Answer:
A. 12+(-9)
Step-by-step explanation:
8 + (4 -9) = 3
12 + (-9) = 3
-12 + 9 = -3
-4 +(-9) = -13
4 + (-9) = -5
The probability of two events A and B happening simultaneously is 0.17. The probability of only event A happening is 0.34. Find the probability of event B happening, if event A has already happened
Answer:
because is the probability is 0.17 and 0.34 is fair
You can use the multiplication rule of probability.
The probability of event B happening if event A has already happened is 0.5
What does general multiplication rule of probability says for 2 events A and B?[tex]P( A \: \rm and \: B) = P(A)P(B|A) = P(B)P(A|B)[/tex]
Since we've to find the probability of B given that A has already happened, we need [tex]P(B|A)[/tex]
Since the probability of both event A and event B happening simultaneously is 0.17, thus:
[tex]P(A \: \rm and \: B) = 0.17\\
[/tex]
Since the probability of only event A happening is 0.34, thus:
[tex]P(A) = 0.34[/tex]
Thus, from the multiplication rule, we have:
[tex]P(A \: \rm and \: B) = P(A)P(B|A)\\
0.17 = 0.34 \times P(B|A)\\\\
\dfrac{0.17}{0.34} = P(B|A)\\\\
P(B|A) = \dfrac{1}{2} = 0.5[/tex]
Thus, we have the probability of event B happening when A has already happened as 0.5
Learn more about multiplication rule of probability here:
https://brainly.com/question/14450597
A system is described by the equations2x + 3y = 10 4x + By = 20 For what value of B will the system have infinitely many solutions?
The length of the diagonal of a squere is 36 feet. Find the length of the side of the square.
I need help with this pls
Step-by-step explanation:
by PT,
36^2 = length^2 x length^2
length = 6 feet
Topic: Pythagoras theorem
If you like to venture further, do check out my insta (learntionary) where I regularly post useful math tips! Thank you!
when dividing 592 by 9.25, how many zeros will be placed in the dividend?
A: one
B: two
C: three
D: four
Iwefwegweg weg ewgwewegw egwe gwe gwe weg weg w
Answer:
gweew gshbx
Step-by-step explanation:
Natalia solved the problem
74
.
4
÷
12
=
6
.
2
. Complete the model with partial products to check Natalia's work using multiplication.
A large rectangle is broken into 4 smaller rectangles The top line is labeled 6 and 0.2. The left side is labeled 10 and 2. The rectangles are divided between those labels. The top left rectangle is labeled A. The top right rectangle is labeled B. The bottom left rectangle is labeled C. The bottom right rectangle is labeled D.
Part A
Drag values to the boxes to complete the partial products. Not all choices will be used.
0.4 1.2 2 4 6 12 20 60
The product for A =
.
The product for B =
.
The product for C =
.
The product for D =
.
Part B
Choose the words to complete the statement.
Natalia's work is
correct
, because the total of the partial products is
Choose...
as the dividend.
Answer:
The product for A = 60
The product for B = 2
The product for C = 12
The product for D=0.4
Choose......correct, Choose.....the same
Step-by-step explanation:
I had the same question on a test and this is the correct answers. Hope this helped!
A bin at a department store contains blue and red blankets. The ratio of blue blankets to red blankets is 13 to 7. What percent of the blankets in the bin are blue?
Step-by-step explanation:
13=blue blankets 7=red blankets
First, we need to know how many blankets there are in total.
13+7=20
Now, we don't need the seven anymore. Our ratio is blue blankets to total blankets.
13/20
Now, we need to know how many blue blankets there are in percentage.
13/20 = x/100
Next step: 13 times 100 is divided by 20
x= 13(100)÷20
x=1300÷20
x= 65
Therefore there are 65% of blue blankets.
Evaluate 8x when x = 3.12
Answer:
24.96
Step-by-step explanation:
When you do 8 times 3.12, because 8x (8 times x), you would get 24.96.
Use distributive property to complete the equivalent expression. Enter your answer in the boxes. 4(y - 3) =
Help i am stuck please be fast
Answer:
Step-by-step explanation:
They are alike because both involve steps for multiplication and addition but part b uses factoring in its estimation to solve the problem while part c dosesn't.
Danielle earns $36.80 for 4 hours of yardwork. MacKenzie earns $50.40 for 6 hours of yardwork.
Who earns more money per hour? How much more? Use the drop-down menus to show your answer.
Choose...
earns
Choose...
more per hour.
Answer:It is Danielle i guess cause she earns 9.2 each hour and MacKenzie gets 8.4 an hour
:)
Organic milk costs $2.52 per half gallon. At this rate, how can the price of 4 gallons of organic milk be determined?
by multiplying $2.52 by 4
by dividing $2.52 by 4
by finding the unit price and multiplying it by 4
by finding the unit price and dividing it by 4
Answer:
Step-by-step explanation:
by finding unit price and multiply
u wouldn't timea by 4
A local park is in the shape of a square. A map of the park is made with the scale of 1 inch to 200 feet. If one side of the park on the map is one foot long, how long is the side of the park in real life?
