??? What do you mean???
A bag contains 20 marbles - 10 blue and 10 red. What is the probability of selecting 2 blue marbles at random with replacement? *
Answer:
I dot know how you want the answer but the are all correct 2/20 or 10% or 0.10
Step-by-step explanation:
HELP plesse with 9 and 10
Answer:
Find the solutions below
Step-by-step explanation:
Given the equation
y = -x^2 + 2x + 7
y = -2x+2
Equating both expressions
-x^2 + 2x + 7 = -2x + 2
-x^2 + 2x + 7 + 2x - 2 = 0
-x^2 + 4x + 5 = 0
Multiply through by -1
x^2 - 4x - 5 = 0
Factorize
x^2 - 5x + x - 5 = 0
x(x-5)+1(x-5) = 0
(x+1)(x-5) = 0
x+1 = 0 and x - 5 = 0
x = -1 and 5
when x = -1
y = -2x+2
y = -2(-1)+2
y = 2+2
y = 4
when x = 5
y = -2(5)+2
y = -10+2
y = -8
Hence the solutions are (-1, 4) and (5, -8)
b) y = x^2-3x-27
y = x - 6
Equating both expressions
x^2-3x-27 = x - 6
x^2-3x-27 - x + 6 = 0
x^2-4x-21 = 0
x^2 - 7x + 3x - 21 = 0
x(x-7)+3(x-7) = 0
(x+3)(x-7) = 0
x = -3 and 7
when x = -3
y = -3-6
y = -9
when x = 7
y = 7 - 6
y = 1
Hence the required solutions are (-3, -9) and (7, 1)
What is y-1 =2/3(x+3) in slope intercept form?
Answer:
The slope is just 2/3 and the y intercept is (0,3)
What are the x-coordinates of the solutions to this system of equations?
x2 + y² = 36
y = x - 6 (1 point)
Select one:
a. 2 and 0
b. 6 and 2
c. 6 and -2
d. 6 and 0
HELP ASAP!!!! Giving brainliest to whoever answers first!! No links please. :))
Answer:
45 points
Step-by-step explanation:
Average= sun of all numbers/ no. of numbers
33= (23+35+27+48+18+35+x)/7
33= 186+x/7
33×7= 186+ x
231= 186+x
x= 231- 186
x= 45
Answer:
45 points, he scored 45 points in game 7
Step-by-step explanation:
Right now, the average, or mean, is (23 + 35 + 27 + 48 + 18 + 35)/6 = 31
The number plus 23 + 35 + 27 + 48 + 18 + 35 and then divided by 7 should equal 35, that number is 45
(23 + 35 + 27 + 48 + 18 + 35 + 45)/7 = 33 = 231/7 = 33 = 33 = 33
To find the mean, you add all the numbers and then divide it by the amount of numbers there.
seven multiplied to the sum of twelve and four
Answer:
I think answer is the 112
please help will mark brainliest
Answer: the answer is 29.3
Step-by-step explanation:
Can someone please help me with math.
I think its answer B) B
A pair of dice is rolled and the numbers showing are observed. Find the probability that the two dice show different numbers.
Answer:
1/36
Step-by-step explanation:
SOLVE FOR THE BASE
1. 10% of ________-8
2.28 is 4% of _________
3.25% of ________
4.13% of______
5.15 is 12.5% of _____
Answer:
1- 10% of -80 is -8.
2- 28 is 4% of 700.
3- 25% of a number is equal to 1/4 or 0.25 of it.
4- 13% of a number is equal to 0.13 of it.
5- 15 is 12.5% of 120.
Step-by-step explanation:
1. 10% of ________- 8
2.28 is 4% of _________
3.25% of ________
4.13% of______
5.15 is 12.5% of _____
To determine the missing numbers in the statements, the following calculations must be performed:
1-
10 = -8
100 = X
100 x -8 / 10 = X
-800 / 10 = X
-80 = X
Therefore, 10% of -80 is -8.
two-
4 = 28
100 = X
100 x 28/4 = X
2800/4 = X
700 = X
Therefore, 28 is 4% of 700.
3-
25% of a number is equal to 1/4 or 0.25 of it.
4-
13% of a number is equal to 0.13 of it.
5-
12.5 = 15
100 = X
100 x 15 / 12.5 = X
1500 / 12.5 = X
120 = X
Therefore, 15 is 12.5% of 120.
4. A taxi ride costs $9.25. The driver charges a flat rate of
$2.25 just to enter the car. If each mile costs.50, how
many miles did you ride?
Answer: 14
Step-by-step explanation:
9.25-2.25 = 7/.5= 14
Pls help with this I have limited time
Answer:
x = 8
z = 86
Step-by-step explanation:
6x + 46 = 13x - 10 (Because they're vertical angles)
6x - 13x = -10 - 46
-7x = -56
x = 8
6x + 46
6(8) + 46
94
z + 94 = 180
z = 86
what is the Circumference of
r = 126 cm
C =?
Answer:
C≈791.68
Step-by-step explanation:
C=2πr=2·π·126≈791.68135
Which expression is equivalent to sin (1) cos(17) - cos (1) sin(15.)?
Answer:
os 36°: The cosine of 36 degrees can be calculated by using a pentagon. ... sin 18° and sin 72°: Taking the equivalent sine and cosine values of 15° and 18° on ... I angle (the "I" in this expression stands for th
Step-by-step explanation:
in a box of chocolates, 1/5 of the chocolates contain nuts.
the rest of chocolates do not contain nuts.
write down the ratio of the number of chocolates that contain nuts to the number of chocolates that do not contain nuts.
give your answer in the form 1:n
Answer:
1:4
Step-by-step explanation:
chocolates that contain nuts = 1/5
chocolates hat do not have nuts = 4/5
ratio = 1:4
I hope im rght! i
:)
Help please, thank you :)
Answer:
Equation B, 10 + 5.50n = y.
