Answer: She is expected to select 2 pennies 36 times.
Step-by-step explanation:
In jar , we have
6 pennies and 4 nickels
Total coins = 10
The probability of getting two pennies ( with replacement) =
[tex]\dfrac{\text{Number if ways to get 2 pennies}}{\text{Total ways to select 2 coins}}\\\\=\dfrac{6\times6}{10\times10} \ \ [\text{independent events]}\\\\=\dfrac{36}{100}[/tex]
If Margo repeats the experiment 100 times, then expected number of times to select two pennies = [tex]\dfrac{36}{100}\times100=36[/tex]
She is expected to select 2 pennies 36 times.
We will see that Margo can expect to randomly select two pennies 36 times.
Probability of selecting two pennies at random.
The probability of selecting a penny at random is equal to the quotient between the number of pennies in the jar and the total number of coins in the jar, this is:
p = 6/10
And doing that two times, needs that probability two times, so the probability of selecting two pennies is:
p = (6/10)*(6/10) = 36/100
How many times she can expect to select 2 pennies in 100 attempts?Here we just need to multiply the above probability by 100, we will get:
(36/100)*100 = 36
So she can expect to get two pennies 36 times.
If you want to learn more about probability, you can read:
https://brainly.com/question/251701
Solve
x2 + 2x – 15 = 0
Answer:
x = - 5, x = 3
Step-by-step explanation:
Given
x² + 2x - 15 = 0
Consider the factors of the constant term (- 15) which sum to give the coefficient of the x- term (+ 2)
The factors are + 5 and - 3 , since
5 × - 3 = - 15 and 5 - 3 = + 2, so
x² + 2x - 15 = 0
(x + 5)(x - 3) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 5 = 0 ⇒ x = - 5
x - 3 = 0 ⇒ x = 3
Tim's pay increased by 5% to £880
a fortnight.
What was his pay before the
increase?
Answer:
£838.10Step-by-step explanation:
Let the previous salary be x
Increase = 5%
New salary = £880
x + 5% = 880x*1.05 = 880x = 880/1.05x = £838.10 (rounded)Answer:
£838.10Step-by-step explanation:
let x be past payaccording to the question
[tex]x \times \frac{105}{100} = 880[/tex]
[tex]x = 880 \times \frac{100}{105} [/tex]
[tex]x = 838.10[/tex]
what is 68,302 divided by 1,000
PLS HELP Anna buys bananas and apples. She buys 2 more apples than twice the number
of bananas. Altogether, Anna bought 14 fruits. How many apples did she buy?
(Hint use a bar model)
Your answer
Answer:
You have to put this in a bar model yourself so convert it later
She bought 10 apples
Step-by-step explanation:
3x + 2 = 14
why i did this
because she bought 2 times the amount of bananas, it should be x + 2x = 3x
then i added two because she bought two extra apples
so 3x+2 = 14
subtract 2
3x = 12
x = 4
So now we substitute x in apples
2x +2 = # of apples
8 +2 = 10
check
10 - 2 = 8
8/2 = 4
4 = # of bananas
Answer:
Anna bought 4 bananas and 10 apples.
Step-by-step explanation:
System of Equations
Let's call the following variables:
x = number of bananas Anna buys
y = number of apples Anna buys
She buys 2 more apples than twice the number of bananas, thus:
y = 2x + 2 [1]
Anna bought 14 fruits in total, thus:
x + y = 14 [2]
Substituting [1] in [2]:
x + 2x + 2 = 14
Simplifying:
3x = 12
Dividing by 3:
x = 4
Substituting in [1]:
y = 2*4+2 = 10
Anna bought 4 bananas and 10 apples.
PLEASE HELP I NEED THIS DONE VERY FADT PLZZZ
Answer:
Angle 4 is 65°
Step-by-step explanation:
180-115=65
Answer:
m<4 would be 65 degrees.
Step-by-step explanation:
You know they add up to 180, so 180 - 115 = 65 degrees.
The question is the link
Answer:
The answer is the girls ate more.
