Answer:
a
Step-by-step explanation:
At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party?
There would be 12 people at the party!
In general, with n+1 people, the number of handshakes is the sum of the first n consecutive numbers: 1+2+3+ ... + n.
Since this sum is n(n+1)/2, we need to solve the equation n(n+1)/2 = 66.
This is the quadratic equation n2+ n -132 = 0. Solving for n, we obtain 11 as the answer and deduce that there were 12 people at the party.
Since 66 is a relatively small number, you can also solve this problem with a hand calculator. Add 1 + 2 = + 3 = +... etc. until the total is 66. The last number that you entered (11) is n.
Hope this helps!
Answer:
Uhm. You didnt get this from me, But If there was 66 handshakes, and each person shakes another persons hand, all you gotta do is divide it by 2 and you get 66.
Step-by-step explanation:
Im right ik ty ;)
PLEASE HELP ME I'LL MARK BRAINLIST
Solve the following system of equations. SHOWING ALL STEPS.
5x-4y=-2
2x+4y=16
*************************************
Use the \sqrt{x} button to show your math and steps. Also, a table might help you organize your work.
Answer:
(2,3)
Step-by-step explanation:
Pls help it is due today
Answer: x=50
Step-by-step explanation:
18*x-(900)=0
Pull out like factors: 18x-900=18x(x-50)
18=0
x-50=0
Add 50 to both sides of the equation:
x=50
50 is the answer i think i hope
Plz help. Giving out brainlist.
You can complete three-tenths of a task in an hour. Your friend can complete one-fifth of the same task in an hour. How long will it take to complete the task if you work together? Explain.
_______ hours.
Answer:
i think its 2 hours
Answer:
u can finish in 2 hours
Step-by-step explanation
what is the answer pls give me the answer pls with explanations
i just need helppppp
Answer:
ez xD
Step-by-step explanation:
Answer:
1. 2x
2. 4x
3. 8
4. 16
5. 4
If n=6 what is the value of n^2
Answer:
36
Step-by-step explanation:
if n=6 and the equation is n^2
then you would times 6x6
which equals 36
Hope this helped!
Order these numbers by least to greatest
3.2, 2.1281, 3.208, 3.28
Answer:
Your answer
2.1281<3.2<3.208<3.28
Mark it as Brainlist. Follow me for more answer.
Step-by-step explanation:
Which of the following describes the function shown in the table below?
Answer:
B i took the test 100%
Step-by-step explanation:
100 people are asked their favorite color. 29 people say that blue is their favorite color.
What percentage of the group chose blue?
2 numbers that when added equals 36 but when multiplied equals -12
Answer:
-6 and -6
Step-by-step explanation:
-6+(-6)=-12
-6x-6=36
Answer:-6 and -6
Step-by-step explanation:
Enter an equation below that describes the hanger.
Answer:
10+z= 4z
Step-by-step explanation:
The hanger is perfectly balanced meaning that both sides are the same. Since you want an equation that means there is going to be and equals sign indicating both sides are the same.
On one side there is 10 and a z dangling that means on the left 10+z will be the first part of your equation
On the other side, the right, there are four z's dangling at the same weight as the first side.
Z is unknown but can be solved for. The equation is the answer but if there is a follow up question asking to solve for z you would get
Z= 3 1/3
Don deposited $3,500 for 5 years on 2.40% P. A. interest rate in his savings account. How much simple interest will he earn?
Step-by-step explanation:
S.I=P×R×T
P=$3500
R=2.40%
T=5
S.I=3500×5×2.40
___________
100
S.I= $420
Grade 8 math - 15 points :)
Hopefully someone can draw the plot
Answer:
we can't
Step-by-step explanation:
Pick the correct symbol. write the equation with the variable.
Answer:
j=2j+17
Step-by-step explanation:
this shows that joes's score is equal to 2 times his original score +17
Answer:
j^2+17
Step-by-step explanation:
(BRIANLEIST) HELP
True or False
Answer:
True
Step-by-step explanation:
What is the difference between the median and the range in the data set shown below?