I NEED HELP! I WILL MARK YOU AS BRAINLIEST IF YOU ANSWER CORRECTLY! :D
Answer:
1. Train B is faster
Step-by-step explanation:
Train b travels a greater distance in 2 hours than train A.
Train B travels 250 miles in 2 hours, while Train A travels only 120 miles.
Please help does anyone know the answer?
Answer:
.75 i think
Step-by-step explanation:
I need help desperately
Answer:
B is the answer
Step-by-step explanation:
Look at where the decimal is placed and the value of the numbers
Yolanda writes a 1,500 word essay about the American Revolutionary War.
She writes an average of 350 words each day. How many days did she work
on her essay?
4. In the equation y = 8x , what is your constant?
A)y
B)8
C)x
D)0
Answer: it should be 8
Please helppp
solve for y
Answer: [tex]y=\frac{-x}{w-3}[/tex]
Step-by-step explanation:
To solve for y, we want to isolate y.
[tex]w=\frac{3y-x}{y}[/tex] [multiply both sides by y]
[tex]yw=3y-x[/tex] [subtract both sides by 3y]
[tex]yw-3y=-x[/tex] [factor out y]
[tex]y(w-3)=-x[/tex] [divide both sides by (w-3)]
[tex]y=\frac{-x}{w-3}[/tex]
Now, we know that [tex]y=\frac{-x}{w-3}[/tex].
Pls answer and show work!
Answer:
x represents +50 for every hour. the inequality is y = 4x + 500 or y = x + 500.
they can ride it for 4 hours
Step-by-step explanation:
y(total cost) = x(50 per hour) + 500(y-intercept)
i need help with this ^
Answer:
I think it's 3
Step-by-step explanation:
If 2 is c than subtract it and it's 3?
A penny is thrown from the top of a 26.6-meter building and hits the ground 3.59 seconds after it was thrown. The penny reached its maximum height above the ground 0.77 seconds after it was thrown.
1. Define a quadratic function, h, that expresses the height of the penny above the ground (measured in meters) as a function of the number of seconds elapsed since the penny was thrown, t.
2.What is the maximum height of the penny above the ground?
Answer:
it is at 200 mph
Step-by-step explanation:
bc i did the test
The quadratic function which models the motion of the penny is h(t) = -4.9t² + 10.18t + 26.6 and the maximum height reached is 31.53 meters
The relationship can be expressed in the form :
h(t) = - 0.5gt² + vt + h (downward motion)
g = 9.8 m/s²
h = 26.6 m
v = ?
We can obtain v thus ;
h(t) = -0.5gt² + vt + 26.6
h(t) = - 4.9t² + vt + 26.6
Time when penny hits the ground ; t = 3.59
h(3.59) = 0
0 = -4.9(3.59)² + v(3.59) + 26.6
− 63.15169 + 3.59v + 26.6 = 0
3.59v = 36.55169
v = 36.55169 /3.59
v = 10.181 m/s
Equation becomes :
h(t) = -4.9t² + 10.18t + 26.6
2.) The maximum height of the penny above the ground ;
t = 0.77 secondsh(0.77) = -4.9(0.77^2)+ 10.18(0.77) + 26.6
Maximum height reached = 31.53 meters
Therefore, the maximum height reached is 31.53 meters
Learn more :https://brainly.com/question/8882508
Find the missing length indicated.
?
12
4
9
28
50
12.
Answer:
28 probably sorry if wrong
What is the area of the triangle?
6
18
units
Answer:
54 units
Step-by-step explanation:
multiply 6 x 18 = 108 and divide by 2 to get 54. The equation for the area of a triangle is base x height divided by 2.
Answer:
A= 1/2 x 6 x 18 = 54 is that right..
PLEASE HELP!!! Rachel plays a game rolling 2 number cubes numbered 1-6. To win the game she must roll an 11. What is the probability that Rachel will win the game?
Express your answer as a fraction and a percent
Answer:
The probability that Rachel will win the game p(E) = 1/18 =0.055
Step-by-step explanation:
There are 3.9 milligrams of calcium in a ½ ounce of cooked chicken. How many milligrams are in 6 ounces?
Answer:
there are 46.80 milligrams in 6 ounces.
Step-by-step explanation:
In a two-digit number, the units digit is 5 more that the tenth digit. The number itself is three times the sum of its digits. What is this number?
Answer:
15
Step-by-step explanation:
1+5=6
6*3=15
Answer:
27
Step-by-step explanation:
PLZ HELP AND PLEASE HURRY 10 POINTS AND BRAINLIST IF RIGHT!!!
Stem question, can you plz tell me 3 types of natural water vapor other that steam, fog, and clouds, thanks.
Answer:
Smoke, Condensation, mist
Step-by-step explanation:
<3
A+3/4=7/8. Please help solve equation using subtraction