Answer:
7,200,000
Step-by-step explanation:
Number of Possibilities for
A) First Digit
There are 10 digits (0, 1, 2, 3, 4, 5, 6, 7, 8, and 9) of which 0 and 1 is not allowed.
Hence there are 8 possibilities for the first digit
B) Second digit
There are 10 posibilities
C) Third digit
Since it mustn't be the same as Second digit....
There are 9 possibilities
D) Forth digit
There are 10 possibilities
E) Fifth digit
There are 10 possibilities
F) Sixth digit
There are 10 possibilities
E) Seventh digit
There are 10 possbilities
Total possible ways for the 7-digit phone number is...
8×10×9×10×10×10×10
=7,200,000 possible phone numbers
Simplify 9y+2y-5y please answer
Answer:
[tex]9y+2y-5y=6y[/tex]
Step-by-step explanation:
So we have the expression:
[tex]9y+2y-5y[/tex]
To simplify, simply combine the like terms. Therefore:
[tex]9y+2y-5y\\=11y-5y\\=6y[/tex]
Further notes:
To understand why we can combine like terms in the first place, we just need to use the distributive property. So we have the expression:
[tex]9y+2y-5y[/tex]
Now, factor out a y from the three terms:
[tex]=y(9+2-5)[/tex]
Do all the operations inside the parenthesis:
[tex]y(9+2-5)\\=y(11-5)\\=y(6)=6y[/tex]
And we moved the y back to the front!
This is the same result as before. When combining like terms, this is what we're essentially doing but without doing the distributive property manually. I hope you understand a bit better on how and why we can combine like terms!
Answer:
6y
Step-by-step explanation:
We are given the expression:
9y+2y-5y
and asked to simplify.
Each term in the expression has the same variable, a "y". Therefore, all three terms are like terms. We can combine the like terms in the expression.
First, factor out a y from each term.
9y+2y-5y
(9+2-5)*y
Solve inside the parentheses first. Add 9 and 2.
(11-5)*y
Subtract 5 from 11.
(6)*y
6y
The expression 9y+2y-5y simplified is 6y.
The following table shows scores obtained in an examination by B.Ed JHS Specialism students. Use the information to answer the questions that follow: Score 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60-64 65-69 Frequency 10 4 10 20 30 15 3 2 1 5.a. Construct a cumulative frequency curve for the data. b. Find the; i. inter-quartile range. ii. 70th percentile class scores. iii. probability that a student scored at most 50 on the examination
Please is urgent .can I get help
Answer:
(a) The cumulative frequency curve for the data is attached below.
(b) (i) The inter-quartile range is 10.08.
(b) (ii) The 70th percentile class scores is 0.
(b) (iii) the probability that a student scored at most 50 on the examination is 0.89.
Step-by-step explanation:
(a)
To make a cumulative frequency curve for the data first convert the class interval into continuous.
The cumulative frequencies are computed by summing the previous frequencies.
The cumulative frequency curve for the data is attached below.
(b)
(i)
The inter-quartile range is the difference between the third and the first quartile.
Compute the values of Q₁ and Q₃ as follows:
Q₁ is at the position:
[tex]\frac{\sum f}{4}=\frac{100}{4}=25[/tex]
The class interval is: 34.5 - 39.5.
The formula of first quartile is:
[tex]Q_{1}=l+[\frac{(\sum f/4)-(CF)_{p}}{f}]\times h[/tex]
Here,
l = lower limit of the class consisting value 25 = 34.5
(CF)[tex]_{p}[/tex] = cumulative frequency of the previous class = 24
f = frequency of the class interval = 20
h = width = 39.5 - 34.5 = 5
Then the value of first quartile is:
[tex]Q_{1}=l+[\frac{(\sum f/4)-(CF)_{p}}{f}]\times h[/tex]
[tex]=34.5+[\frac{25-24}{20}]\times5\\\\=34.5+0.25\\=34.75[/tex]
The value of first quartile is 34.75.
Q₃ is at the position:
[tex]\frac{3\sum f}{4}=\frac{3\times100}{4}=75[/tex]
The class interval is: 44.5 - 49.5.
