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
Deffense [45]
2 years ago
9

Pleaseeeee helpppppppppppppp

Mathematics
1 answer:
Ulleksa [173]2 years ago
5 0

A math class has 3 girls and 7 boys in the seventh grade and 3 girls and 3 boys in the eight grade. The teacher randomly selects a seventh grader and an eight grader from her class for a competition. What is the probability that the students she selects are both boys?

Answer: 3/5

You might be interested in
Emanuel has 745 pictures in his phone.His memory is getting full, so he starts deleting 20 pictures every day. Define each varia
BigorU [14]
Let f be the function with variable n, which gives the number of pictures left in the phone after deleting pictures for n-days.

So f(1) gives the number of photos left after 1 day of deleting photos

     f(2) gives the number of photos left after 2 days of deleting photos

     and so on.

f(1)=745-20
f(2)=745-20-20=745-20*2
f(3)=745-20-20-20=745-20*3

so clearly f(n)=745-20n

Answer:

the algebraic expression is f(n)=745-20n, 

where n is the n'th day of deleting photos, and f is the number of photos left after n days of deleting.
7 0
3 years ago
Write three consecutive numbers starting with number n+1, where n is natural number. Find the sum of those numbers and prove tha
netineya [11]

Consecutive numbers differ by one, which means that if you start with a certain integer x, you obtain the next integer by adding one.

So, if you start with n+1, the three consecutive numbers are

n+1,\quad (n+1)+1 = n+2,\quad (n+2)+1 = n+3

The sum of these three numbers is

(n+1) + (n+2) + (n+3) = 3n+6

This number is divisible by 3 because you can write it as

3n+6 = 3(n+2)

Note that this is true in general: the sum of three consecutive numbers is always divisible by three, because it is three times the middle number.

5 0
2 years ago
Please help me! This is due tomorrow and I really need some help! Thank you.
Harlamova29_29 [7]

Answer:

B. the mean is 59 inches

Step-by-step explanation:

if you add the number of inches together you get 413. 413 divided by 7 is 59. that is the mean.

4 0
3 years ago
Read 2 more answers
What is the value of the discriminant for the quadratic equation 0=2x^2+x-3
xenn [34]
You use the equation Ax^2 + Bx + C to solve this equation.

The answer is 25.

I hope this helps :D
4 0
3 years ago
Can somebody please help I’ll give Brainliest answer❤️
alisha [4.7K]

Answer:

I believe the answer is 4 inches long

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • What is the measure of angle 1
    5·2 answers
  • If Madison, makes $9.50/hour and works 40 hours/week. How much does she make per<br> week?
    9·2 answers
  • If John's car gets an average of 18 mpg and he fills his tank with 26.7 gallons of gas, how far can John travel on a tank of gas
    6·2 answers
  • Simplify the complex fraction. Please show all work!
    10·1 answer
  • Appples are on sale for 1.99 a pound sheila buys p pounds of apples for a total cost of c dollars
    7·2 answers
  • Which statement best describes the interquartile range of this set of weights?
    14·1 answer
  • A water tank has 800 liters of water and is going to be drained at a rate of 15 liters per minute.
    12·1 answer
  • HELP ME PLSSS <br> I kinda know what to do but at the same time, I'm so lost right now. help
    8·1 answer
  • 7 1/8 × 5 2/3<br><br>O 35 1/12 <br>O 40 3/8<br>O 35 3/8​
    15·1 answer
  • Which word describes a change or event that has happened because of another change or event?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!