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
ArbitrLikvidat [17]
4 years ago
14

What is x? 15(x-1)-7(x+9)=4x

Mathematics
1 answer:
Kitty [74]4 years ago
7 0
I got x = -78.75 , i included a picture of my work because it’s too difficult to put into text!

You might be interested in
(HMMT Combo 2009) Two jokers are added to a 52 card deck and the entire stack of 54 cards is shuffled randomly. What is the expe
myrzilka [38]

The expected number of cards from the card deck that will be strictly between the two jokers is \frac{52}{3} .

<h3>What is card deck?</h3>

The most popular deck of cards used today is a normal 52-card deck of French-suited playing cards. [a] It is the only standard pack[b] used for playing cards in English-speaking nations; but, in many other nations throughout the world, it is used alongside other traditional, frequently older, standard packs with various suit systems, like those with German-, Italian-, Spanish-, or Swiss suits. The English pattern pack is the only one widely accessible in Britain and America and the most popular pattern of French-suited cards globally. The Belgian-Genoese pattern, which was created in France but is also used widely in Spain, Italy, the Ottoman Empire, the Balkans, and much of North Africa and the Middle East, is the second most popular.

Let all pairs of the positions (m,n) of the jokers are equally likely

P[0]=P[|m-n|=1]=\frac{53}{\left(\begin{array}{c}54 \\2\end{array}\right)}=\frac{2}{27}

P[1]=P[|m-n|=2]=\frac{52}{\left(\begin{array}{c}54 \\2\end{array}\right)}=\frac{104}{1431}

P[k]=P|m-n|=k+1=\frac{54-k-1}{\left(\begin{array}{c}54 \\2\end{array}\right)}

the expected value will be

\begin{array}{l}\sum_{k=1}^{52} \frac{54-k-1}{\left(\begin{array}{c}54 \\2\end{array}\right)} k \\=\frac{1}{1431}\left(\sum_{k=1}^{52} 53 k-k^{2}\right) \\=\frac{1}{1431}\left(\frac{53}{2}(52)(53)-\frac{1}{6}(52)(53)(105)\right)\\=\frac{52}{3}\end{array}

Therefore, the expected number of cards that will be strictly between the two jokers is \frac{52}{3} .

To learn more about card deck from the given link:

brainly.com/question/13477028

#SPJ4

5 0
2 years ago
Find the area of a circle with a diameter of 8 in. Rounded to the nearest tenth. Use 3.14 for π.
rodikova [14]

Answer:

50.2 in^2

Step-by-step explanation:

Using the Formula

A=πr2

d=2r

Solving for A

A= 1/4 π d^2 = 1/4*π*8^2 = 50.26548

=50.2in^2

7 0
3 years ago
The tape diagram represents the ratio of the time you spend tutoring to the time your friend spends tutoring. You tutor for 3 ho
Dafna11 [192]

Answer:

By a quick online search, i found two tape diagrams:

13) You: -

     Friend: - -

So you have one block, and your friend has two.

We know that you work for 3 hours, this means that your only block must represent 3 hours.

And all the blocks represent the same amount of time, then each one of the two blocks of your friend also represents 3 hours.

Then in total, he tutored for 3 hours + 3 hours = 6 hours.

14) You: -

     Friend: - - - - -

In this case, you still have only one block, but now your friend has 5.

Using the same reasoning as above, we can conclude that each block represents 3 hours, and your friend has 5 of them, this means that he tutored for:

5*3 hours = 15 hours

4 0
3 years ago
HELP ASAP PLEASE {will gave thanks and a brainliest}
Luba_88 [7]
Alright here I go:

9.98 * 10^6 in standard form is 9,980,000
7.3 * 10^7 in standard form is 73,000,000
73,000,000 subtracted by 9,980,000 is 63020000.
63020000 in scientific notation is 6.302 * 10^7
Hope I helped!
8 0
3 years ago
PLEASE HELP<br> which is the correct triangle congruence statement?
konstantin123 [22]

Answer:

it the 3rd one

Step-by-step explanation:

3 0
4 years ago
Read 2 more answers
Other questions:
  • How to compute the average rate of change of a function on the interval?
    10·1 answer
  • The model below is shaded to represent a fraction <br> which model shows an equivalent fraction
    11·1 answer
  • A machine produces a total of 12,000 bolts a day, which are on the average 3% defective. Find the probability that out of 600 bo
    12·2 answers
  • The variable x represents the number of angelfish Carlos bought and the variable y represents the number of parrotfish he bought
    11·1 answer
  • If the total for this month's credit purchases is $550 at 24% annual interest, what is the total balance for the month after one
    12·1 answer
  • where is sandy mistake ive been trying for 30 mintues and still cant find it im not very good at math please help
    7·1 answer
  • If you answer this correctly you get a cookie
    6·1 answer
  • Can someone please help me with absolute value? It has to eb turned in tonight and I don't understand how to solve.. I would rea
    7·1 answer
  • What is 2 1/3 divided by 2/5
    6·1 answer
  • What is the y-intercept of the line that passes through the points (-11,17) and (17, 6)?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!