The formula of third quartile is:
[tex]Q_{3}=l+[\frac{(3\sum f/4)-(CF)_{p}}{f}]\times h[/tex]
Here,
l = lower limit of the class consisting value 75 = 44.5
(CF)[tex]_{p}[/tex] = cumulative frequency of the previous class = 74
f = frequency of the class interval = 15
h = width = 49.5 - 44.5 = 5
Then the value of third quartile is:
[tex]Q_{3}=l+[\frac{(3\sum f/4)-(CF)_{p}}{f}]\times h[/tex]
[tex]=44.5+[\frac{75-74}{15}]\times5\\\\=44.5+0.33\\=44.83[/tex]
The value of third quartile is 44.83.
Then the inter-quartile range is:
[tex]IQR = Q_{3}-Q_{1}[/tex]
[tex]=44.83-34.75\\=10.08[/tex]
Thus, the inter-quartile range is 10.08.
(ii)
The maximum upper limit of the class intervals is 69.5.
That is the maximum percentile class score is 69.5th percentile.
So, the 70th percentile class scores is 0.
(iii)
Compute the probability that a student scored at most 50 on the examination as follows:
[tex]P(\text{Score At most 50})=\frac{\text{Favorable number of cases}}{\text{Total number of cases}}[/tex]
[tex]=\frac{10+4+10+20+30+15}{100}\\\\=\frac{89}{100}\\\\=0.89[/tex]
Thus, the probability that a student scored at most 50 on the examination is 0.89.
Lithium, sodium and potassium are very reactive metals found in Group 1 on the..
Periodic Table. Which of the following facts about this group of elements is related
to its chemical reactivity?
A Neutral atoms of group 1 elements do not have a charge.
B The Alkali Metals contain neutrons in the nucleus.
C The atoms of group 1 elements have one valence electron.
D Group 1 contains more elements than most other groups.
Answer:
Answer is C
Step-by-step explanation:
This is because Lithium =2.8.1
Sodium=2.8.8.1
Valence electron is the electron located in the last shell
Hope this is correct and helpful
HAVE A GOOD DAY!
If f(x) = −-4x^{2} + 15, then f(−3) =
Answer:
f(-3) = -21
Step-by-step explanation:
To find f(-3), we just need to plug x = -3 into f(x) so:
f(-3) = -4 * (-3)² + 15
= -4 * 9 + 15 = -36 + 15 = -21
Answer:
[tex]\Huge \boxed{-21}[/tex]
Step-by-step explanation:
[tex]f(x) = -4x^{2} + 15[/tex]
f(-3), the input is -3 for the function f(x).
The value of x = -3
[tex]f(-3) = -4(-3)^{2} + 15[/tex]
Evaluate the expression.
[tex]f(-3) = -4(9)+ 15[/tex]
[tex]f(-3) = -36+ 15[/tex]
[tex]f(-3)=-21[/tex]
The value of f(-3) is -21.
Factoriseeeee COMPLETELY 12x²y² - 17xy- 40 (Show all steps) :D be quickkkk
12x²y² - 17xy - 40
xy (12xy - 17) - 40
As the x and y are shown in both variables but there is no other common factors. I didn't include the 40 as it didn't share any common factors with all of them.
BRAINLIEST An artist has a book of clay in the shape of a cube. The edges of the cube measure 3 inches. The artist will use the clay to make models of
pine trees. Each tree will be a solid cone with a base diameter of 1.5 inches and a height of 2 inches.
Part 8
The artist plans to decorate each clay pine tree with pieces of yam that will extend directly from the top of the tree to the base of the tree.
write an equation that can be used to determine the length, x, in inches, of each piece of yam that the artist will need. Explain your
equation
Answer:
a) 22 pine trees
b) x² = 2² + 0.75²
Step-by-step explanation:
a) The volume of a cube is given as:
Volume of cube = length³
The length of the cube = length of the edges = 3 inches, hence:
Volume of cube = (3 inches)³ = 27 in³
The pine tree is the shape of a cone with diameter of 1.5 inches and a height (h) of 2 inches. The radius (r) = diameter / 2 = 1.5 inches / 2 = 0.75 inches.
The volume of the cone = πr²(h/3) = π × (0.75)² × (2/3) = 1.178 in³
The number of pine trees that the artist can make = Volume of cube / Volume of cone = 27 / 1.178 = 22.9
The number of pine trees that can be made = 22
b) The yam length need to extend from the top of the tree to the base is the same as the slant height of the cone.
