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
andreyandreev [35.5K]
2 years ago
5

The 15th term of an arithmetic series is

Mathematics
1 answer:
RSB [31]2 years ago
7 0

Answer:

-1557

Step-by-step explanation:

a+14d=143

a+12d=183

--------------------

2d= -40

d= -20

a=183+240=423

a(100th)= 423+99*-20=423-1980= -1557

I hope that help =)

You might be interested in
a certain drug is made from only two ingredients compound a and compound be there are 5 ml of compound a used for every form a c
kaheart [24]

Answer:

109.8

Step-by-step explanation:

549/5 =109.8

6 0
3 years ago
You are buying packages of beads to make bracelets. Each package costs $3 plus 7% tax. You have a gift card for $15, and you pla
julia-pushkina [17]

Answer:

Step-by-step explanation:

The funtion is:

C(p)= 3(p)+1.07 (1)

where: 3 is the package cost, p is the number of packages and 1.07 is the taxes

the cost could be equal or less than the gift card value so:

CC \leq 15 (2)

Replace 2 en 1

15\leq 3(p) x 1.07

3(p)\leq \frac{15}{1.07}

3p [tex]\leq14.02\\\\p\leq \frac{14.02}{3} \\\\p\leq 4.67[/tex]

It´s important to aprox the quantity to the minimum value so I can buy 4 packages

The reasonable domain is for all R because any number is a possible value of the independent variable

6 0
3 years ago
The probability density function of the time it takes a hematology cell counter to complete a test on a blood sample is f(x)=0.0
uysha [10]

Answer:

a) 20%

b) 40%

c) Mean = 62.5 seconds; Variance = 52.083 seconds

Step-by-step explanation:

The time it takes a hematology cell counter to complete a test on a blood sample is continuously distributed over the period of 50 to 75 seconds with probability f(x) = 0.04.

a) The percentage of tests require more than 70 seconds is:

P(X>70) = 1- \frac{70-50}{75-50} \\P(X>70) =0.2 = 20\%

b)The percentage of tests that require less than one minute (60 seconds) is:

P(X70) =0.4 = 40\%

c) The mean and variance of a continuous distribution are determined by:

M=\frac{A+B}{2}=\frac{50+75}{2}\\ M= 62.5\ seconds\\\\V=\frac{(B-A)^2}{12}=\frac{(75-50)^2}{12}\\  V= 52.083\ seconds

Mean = 62.5 seconds.

Variance = 52.083 seconds.

3 0
3 years ago
Please help.....no one would help me so PLZZZZ
Anvisha [2.4K]

Answer:

Step-by-step explanation:

a) r = 10/2 = 5 feet

Area of floor =πr² =3.14*5*5 = 78.5 feet²

B) h = 3 foot

Volume of cylinder = πr²h = 3.14*5*5*3 = 235.5 cubic feet

Volume of hemisphere =2/3πr³= 2*3.14*5*5*5/3=261.67 cubic feet

Volume of space inside the observatory = 497.17 cubic feet

7 0
3 years ago
Find the area of the shaded region of the square to the nearest square inch
sashaice [31]
I need a picture of the problem or something at least
8 0
4 years ago
Other questions:
  • What is the polynomial function of lowest degree with leading coefficient of 1 and roots mc024-1.jpg, –4, and 4? (image is √3)
    13·1 answer
  • Write the equation of the line that passes through the points (3,7) and (-1,2) in point-slope form and slope-intercept form. I a
    15·1 answer
  • Find the length of the diameter of a circle with the circumfance=62.8 cm.
    6·1 answer
  • Show your work in solving each
    15·1 answer
  • Find the value of the expression.<br> 3 - 0 x 11
    12·2 answers
  • In 1993, funding for a program increased by 0.79 billion dollars from the funding in 1992. In 1994, the increase was 0.49 billio
    13·1 answer
  • Cuál es el valor de la siguiente expresión x=-3<br> -3 (5x+4x+1) +2 (x -5)
    9·1 answer
  • The cube root of every integer is an integer. True or false​
    8·1 answer
  • Piper used 1/3yard of ribbon to create a border around a
    11·1 answer
  • Please help i will give extra points:)
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!