Without looking, Tammy takes a marble out of a bag that contains 10 red marbles, 15 green marbles, and 25 blue marbles. She records its color and returns the marble to the bag. If Tammy repeats this process 90 times, how many times can she expect to pull out a red marble?
Answer:
18 is the answer
Step-by-step explanation:
added all the marbles she took out to see the total she took out which was 50
if she did it 90 times I need to see how much time 50 she did it more and that was so 90 divided by 50 is 1.8 and that times 10
(times because we want to see how many times the red marble would come out) and that’s 18
hope this helps u
Have a nice day : )
Mark brainliest
The ratio x:y is 1:3
Which of the following statements are correct?
A. x is 1/3 of y
B. y is 2 of (x + y)
C x is 1/4 of y
D. y is 3/4 of x
Answer:
A. & B. are the corect answers
Step-by-step explanation:
Answer:
A and B
x is [tex]\frac{1}{3}[/tex] of y
AND
y is [tex]\frac{3}{4}[/tex] of (x+y)
Step-by-step explanation:
x:y is 1:3
=> y is bigger than x
=> y is 3x bigger than x
=> y = 3 lots of x
=> [tex]y =[/tex] [tex]3x[/tex]
=> [tex]\frac{y}{3}[/tex] [tex]= x[/tex]
=> [tex]\frac{1}{3} y[/tex] [tex]= x[/tex]
So x is [tex]\frac{1}{3}[/tex] of y
y is [tex]\frac{3}{4}[/tex] of (x+y)
If x = 1 and y = 3 (substitute in values)
=> 3 is [tex]\frac{3}{4}[/tex] of (4)
=> 3 is [tex]\frac{3}{4}[/tex](4)
=> 3 is ([tex]\frac{3}{4}[/tex]x4)
=> 3 = 3
Therefore, y is [tex]\frac{3}{4}[/tex] of (x+y) is true
So the answers are:
x is [tex]\frac{1}{3}[/tex] of y
AND
y is [tex]\frac{3}{4}[/tex] of (x+y)
It rains 7 out of every 10 days.
What is the chance of rain on one day?
Answer:
if it rains 7 out of 10 days the chance of rain for one day is 70%
Step-by-step explanation:
A lampshade has a height of 12cm and upper and lower diameters of 10cm and 20cm A)what area of material is required to cover that curved surface of the frustum B)what is the volume of the frustum (Give both answers in terms of pie)
Answer:
[tex](a)\ Area = 195\pi[/tex]
[tex](b)\ Volume = 700\pi[/tex]
Step-by-step explanation:
Given
[tex]h = 12[/tex]
[tex]d_1 = 10[/tex] --- lower diameter
[tex]d_2 = 20[/tex] --- upper diameter
Solving (a): The curved surface area
This is calculated as:
[tex]Area = \pi l(r_1 + r_2)[/tex]
Where
[tex]r_1 = 0.5 * d_1 = 0.5 * 10 = 5[/tex] --- lower radius
[tex]r_2 = 0.5 * d_2 = 0.5 * 20 = 10[/tex] --- upper radius
And
[tex]l = \sqrt{h^2 + (r_1 - r_2)^2[/tex] ---- l represents the slant height of the frustrum
[tex]l = \sqrt{12^2 + (5 - 10)^2[/tex]
[tex]l = \sqrt{12^2 + (-5)^2[/tex]
[tex]l = \sqrt{144 + 25[/tex]
[tex]l = \sqrt{169[/tex]
[tex]l = 13[/tex]
So, we have:
[tex]Area = \pi l(r_1 + r_2)[/tex]
[tex]Area = \pi * 13(5 + 10)[/tex]
[tex]Area = \pi * 13(15)[/tex]
[tex]Area = 195\pi[/tex]
Solving (b): The volume
This is calculated as:
[tex]Volume = \frac{1}{3}\pi * h * (r_1^2 + r_2^2 + (r_1 * r_2))[/tex]
This gives:
[tex]Volume = \frac{1}{3}\pi * 12 * (5^2 + 10^2 + (5 * 10))[/tex]
[tex]Volume = \frac{1}{3}\pi * 12 * (25 + 100 + (50))[/tex]
[tex]Volume = \frac{1}{3}\pi * 12 * (175)[/tex]
[tex]Volume = \pi *4 * 175[/tex]
[tex]Volume = 700\pi[/tex]
HELPPPPPP
solve the equation for x
2/3x-1/9x+5=20
Answer:
x=27
Step-by-step explanation:
You want to isolate the variables so you subtract 5 from both sides. Therefore the equation will be 2/3x-1/9x=15. You want to take away the fraction because no one likes fractions. You have to multiply everything by 9. Therefore, the equation will be 6x-x=135. 5x=135. You want to isolate x so you have to divide each side by 5. x=135/5. Simplify to get x=27.