Let the yam length be x, therefore:
x² = height² + radius²
x² = 2² + 0.75²
x² = 4 + 0.5625 = 4.5625
x = √4.5625 = 2.136 in
The yam length is 2,136 in
Linda earns 10 dollars each hour working part-time at a bookstore. She earns one additional dollar for each book that she sells. Let A be the amount (in dollars) that Linda earns in an hour if she sells B books. Write an equation relating A to B . Then graph your equation using the axes below. I get this right all up until the graphing. Can someone help me graph the equation properly? I have tried a question like this 2 times and we only have 3 attempts. It keeps switching on the test. My last attempt is next...
I’m thinking the graph should look like this since it starts at (0,10) and $1 for each book which is the x. I apologize if it’s wrong
Find the value of N: 1/N = 1/5 + 1/4 - 1/3 + 1/12
Answer:
1/ N = 1 / 5 + 1/ 4 - 1/ 3 + 1/12
taking L.C.M
Then,
or, 1/N = 5 + 6 / 20 - 13+ 4 / 12
or, 1/N = 11/ 20 - 7/12
or, 1/N = 14 - 12 / 60
or, 1/N = 2 / 60
NOW,
Do cross multiplication,
60 = 2N
or, 60 / 2 = N
so, N = 30
ANS
A fair coin is tossed 3 times. What
is the probability of getting 2
heads in a row, given that exactly
2 heads occur?
Answer:
The ratio of successful events A = 3 to total number of possible combinations of sample space S = 8 is the probability of 2 heads in 3 coin tosses.
Step-by-step explanation:
Answer: [tex]\dfrac{2}{3}[/tex]
Step-by-step explanation:
Given that there are exactly two heads out of three coins, we have the following possibilities:
H H T
H T H
T H H
Two of the three possible outcomes have two heads in a row.
[tex]\dfrac{\text{Number of "two heads in a row"}}{\text{Number of "exactly two heads"}}=\large\boxed{\dfrac{2}{3}}[/tex]
How do we do pemdas? What do each letter stand for?
PEMDAS is the order of operation, and is what you follow to solve a expression/equation.
PEMDAS =
Parenthesis
Exponents: This step also includes solving for any roots.
Multiplication
Division
Addition
Subtraction
Answer:
the answer is
Step-by-step explanation:
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
A wrestling mat used for high school competition is shown. The wrestling circle has a diameter of 28 feet. The inner circle has a diameter of 10 feet. What is the approximate area of the large wrestling circle (not including the inner circle)? Round your answer to the
nearest tenths place.
Answer:
537.2 ft^2
Step-by-step explanation:
For this problem, we need to find the area of both the inner and outer circle and subtract the area of the outer circle from the area of the inner circle.
The equation for the area of a circle is:
A = πr^2
So we are given the diameters of the circles. We know that the diameter of a circle is twice the radius.
Let's find the area of the 10ft diameter circle:
A_Little = π(10/2)^2 = π(5)^2 = 25π
Let's find the area of the 28ft diameter circle:
A_Big = π(28/2)^2 = π(14)^2 = 196π
So the area of the big circle excluding the inner circle would be as follows:
196π - 25π = 171π
So 171π in terms of decimals rounded to the nearest tenth would be 537.2.
Cheers.
Area of big remain circle is 536.94 feet²
Area of circle:Given that;
Diameter of big circle = 28 feet
Diameter of small circle = 10 feet
Find:
Area of big remain circle
Computation:
Radius of big circle = 28 / 2 = 14 feet
Radius of small circle = 10 / 2 = 5 feet
Area of big remain circle = π(R1² - R2²)
Area of big remain circle = 3.14(14² - 5²)
Area of big remain circle = 3.14(171)
Area of big remain circle = 536.94 feet²
Find out more information about 'Area of circle'
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Two sides of a triangle have the same length. The third side measures 7m less than twice the common length. The perimeter of the triangle is 17m. What are the lengths of the three sides? What is the length of the two sides that have the same length?
