Answer:
7 hours
So you so 642-425= 217, then you do 217/31= 7
your answer is 7
What is the solution to -4(8 - 3x) 6x - 8?
Help
Answer:
-40+ 72x
Step-by-step explanation:
-32+12x ×6x-8
-32-8 +12x× 6x
-40 +72x
You're a contestant on a TV gameshow where you must choose between four identical looking suitcases containing $100, $100, $300, and $400. You start by randomly picking one suitcase. The host then opens the remaining suitcase with the lowest dollar amount. Now, you have the choice to keep your current suitcase or switch to one of the two remaining suitcases. With probability p= 0.7, you keep your original suitcase and open it. Otherwise, you are equally likely to choose either of two the remaining suitcases and open it. You win the money in the suitcase you opened.
Consider these events:
Ai is the event that the first suitcase you choose is worth i dollars.
Hi is the event that the host opens a suitcase worth i dollars.
Wi is the event that you win i dollars.
If you play this game five times, the probability that the event W400 occurs twice in five trials is:_______
Answer:
0.2990 = 29.90%.
Step-by-step explanation:
For each trial, there are only two possible outcomes. Either you win $400, or you do not. Trials are independent. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
And p is the probability of X happening.
Probability of winning $400 in a trial:
1/4 probability of choosing the suitcase containing $400, and in this case, 0.7 probability of keeping it.
3/4 probability of choosing another suitcase. Then, 0.3 of 3/4 probability of changing the suitcase, and 0.5 of 0.3 of 3/4 probability of getting the suitcase containing $400. So
[tex]p = \frac{1}{4}*0.7 + \frac{3}{4}*0.3*0.5 = 0.25*0.7 + 0.75*0.15 = 0.2875[/tex]
If you play this game five times, the probability that the event W400 occurs twice in five trials is:_______
This is P(X = 2) when n = 5. So
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = 2) = C_{5,2}.(0.2875)^{2}.(0.7125)^{3} = 0.2990[/tex]
The probability is 0.2990 = 29.90%.
A math question I need help in
Questions
25/(4+1) .
3+(6-1)
Answer:
Step-by-step explanation:
[tex]1) \frac{25}{(4 + 1)}=\frac{25}{5}=5\\\\2) 3 + (6-1) = 3 + 5 = 8[/tex]
Akris has a Quilted Calfskin bag on their website for this season in the shape of a trapezoid. Ms. Johnson called the company to get the dimension to use as a project for her math students. Based on the dimensions below, what is the area of trapezoid shaped purse?
Answer:
parralelagram
Step-by-step explanation:
if susan, janice, and melvin take 2.0 hours to walk to their school at a rate of 1.0 m/s, how far is their school from their house?
please help me huhu
Answer:
7.2 km
Step-by-step explanation:
Given that:
Hours taken = 2 hours
Walk rate = 1 m/s
Distance = Speed * time
Time taken in seconds = 2 * 60 * 60 = 7200 s
Hence,
Distance = 1 m/s * 7200s
Distance = 7200 meters
Distance in km = 7200 / 1000 = 7.2 km
Please help, will give brainliest!
Answer:
Step-by-step explanation:
In parallelogram, diagonals bisect each other
DP = IP
7x - 8 = 3x
7x = 3x + 8
7x - 3x = 8
4x = 8
x = 8/4
x = 2
NP = YP
3y = 7x - 2
3y = 7*2 - 2
3y = 14 - 2
3y = 12
y = 12/3
y = 4
John works two jobs. He earns $10 an hour babysitting his neighbor's children and $15 an hour mowing lawns in his neighborhood. Last week he worked a total of 20 hours and earned a total of $240.
Drag and drop numbers in the boxes to create an equation which models this situation if x = the number of hours he spent babysitting and y = the number of hours he spent mowing lawns last week.
The number of hours he spent babysitting is 12 hours and the number of hours he spent mowing lawns last week is 8 hours.
What is an equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
Given that, John works two jobs. He earns $10 an hour babysitting his neighbour's children and $15 an hour mowing lawns in his neighbourhood. Last week he worked a total of 20 hours and earned a total of $240.