Step-by-step explanation:
I divide the amount of ice cream for the girls and the boys and the results came out as the girls ate more then the boys.
what the square root of 2000
Answer:
44.7213595
Step-by-step explanation:
I need to write something here apparently
Write a situation to represent the equation
Y = 5x
81, 6, 7, 1, 42
Mode ??
Median ??
Answer:
No mode
Median 7
Step-by-step explanation:
Mode: The mode is the element that occurs most in the data set. In this case, all elements occur only once, so there is no mode.
Median: Arrange the data in an ascending order and the median is the middle value. If the number of values is an even number, the median will be the average of the two middle numbers.
Answer:
Mode: no mode
No mode because there are no repeating numbers.
Median=7
Put in order from least to greatest- 1,6,7,42,81
Find the one in the middle- 7
Square root 5 x square root 5 x square root 2 x square root 2
Answer left in surds
Answer:
10 or [tex]\sqrt{100}[/tex] (in surds)
Step-by-step explanation:
[tex]\sqrt{5}[/tex] × [tex]\sqrt{5}[/tex] × [tex]\sqrt{2}[/tex] × [tex]\sqrt{2}[/tex] = 5×2 = 10 or [tex]\sqrt{100}[/tex]
When the same square root multiply each other, they equal to the number in the square root. E.g. [tex]\sqrt{5}[/tex] × [tex]\sqrt{5}[/tex] = 5 because [tex]\sqrt{5}[/tex] × [tex]\sqrt{5}[/tex] also equals to [tex]\sqrt{25}[/tex], which is 5.
Hope this is helpful :)
Thomas has constant speeds for both running and walking. When a down-escalator is moving, Thomas can run down it in 15seconds or walk down it in
30seconds. One day, when the escalator was broken (and stationary), it took Thomas
20seconds to run down it.
How long, in seconds, would it take Thomas to walk down the broken escalator?
HELP ME ASAP
Answer:
amswer is 7mph
Step-by-step explanation:
i said so
Find the Y intercept of the line y-3=2(x + 1)
Answer:
y=2x+1
Step-by-step explanation:
pls anwer fast is due in 5min
Answer:
Taking my points
Step-by-step explanation:
You spammed my own question
What is the value of y?
Enter your answer in the box.
what is the equation of the blue line
The equation of the blue line will be
y = 4x -3
The equation of the line that passes through the points (1, 1) and (2, 5) is y = 4x - 3.
We have,
To find the equation of the line that passes through the coordinates (1, 1) and (2, 5), we can use the point-slope form of the equation of a line.
The point-slope form of the equation is:
y - y1 = m(x - x1)
Where (x1, y1) represents one of the given points on the line, and m represents the slope of the line.
First, let's calculate the slope (m) using the given coordinates:
m = (y2 - y1) / (x2 - x1) = (5 - 1) / (2 - 1) = 4 / 1 = 4
Now, we can choose either of the given points and substitute its coordinates into the point-slope form. Let's use (1, 1):
y - 1 = 4(x - 1)
Simplifying the equation:
y - 1 = 4x - 4
y = 4x - 3
Therefore,
The equation of the line that passes through the points (1, 1) and (2, 5) is y = 4x - 3.
Learn more about the equation of a line here:
https://brainly.com/question/23087740
#SPJ2
Lesson 3.3T - Calculating Slope from Graphs
Name
Period
Date
Sketch a line that has the given slope.
1. Positive Slope
2. Negative Slope
3. Zero Slope
4. Undefined Slope
Itt
Draw a slope triangle for each line (when possible) and give the slope. Remember to designate
if slope is positive or negative.
5.
6.
Remember
that slope is
rise over run.
SLOPE =
SLOPE =
8.
2
4-3
.
-2
SLOPE
SLOPE =
EdGems Core - Course 3
Copyright 2018 All Rights Reserved
Lesson 3.3 - Calculating Slope from Graphs
Answer:
1. draw a line from the bottom left quadrant to the top right quadrant
2. draw a line from the top left quadrant to the bottom right quadrant
3. draw a horizontal line in any quadrants
4. draw a vertical line in any quadrants
5. Connect to the dots by going up to and right two. The slope will be 1.
6. Connect the dots by going up four and left two. The slope will be -2.
7. Connect the dots by going up for and right one. The slope will be 4.
8. You cannot connect the dots because it's a zero slope, so the slope is 0.
Step-by-step explanation:
Hope this helpsss! :)
In rectangle FGHJ , the diagonals intersect at point M, FM = 3.2x , and JG = 40.