Answer:
Step-by-step explanation:
I am pretty sure your answer is 3
Answer:
2 sides=5 lonely side =7
Step-by-step explanation:
if the full perimeter is 17 and one side is just 7 then you can subtract 7 from 17 and get ten so then you can divide ten by two and get 5 for both sides.
there is a room 7 feet x 9 feet you lay a 1-foot wide plank from corner to corner touching all 4 walls how long is the plank
Answer:
Step-by-step explanation:
l^2=[(7-V2)/2]^2+(9-V2/2)^2=
49-7V2+2/4+81-9V2+2/4=
49+81+4/4-16V2=
131-16V2=108.4 ft
so l=V108.4≈10.4ft
What are the next three terms in the sequence 2, -4, 8, -16, 32, ...?
Answer:
Hey there!
The next three terms are: -64, 128, -256.
Let me know if this helps :)
Answer:
-64, 128, -256
Step-by-step explanation:
Times -2 every step
What is the area of triangle PQR?
Answer:
area = 2236 in²
Step-by-step explanation:
area of a triangle = 1/2 b h
b = 86
h = 52
plug in values
area = 1/2 * 86 * 52
area = 2236 in²
10 points And thank you for whoever answers
Answer:
B) skirt 1, white
skirt 1, black
skirt 2, white
skirt 2, black
Step-by-step explanation:
You can wear skirt type 1 in white or black, or skirt type 2 in white or black
B) skirt 1, white
skirt 1, black
skirt 2, white
skirt 2, black
Round 3.642 to the nearest hundredth
Answer:
3.64
Step-by-step explanation:
Identify the hundredth:
3.642
Check the value of the thousandth:
3.642
If the number is greater than or equal to 5, then we round up.If the number is less than of equal to 4, we round down.
2 is less than four, therefore, we will round down.
3.642 ≈ 3.64
In a regular triangle ABC with side 1, two squares MNKL, RKPT are drawn such that points M, L, R are on the side AC (the order of the points on that side is as follows: A, M, L, R, C). Points P, T are on the side BC (the order of the points on that side is as follows: B, P, T, C). And the point N is on the side AB. Find the lengths of the sides of the two squares.
Answer:
MN = (21 -6√3)/37 ≈ 0.286694RK = (14√3 -12)/37 ≈ 0.331046Step-by-step explanation:
In the attached figure, we have defined LM to be length x. Then the other lengths on side AC are ...
AM = LR = x/√3
RC = (2/√3)RK = (2/√3)(2/√3)x = 4/3x
Then the sum of lengths along AC is ...
AC = AM +ML +LR +RC
1 = x(1/√3 +1 +1/√3 +4/3) = x(7/3 +2/√3) = x(7√3 +6)/(3√3)
Then the value of x is ...
[tex]x=\dfrac{3\sqrt{3}}{7\sqrt{3}+6}=\dfrac{3\sqrt{3}(7\sqrt{3}-6)}{(7\sqrt{3})^2-6^2}=\dfrac{3(21-6\sqrt{3})}{3(49-12)}\\\\\boxed{MN=\dfrac{21-6\sqrt{3}}{37}}\\\\RK=\dfrac{2\sqrt{3}}{3}MN\\\\\boxed{RK=\dfrac{14\sqrt{3}-12}{37}}[/tex]
The southward translation of the rose garden is along which axis? What integer represents a change of four yards south?
Going south means you're going in the negative direction along the y axis
Going 4 yards south would be represented as -4 on the y axis number line (this is the vertical number line)
Answer:
Southward translation of the rose garden will move it in the negative y-direction. The integer that represents a change of four yards south is -4.
Step-by-step explanation:
I am only in my first year of 12th grade.
What is the equation of the given line? A. x=−3 B. y=−3 C. x = 1 D. y = 1
Answer:
x=1
Step-by-step explanation:
the line is one unit up from the x axis
I am 2 digit number my ones place is a digit that is 2 less than six my tens place is double the amount of my ones place What number am I?
Answer:
I believe it is 48
Step-by-step explanation:
because 4 is two less than 6, and 4 doubled would be 8
You have 19 shirts to choose from, 5 pants, and 2 pairs of shoes. How many different outfits can you make?
If 13 ounces of tea costs $3.19, how much would you expect to pay for 15 ounces of tea? (Round your answer to the nearest cent.
Answer: $3.68
Step-by-step explanation:
Solve the system of inequalities by graphing.