If this has helped you please mark as brainliest
dont answer if u dont know please!!
Answer:
Step-by-step explanation:
A bag contains 5 red marbles, 3 blue marbles and 6 green marbles. If two marbles are drawn out of the bag, what is the exact probability that both marbles drawn will be green?
Answer:
15/91
Step-by-step explanation:
P(G,G) = 6/14 x 5/13 = 15/91
I need answers asap please!!!:)
Answer:
70 mb
Step-by-step explanation:
264 picture = 528 mb
35 pictures = ?
Solve for one picture:
Variable x = mb per 1 picture
264/528 = 1/x
Cross multiply:
264 × x = 528 × 1
264x = 528
x = 528 ÷ 264
x = 2
Each picture takes up 2 mb.
Multiply the number of pictures per 2 mb:
35 pictures × 2 mb
70 mb total
Given circle Q a measure of SR = 120 degree and a radius of 9 feet, as shown below determine the arc length of SR use mathematics to explain how you determined your answer. 
Volume and circles
Help please ❤️
Answer:
Arc length SR = 18.85 ft
Step-by-step explanation:
To get the arc length, we use the formula below
theta/360 * 2 * pi * r
theta is the central angle subtended by the arc which is 120 degrees
r is the radius of the circle which is 9 ft
Substituting these values, we have
120/360 * 2 * 3.142 * 9
= 18.85 ft
Help??????????????????
Answer:
40
Step-by-step explanation:
52= 1/2(64 + x)
52 = 32 + 0.5x
52-32= 32-32 + .5x
20=.5x
Divide both sides by .5x
X = 40.
Two similar cylinders have radii of 15 inches and 6 inches. What is the ratio of the surface area of the small cylinder to the surface area of the large cylinder.
Answer:
4:25
Step-by-step explanation:
Given that,
r₁ = 15 inches, r₂ = 6 inches
The area of the cylinder is given by :
[tex]A=2\pi rh+2\pi r^2[/tex]
The ratio of surface areas of two cylinders,
[tex]\dfrac{S_2}{S_1}=\dfrac{2\pi r_2h_2+2\pi r_2^2}{2\pi r_1h_1+2\pi r_1^2}\\\\\dfrac{S_2}{S_1}=(\dfrac{r_2}{r_1})^2\\\\=\dfrac{6}{15}^2\\\\=\dfrac{4}{25}[/tex]
Hence, the required ratio is 4:25.
Help plzzzzzz 1. Use your expression from Exercise 15 to find the total cost of 8 play tickets and 8 choir concert tickets
exercise 15 is Rory buys t play tickets at $14.50 per ticket and t choir concert tickets
at $5.50 per ticket. What is the cost for play tickets and choir concert
tickets?
plz help
Answer:637
Step-by-step explanation:
7362 is the andwrr
X m, 6 m, 12 m
mathematics and inaquality
Answer:
djajahshshsk manually sjss
Silas took 17 bags of glass to the recycling center. He still has 8 bags of plastic to take to the recycling center. Which equation could
be used to find x, the total number of bags of glass and plastic Silas will take to the recycling center?
A.x-8=-17
B.17-x=8
C. X+17=8
D. X-17=8
can someone please help me with this it's due at 11:59
Answer:
Step-by-step explanation:
perimeter = 74+74+93+93 = 334 ft
area = (74× 93) = 6882 ft²
b . area
c. perimeter
Answer:
Step-by-step explanation:
the product of gordan’s age and 4 is 52
Helpppppppppopppppopjompmpnkbkbkbkhhhhhhhhhhhhhhhhhhhhhhhhhhhhghhhghhhhhhhh
You have a piggy bank that contains 2 pennies, 4 nickels, 8 dimes, and 6 quarters. Find the probability of picking a coin worth more than 10 cents. .
Answer:
The probability is 3/10
Step-by-step explanation:
So a quarter is the only coin that’s worth more than 10¢ so 6/20 = 3/10
help me plz i’m begging :(
Answer:
(x2 +2x+1)+(y2+4y)=31+1
(x+1)2 +(y2+4y)=32
(x+1)2 +(y2+4y+4)=32+4
(x+1)2 +(y+2)2=36
The equation can be written in the form (x-p)2 +(y-q)2=r2
so it represents a circle with the radius r=6 and the center (-1,-2)
Step-by-step explanation:
Answer:
6 units is the amswer
Step-by-step explanation:
here you gooo
Please I need emergency help.......
Answer:
C)
Step-by-step explanation:
Given α and β are Supplementary. Show the necessary steps.