Let the x be the number of hours he spent babysitting and y be the number of hours he spent mowing lawns last week,
Establishing the equation, we get,
x+y = 20
x = 20-y......(i)
10x+15y = 240.......(ii)
Using the equation (i) in (ii), we get
10(20-y)+15y = 240
200-10y+15y = 240
5y = 40
y = 8
Put y = 8 in eq(i)
x = 20-8
x = 12
Hence, the number of hours he spent babysitting is 12 hours and the number of hours he spent mowing lawns last week is 8 hours.
For more references on equations, click;
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6/9×4/7 WHOEVER ANSWERS IN UNDER 2 MINUTS I WILL MARK BRAINLIEST
Answer: 380952381 / 1000000000
Step-by-step explanation:
:)P.s. This simplifies to 8/21 .
Answer:
8/21
Step-by-step explanation:
evaluate (4x-5)² pls send answers
Answer =
= (4x - 5)²
= 16x² - 40x + 25
If you flip two coins 4 times,
What is the best prediction possible for the number of times both coins will land on heads ?
Answer:
1
Step-by-step explanation:
The different possibilities for flipping two coins are:
TT
TH
HT
HH
Only 1/4 is two heads.
Since you're finding the best prediction possible for the number of times both coins will land on heads out of 4 times, that means its 1/4 * 4 = 1 time
Answer:
1/4 is the probablity
Step-by-step explanation:
if you flip 2 coins one time the no.of outcome are 4 if you flip is 4 time no.of outcomes are 16
P(E)= favourable outcomes/ total no.of outcomes
= 4/16
= 1/4
PLS MARK BRAINLIEST, THNX
Mica read 1/6 of a book on Monday and 3/8 on Tuesday. Susan read 5/6 of the same book.
How much more of the book has Susan read than Mica?
A. 14/24
B. 8/24
C. 7/12
D. 7/24
if Rohans weight is t+6 kg and is 7 kg less than Rahul whose weight is 54 kg. What is the value of t
Answer:
T = 41
Step-by-step explanation:
Rohan's weight = t+6
Rahul's Weight = t+6+7 = 54
t = 54 - 6 - 7
t = 41
Select two expressions that are equivalent to 2+b+b
Answer:
3x + 5 ( -4x + 12 ) - ( x - 3 )
A. -18x + 63
B. 18x - 63
C. 3x - 20x + 60 - x + 3
D. 3x + 20x + 60 - x - 3
Answer:
a and b is the answer hope this
Step-by-step explanation:
.
helps
PLEASE HELP I WILL MARK BRAINLEST IMMEDIATELY!!!
Tyra made 8 fewer
jackets than Zack.
They made 48 jackets
altogether. How many
jackets did Zack make?
Answer:
28
Step-by-step explanation:
40-8= 40 divided by 2 = 20 so zack made 28 jackets
4. What is the circumference of a circle with a radius of 4 cm?
Answer:
25.13
Step-by-step explanation:
2 π r
2 x π x 4 =25.13
A tailor used 6 2/3 yards of fabric to make hats. The amount of fabric needed to make each hat is 5/6 yard. How many complete hats did the tailor make?
Answer: The tailor made 8 complete hats
Step-by-step explanation:
Amount of fabrics available to make hat = 6 2/3 yards
1 hat requires = 5/6 yards
Number of hat to obtain from the available fabric = Amount of fabrics available to make hat / requirement of 1 hat
=(6 2/3) / (5/6)
(20/3) / (5/6)
20/3 x 6/5 = cancelling out, we are left with
4x2= 8 hats
or
(20/3) / (5/6)
6.6666 /0.83333
= 8.00002= 8 hats
Linda has a watering can with a capity of 3 liters. Each day, her plants need 6,000 milliliters of water. How many times does Linda have to fill her watering can to water all of her plants daily?
Answer:
2 times each day
1 liter is 1000 milliliters
the watering can has a capacity of 3 liters which is 3000 milliliters
her plants need 6,000 milliliters of water each day which means that she will need to fill her watering can twice a day.
What is y=- x +3 in standard form using integers?