A. 5
B. 4.75
C. 1
D. 0.25
The difference between the median and the range in the data set shown below is option A. 5.
The calculation is as follows:Median is 7
As two numbers in the middle should be 8 and 6.
Now
= 8+ 6
= 14
It should be divided by 2 so it comes 7.
The range should be
= 13- 1
= 12
Now the difference is
= 12-7
= 5
Learn more: brainly.com/question/16911495
Answer:
dont thank me thank him
:)A
Step-by-step explanation:
Please help me answer this question!
Answer:
Short answer 18 x 6 = 108
Step-by-step explanation:
Hope this helps and the perimeter is __18___
Hope this helps! Make me brainllest please!!
There are 5,280 feet in a mile. If a cloud is 5.3 miles above the
ground, about how many feet above the ground is it?
Answer:
996.2
Explanation:
There are 5,280 feet in a mile. If a cloud is 5.3 miles above the
ground, so you divide 5,280 by 5.3, so it is about 996.2.
EASY 13 POINTS RIGHT HERE
10.31 as a mixed number
Answer:
Step-by-step explanation:
PLEASE HELP ASAP I WILL MARK BRAINLIEST!
Is 2/6 and 18/54 proportional?
Is 9/10 and 18/30 proportional?
Answer:
no and no
Step-by-step explanation:
if something is proportional, it needs to be a straight line, and pass through the origin. as these lines are straight, they do not pass through the origin.
"If you share 7 apples equally with 3 people, then there are 2 1/3..."
First, complete the sentence. Then, briefly explain what the whole number 2, the denominator 3, and the numerator 1 mean in this problem.
3 Three triangular pendants are shown. Which pair of
pendants are similar? Explain how you know.
please help its constant of proportionality I WILL MARK BRAINLIEST
also if u dont get it or need a friend jus lemme know UwU <3
Answer:
The first on is 5 dollars per chore
Step-by-step explanation:
for every chore you get 5 dollars you can see because the first set is 3 chores you get 15 dollars and 3 divides by 15 equals 5
Answer: 5 dollars per chore
Humberto evaluates the expression 4 t 2 for t = 3 . He correctly substitutes 3 for t in the expression, but then says that the value is 144. However, he is incorrect!
What is the correct value of the expression?
In which equation would you multiply both sides by 4.5 to get the variable alone?
A. 6.1p = 4.5
B. p ÷ 6.1 = 4.5
C. p ÷ 4.5 = 6.1
D. 4.5p = 6.1
Answer:
c.
Step-by-step explanation:
p/4.5 = 6.1
to isolate the variable do the opposite action
p/4.5 = 6.1
as p is divided by 4.5, you must multiply both sides by 4.5
p/4.5 ×4.5 = 6.1 × 4.5
p = 27.45
Simplify) 2.34x +15 − 1.23x − 12
Answer:
1.11x +3
Explanation:
Simplification is the process of replacing a mathematical expression by an equivalent one, that is simpler (usually shorter), for example. Simplification of a fraction to an irreducible fraction. Simplification of expressions, in computer algebra.
How would you write out "The quotient of a number decreased by 7 and -2 is -10"
Answer:
40
Step-by-step explanation:
The quotient of a number and six 7. n. + 4. Seven divided by a number, plus four. A number decreased by forty.
(2 to the power of -6) divided by 13
Answer:
1/832
Step-by-step explanation:
Ok. this is a huge life or death for me. ;-; (Not really.)
Answer:
y = 2, 3, 4
Step-by-step explanation:
y = 2, 3, 4
Hope it helps you in your learning process.
[tex] y= \frac{1}{4} x + 1[/tex]
When x = 4
[tex] y= \frac{1}{4} \times 4+ 1[/tex]
[tex] y= 1+ 1=2[/tex]
When x = 8
[tex] y= \frac{1}{4} \times 8+ 1[/tex]
[tex] y= 2+ 1=3[/tex]
When x = 12
[tex] y= \frac{1}{4} \times 12+ 1[/tex]
[tex] y= 3+ 1=4[/tex]