What is the value of x?
Enter your answer as a decimal in the box.
Answer:
[tex]x=6.25[/tex]
Step-by-step explanation:
FM=3.2x
JG=40
Generally the diagonal of a rectangle are equal to each other and diagonal bisects each other
Therefore
[tex]2FM=JG[/tex]
[tex]2*(3.2x)=40[/tex]
[tex]x=40/6.4[/tex]
[tex]x=6.25[/tex]
Answer:
x=6.25
Step-by-step explanation:
*starts to calm* .....
Answer:
14
its math dude
answer
-8
explanation
3-(-8) = 11
add me as brainliest please
PLZZZ HELP ME OUT........................ PLZZ
Answer:
a) constant of proportionality is 3/5
b) 3.5cm per 1 minute
c) 21 cm water in trough after 6 min
d) 70 cm
Step-by-step explanation:
d) 21 / 6 = x / 20
7 / 3 = x / 20
2x = 140
x = 70
A floral design on a floor is made up of 16 tiles which are triangular,
the sides of the triangle being 9cm, 28cm and 35cm. Find the cost of
polishing the tiles at the rate of 50p per m^2?
Answer:
Answer
Area of tiles = 16 x area of 1 Δ
S=
2
a+b+c
=
2
9+28+35
=
2
72
=36
Area=
36(36−9)(36−28)(36−35)
36×27×8×1
36
6
cm
2
Area of tiles = 16 ×36
6
=1410.20.
Cost of polishing per cm
2
= 50.
Cost of polishing = 1410.90 cm
2
1410.90 x
2
1
705.45
Step-by-step explanation:
WILL GIVE BRAINLIEST PLZZZ HELP
Answer:
its B.
Step-by-step explanation:
Which represents if x=4 then y=-2
Answer:
what are the answers?
Step-by-step explanation:
Otherwise it isn't answerable
Write the equation of the directrix of the parabola shown below.
y2 + 16y+ 4x + 4 = 0
Answer:
x = 16 is the answer
Step-by-step explanation:
3 tickets to the museum cost $12.75. At this rate, what is the cost of:
A: 1 ticket?
B: 5 tickets?
Answer:
Each ticket is $4.25 and five tickets would cost $21.25
Step-by-step explanation:
Find the missing length indicated
I WILL GIVE BRAINLIEST TO CORRECT ANSWER
Answer:
The length of the missing side is: x = 15
Thus, option A) is the correct option.
Step-by-step explanation:
Let 'x' be the missing sides.
From the given triangle, it is clear that the segment cuts the sides into proportional ratios such 9 : 12 and x : 20 respectively.
Therefore,
9 : 12 = x : 20
9/12 = x/20
cross multiplication
12 × x = 20 × 9
12x = 180
divide both sides by 12
12x/12 = 180/12
x = 15
Therefore, the length of the missing side is: x = 15
Thus, option A) is the correct option.
PLS HELPPLS PLS PLS ILL GIVE BRAINLY
Can you help me please and thank you have a great day
slope of -6,8 and -6,-8
Answer:
use math.way.com
Step-by-step explanation:
consider the expression 7 - 4y. Why would the co-efficient be -4 and not 4?
Because the answer to X is a negative number, and negative numbers are needed for negative answers
Answer: because it won’t make sense if it was 74y it has to have an equation or expression.
Step-by-step explanation: I’m not that smart and I have no friends on brainly but hope it helps and makes your day.
Can someone help I've tried many times and keep getting confused by math.
Answer:
C) y = 2/3x + 2
Step-by-step explanation:
first find the slope:
(0,2)
(3,4)
(4-2)/(3-0)
2/3
y = 2/3x + b
2 = 2/3(0) + b
b = 2
y = 2/3x + 2