Step-by-step explanation:
N is the pounds of shrimp that were purchased. This has no set value, it can change at any time.
Since each pound of shrimp is $5.50, if you wanted to buy 10 pounds of fish you'd pay $55.
If I wanted to write an equation to find the total amount of money that I'd need to pay for n pounds of shrimp, I would use the equation 5.50n. (I don't know if this makes sense lol I'm terrible at explaining ;-;)
Now, it states that he wants an extra 10 dollars to pay for expenses. On top of the 5.50n, he wants an extra $10.
You need to add 10 to 5.50, in order to get the total amount, or y.
The final equation is going to be 5.50n + 10 = y, or choice B.
the perimeter is ___ units
A wedding cake is made of three circular tiers, as shown below. The cake decorator is going to put one ring of frosting around the circumference of each tier. How many inches of frosting will the cake decorator need? Use 3.14 for pi and round to the nearest whole inch.
Please hurry!
I need both parts by tonight!
Answer:
okokookokokokjfdgugv
What is the End Behavior of the following Graph?
Answer:
b hopefully this helps you with work
Which of the following characteristics does not describe a stock?
O A. No guarantee you will get your money back
B. No maturity date
C. Money can be earned from capital gains
O D. No certificate of ownership
Answer:
D. No certificate of ownership
140 apples increased by 45%
Answer:
The answer is 196 apples
Step-by-step explanation:
my number is a multiple of 6 what 3 other numbers must be a multiple of
Answer:
6 12 36
Step-by-step explanation:
im not sure -_- ....
Answer:
1,2,3
Step-by-step explanation:
Take the prime factorization of 6, that will be 1,2,3. Those will be the answers for any multiple of 6. Example:18-->multiple of 1,2,3,6,9,18.
2x + x + 24=180 ????
3x + 24 = 180
3x = 180 - 24
3x = 156x = 156/3
x=52
13- (-9)
explain how you got this answer
16+ only please answer this
Answer:
22
Step-by-step explanation:
double negative is a plus sign
13--9=22
Answer: 22
Step-by-step explanation:
Here, we need to know the concept of changing signs. Under any circumstances, if there is a "-" sign outside of parenthesis, the signs inside need to be the opposite. If you are still not very clear, I can provide some examples below:
1-(+1) ⇒ there is a "-" sign, so we need to convert the sign inside "+" to "-" ⇒ 1-1 ⇒ 02-(-1) ⇒ there is a "-" sign, so we need to convert the sign inside "-" to "+" ⇒ 2+1 ⇒ 3-------------------------------------------------------
Given
13 - (-9)
⇒There is a "-" sign outside
⇒We need to convert the sign inside "-" to "+"
⇒13+9
⇒22
Hope this helps!! :)
Please let me know if you have any questions
Given: Circle A externally tangent to Circle B. How many possible common tangents to circles A and B can exist? 2 3 4
Answer:
3
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
Describe and correct the error in writing an equation of the line with a slope of 2 and a y-intercept of 7.
Please don't put any links or I will report you.
Answer:
The mistake they made was they switched the slope and y-intercept.
The correct answer is y=2x+7 because when we write an equation in slope intercept form (y=mx+b) you replace m with the slope and b with the y-intercept.
Hope this helps! <3
the x and y axis are tangent to a circle with radius 3 units. write a standard equation of the circle.
Given:
The x and y axis are tangent to a circle with radius 3 units.
To find:
The standard form of the circle.
Solution:
It is given that the radius of the circle is 3 units and x and y axis are tangent to the circle.
We know that the radius of the circle are perpendicular to the tangent at the point of tangency.
It means center of the circle is 3 units from the y-axis and 3 units from the x-axis. So, the center of the circle is (3,3).
The standard form of a circle is:
[tex](x-h)^2+(y-k)^2=r^2[/tex]
Where, (h,k) is the center of the circle and r is the radius of the circle.
Putting [tex]h=3,k=3,r=3[/tex], we get
[tex](x-3)^2+(y-3)^2=3^2[/tex]
[tex](x-3)^2+(y-3)^2=9[/tex]
Therefore, the standard form of the given circle is [tex](x-3)^2+(y-3)^2=9[/tex].
Number 12 please help 10 points no links pleAse
Answer:
C
Step-by-step explanation:
50
52
53
56
We have the 5 at the stem, so we need 0, 2, 3, and 6 at the leaf.
Surgery Satisfaction Survey
Surgery Satisfied Dissatisfied Total
Knee 70 25 95
Hip 90
15 105
Total 160 40 200
The table shows survey results for 200 patients who had either hip or knee surgery. If one person is selected randomly, what is the
probability he or she was dissatisfied, given that he or she had hip surgery? (Round to the nearest tenth of a percent.)
A)
44.2%
B)
38.6%
0
21.7%
D)
14.3%
Answer: D) 14.3%
Step-by-step explanation:
Conditional probability formula:
[tex]P(B |\text{given that A}) =\dfrac{P(A\ and\ B)}{P(A)}[/tex]
So, The probability he or she was dissatisfied, given that he or she had hip surgery = [tex]\dfrac{\text{Number of persons are dissatisfied and has hip surgery}}{\text{Total persons have hip surgery}}[/tex]
From the table, the number of persons who are dissatisfied and has hip surgery = 15
Total persons have hip surgery = 105
Required probability = [tex]\dfrac{15}{105}\approx0.143[/tex]
In percent, Required probability = 14.3%
Correct option D) 14.3%
