⁴ = 0.4096

P(Y = 1) = \dbinom{4}{1} × 0.2¹ × 0.8³ = 0.4096

P(Y = 2) = \dbinom{4}{2} × 0.2² × 0.8² = 0.1536

∴ P(O) = 0.4096 + 0.4096 + 0.1536 = 0.9728

The probability that the subsystem operates longer than 1,000 hours = 0.9728

4 0
2 years ago
3 part question. If answer all(brainilest will be given.
docker41 [41]

Answer:

1. 1080

2. It shows the initial debt, i.e., $1080

3.24 months

8 0
3 years ago
I know he is incorrect but I just can’t say why please help
egoroff_w [7]

Answer:


Step-by-step explanation:

Umm, Wheres Tanner's graph? Please post it so that I could answer your question!! :)

3 0
3 years ago
3^x grows faster than x^3. Explain why.
Allisa [31]
Because 3 is a number and the x is unknow so its just an exponent the x ^ 3 grows three each time

3 0
3 years ago
(7)(8)(9)<br><br> Geometry<br><br> Check Ans<br><br> 7) s = 15<br> 8) y = 64 x = 99<br> 9) 96
Katyanochek1 [597]
Problem 7: Correct
Problem 8: Correct
Problem 9: Correct

The steps are below if you are curious

===========================================================================================

Problem 7

S = 180*(n-2)
2340 = 180*(n-2)
2340/180 = n-2
13 = n-2
n-2 = 13
n = 13+2
n = 15

I'm using n in place of lowercase s, but the idea is the same. If anything, it is better to use n for the number of sides since S already stands for the sum of the interior angles. I'm not sure why your teacher decided to swap things like that.

===========================================================================================

Problem 8

First find y
y+116 = 180
y+116-116 = 180-116
y = 64

which is then used to find x. The quadrilateral angles add up to 180*(n-2) = 180*(4-2) = 360 degrees
Add up the 4 angles, set the sum equal to 360, solve for x

x+y+125+72 = 360
x+64+125+72 = 360 ... substitution (plug in y = 64)
x+261 = 360
x+261-261 = 360-261
x = 99

===========================================================================================

Problem 9

With any polygon, the sum of the exterior angles is always 360 degrees

The first two exterior angles add to 264. The missing exterior angle is x
x+264 = 360
x+264-264 = 360-264
x = 96

6 0
3 years ago
Other questions:
  • Rad 18x^5y + Rad 32xy^3 - Rad 128xy
    13·1 answer
  • Anton took out a 20-year loan for $90,000 at an APR of 10.5% compounded monthly, approximately what would be the total cost of h
    6·2 answers
  • What is the correct ratio in terms of feet, in simplest form? Explain or show your work
    13·1 answer
  • A 13 foot ladder is leaning against a wall. If the height of the ladder against the wall is 2 feet more than twice the distance
    12·1 answer
  • Write each ratio in simplest form<br> 64:40
    7·2 answers
  • Is the relationship shown by the data linear? How can you tell if it is or is not? If so, model the data with an equation.
    6·1 answer
  • Mr. Frank has 1.08 kilograms of fertilizer for the plants in his nursery. He wants every plant to get 98 mg of fertilizer 4 time
    10·2 answers
  • Bridges in mathematics grade4 student book answer key
    6·1 answer
  • An object is thrown down with an initial velocity of 8 ft/sec. When will the object have fallen 120 feet?
    7·1 answer
  • <img src="https://tex.z-dn.net/?f=4%284x-4%29%2Bx%2B4%3D-46" id="TexFormula1" title="4(4x-4)+x+4=-46" alt="4(4x-4)+x+4=-46" alig
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!