Answer:
x+y = 3
Step-by-step explanation:
Brandy needs 1/4 tsp of
vanilla extract to make
2 dozen cookies. How
many teaspoons will
she need o make 5/2
dozen cookies?
Answer:
2/4 + 1/8................
Does anyone know the answer to this ?
Answer:
2.5mph
Step-by-step explanation:
S = Distance divided by Time (S = D/T)
Therefore.
S = 15/6
=2.5 mph
Colin walked an average speed of 2.5mph
Answer:
the answer is 2.5 mph
Step-by-step explanation:
speed= distance/time
speed=15/6
15 divided by 6 = 2.5
Write the equation of a line parallel to the line 2x=3y
the image is your graph
Honestly don’t understand how to do this so anyone know the answer?
Answer:
Your answer will be "B" Trust me
Answer:
Number 2
Step-by-step explanation:
If you substitute -1 to the x in the second equation you'll get 3+15=18
18=18
Miguel is posting photos on a school website. He has 48 photos, and he is allowed to use 12 pages. He wants to put the same number of photos, p, on each page.
1.) 48p = 12
2.) 12 + p = 48
3.) 12p = 48
4.) 48 = p - 12
Answer:
The answer is 3.)
Step-by-step explanation:
Answer:
3. 12p = 48
Step-by-step explanation:
Start with 12p = 48
Your goal is to find the number of photos, p, that can go on each page. To do this, you need to isolate p (in other words, get p by itself)
Divide both sides by 12 and you end up with:
p = 4
Express the interval shown on the number line in interval notation.
Answer:
[-7, infinity)
Step-by-step explanation:
solid dot on -7 so [
arrow is to positive infinity
infinity always use )
Please help ASAP!!! And explain how you did it too :,)
The diameter of a round rug is 42 inches. What is the approximate area of the rug?
A. 5,539 square inches
B. 10 square inches
C. 38 square inches
D. 1,385 square inches
Answer:
D, It would be 1,385 Square Inches
Step-by-step explanation:
What is the rate of return when 30 shares of Stock
A, purchased for $15/share, are sold for $480? The
commission on the sale is $6.
Rate of Return = [?] %
Give your answer as a percent rounded to the
nearest tenth
Answer:
5.1%
Step-by-step explanation:
We are told that 30 shares of Stock are purchased for $15/share..
This gives a total value of: 30 × 15 = $450.
Now,they are sold for $480 with a commission of $6. This means the final money getting to the seller is; 480 - 6 = $474.
Thus; rate of return percentage = (474 - 450)/474) × 100% = 5.06%
To the nearest tenth gives; 5.1%
The rate of return is 5.1%.
Given that,
A, purchased for $15/share, are sold for $480.The commission on the sale is $6.Based on the above information, the calculation is as follows:
The total value should be
[tex]= 30 \times 15[/tex]
= $450.
Since it is sold for $480 along with commission of $6 so final money should be
= 480 - 6
= $474.
Now rate of return is
[tex]= ((474 - 450)\div 474) \times 100%[/tex]
= 5.06%
= 5.1%
Learn more: brainly.com/question/17429689
Grandma has 4 bags of soil for her flower pots each flower pot needs 3/4 of a bag of soil how many flower pots can she fill
Answer:
5
Step-by-step explanation:
3/4 3/4 3/4 3/4= 4 + 1/4 + 1/4 + 1/4 + 1/4 = 1 = 5 1/4
Since you need 3/4 to fill a pot the answer is 5. WIth 1/4 left over
Brainliest please
Answer:
5 [tex]\frac{1}{3}[/tex]
Step-by-step explanation:
Total no: of bags = 4
A mount each pot needs = 3/4
No: of pots it can fill = 4 ÷ 3/4 = 4 x 4/ 3 = 16/ 3 = 5 [tex]\frac{1}{3}[/tex]
Is it right?
What is -6k + 7k simplified?
Answer:
1k
Step-by-step explanation:
-6k+7k=1k
or
7k-6k=1k
Answer:
The answer would be found by adding -6 and 7 k so itd be 1k or just k