If α =3/2β then, what is α = ? and what is β = ?
Answer:
[tex] \alpha = 108\degree, \: \beta = 72\degree [/tex]
Step-by-step explanation:
α and β are Supplementary (given)
[tex] \therefore \alpha + \beta = 180\degree.... (1)[/tex]
It is given that:
[tex] \alpha= \frac{3}{2} \beta[/tex]
Plugging the value of α in equation (1), we find:
[tex] \frac{3}{2} \beta + \beta = 180\degree[/tex]
[tex]\therefore \frac{3+2}{2} \beta = 180\degree[/tex]
[tex]\therefore \frac{5}{2} \beta = 180\degree[/tex]
[tex]\therefore \beta = 180\degree\times \frac{2}{5}[/tex]
[tex]\therefore \beta = 72\degree[/tex]
[tex]\implies \alpha= \frac{3}{2} \times 72\degree= 108\degree [/tex]
So,
[tex] \alpha = 108\degree, \: \beta = 72\degree [/tex]
True or False: △XYZ has sides XY, YZ and XZ that measure 15 cm, 20 cm, and 25 cm respectively is a right triangle.
Please answer please
Answer:
True
Step-by-step explanation:
As a right triangle, it follows the Pathagorem Therom. All you have to do is multiply 15 x 15 = 225 and 20 x 20 = 400, then finally, you would do 25 x 25, which is the biggest number of all, and get 625. Since 225 + 400 = 625, this follows the Pathagorem Therom.
Twice once number added to another number is 18. If the second number is equal to 12 less than 4 times the first number, find the first two numbers.
2x+y= 12 ; y= __x - __
I really need help with the second part...
Step-by-step explanation:
2x+y= 12
= 12,18
= 36
so the value of y is 36
value of x is 48
Ben walks to the zoo, and then walks to the city park. What is the least number of blocks Ben walked?
Solution :
It is given in the question that Ben goes to the zoo by walking and then he walks down to the city park. He moves several blocks while walking from his home to the zoo and then to the city park.
The figure is provided below.
So from the picture, the least number of blocks that Ben had walked from his home to the city park can be found out by counting the number of blocks he moved.
So the least number of blocks will be = 19
The heights of the girls on a basketball team are shown in the table.
pls hurry
Find X and angles R and L. Please help me with this
Pl help it’s for a grade I will give Brainly if right
Answer:
I am pretty sure its 1.99
Step-by-step explanation:
12/10.99= ~1.09
24/25.99=~0.80
1.09+0.80=1.99
Please help brainiest to correct answer
Answer:
x = 1+sqrt(69)/8 about 2.0383
or
x = 1-sqrt(69)/8 about -0.0383
Step-by-step explanation:
Use the quadratic formula:
(Move 17 to the left side first though)
(-b±√(b²-4ac))/2a
(1±sqrt(1-4*1*-17))/2(4)
x = 1±sqrt(69)/8
The most efficient method is the quadratic equation because the equation is not easily factorable and a!=1.
Line m is represented by the equation below. Select all equation that represent lines perpendicular to line m.
Answer:
y = -2/3x + 4
y+1 = -4/6(x + 5)
Step-by-step explanation:
y = -2/3x + 4
y+1 = -4/6(x + 5) *-4/6 is equal to -2/3
perpendicular lines have slope that are opposite signs and reciprocals
the slope of the original line in this problem is 3/2 so any line with a slope of -2/3 is perpendicular to it
Answer:
it will be any equation with a slope that is the opposite reciprocal of 3/2 or it's equivalent. So in this case, -2/3. be sure to check the negative does and see if other slopes are the same as -2/3 but in a different form.
Exponential functions are in the form f(x)=a(b)x−h+k. What does a negative "a" value do the graphed equation?
Moves the equation "a" spaces right
Moves the equation "a" spaces right
Moves the equation "a" spaces left
Moves the equation "a" spaces left
The "a" value can't be negative
The "a" value can't be negative
Reflects the graph over the y-axis
Reflects the graph over the y-axis
Reflects the graph over the x-axis
please answer as soon as possible for brainlist
in a school ,the number of boys who play cricket is 3 times as much as a number of boys who play tennis. if 12 boys, who play cricket, play tennis instead, the number of boys who play each of these sports would be the same. find the number of boys who play tennis
Answer:
The number of boys who play tennis is 36.
Step-by-step explanation:
Let the number of boys who play tennis is x.
number of boys who play cricket = y
x = 3 y..... (1)
12 boys plays both cricket and tennis.
According to the question,
x - 12 = y + 1 2
3 y - 12 = y + 12
2 y = 24
y = 12
So, the number of boys who plays tennis is x = 3 x 12 = 36.