2x+ 5y <25
y < 3x - 2
5x - 7 <14
Answer:
b
Step-by-step explanation:
Choice b is the only one that has the first equation properly graphed. The boundary line for that equation will have intercepts that can be found by setting the opposite variable to zero.
x-intercept = 25/2 = 12.5 (on the positive x-axis)
y-intercept = 25/5 = 5 (on the positive y-axis)
That is, the boundary line has a shallow negative slope, and is shaded below. Only graph 'b' has such a line.
What is the ratio between 10 lions and14 tigers
Answer:
10:14
Step-by-step explanation:
10lions:14tigers
Answer:
5:7
Step-by-step explanation:
Lions:tigers = 10:14 = 5:7Simple math but I can't seem to understand it: x+y=2 becomes y=2-x, in order to find slope and y intercept y=mx+b The result becomes slope = -1, y intercept = 2. Though I'm not sure how to get these.
Answer:
See below.
Step-by-step explanation:
We are given the equation:
[tex]x+y=2[/tex]
And we subtracted x from both sides to acquire:
[tex]y=2-x[/tex]
Notice that this is the slope-intercept form:
[tex]y=mx+b[/tex]
Where m is the slope and b is the y-intercept.
If we rearrange our equation, we acquire:
[tex]y = -(1)x+(2)[/tex]
Therefore, m = -1 and b = 2.
In other words, the slope is -1 and the y-intercept is 2.
Answer:
[tex]\Large \boxed{{m=-1, \ b=2}}[/tex]
Step-by-step explanation:
x + y = 2
We need the equation in the form y = mx + b.
m = slope
b = y-intercept
Solve for y by subtracting x from each side.
y = 2 - x
The -x can be written as -1x.
y = 2 - 1x
Rearrange the expression.
y = -1x + 2
The equation is in form y = mx + b.
The slope is -1.
The y-intercept is 2.
Please Halp 0.3x+18=−27
Answer: x=-150
Step-by-step explanation:
To solve for x, we would need to use our order of operations.
0.3x+18=-27 [subtract both sides by 18]
0.3x=-45 [divide both sides by 0.3]
x=-150
A fruit company delivers its fruit in two types of boxes: large and small. A delivery of 5 large boxes and 3 small boxes has a total weight of 120 kilograms. A delivery of 7 large boxes and 9 small boxes has a total weight of 234 kilograms. How much does each type of box weigh?
Answer:
one large box equals 15.75kg
one small box equals 13.75kg
Step-by-step explanation:
First, identify your variables:
Let "l" represent the weight of one large box.
Let"s" represent the weight of one small box.
Then, stack the two equations on top of each other:
[tex]5l+3s=120\\7l+9s=234[/tex]
Next, multiply the first equation by 3 so we can use elimination of the "s" variable to find the "l" variable first:
[tex]3(5l+3s=120)\\7l+9s=234\\\\15l+9s=360\\7l+9s=234[/tex]
Now, subtract the two equations to cancel out the s-variable and find the l-variable:
[tex]15l+9s=360\\-(7l+9s=234)\\8l=126\\\frac{8l}{8}=\frac{126}{8}\\l=15.75[/tex]
Then, substitute your l-variable in the original first equation to find the s-variable:
[tex]5l+3s=120\\5(15.75)+3s=120\\78.75+3s=120\\78.85-78.75+3s=120-78.75\\3s=41.25\\\frac{3s}{3}=\frac{41.25}{3}\\s=13.75[/tex]
With all the information that is collected, you find that one large box weighs 15.75kg and one small box weighs 13.75kg.
Please help: A recipe for a pizza that serves 12 people calls for 2 cups of shredded cheese. If each bag of shredded cheese contains 3 cups, what is the minimum
number of bags required to make pizza for 48 people?
Answer: 3
Step-by-step explanation:
Given: A recipe for a pizza that serves 12 people calls for 2 cups of shredded cheese.
12 people = 2 cups of shredded cheese.
Multiply 4 on both sides , we get
48 people = 8 cups of shredded cheese.
So we require 8 cups of shredded cheese to make pizza for 48 people.
Since, each bag of shredded cheese contains 3 cups.
Then minimum number of bags required = [tex]\dfrac{8}{3}=2.67\approx3[/tex]
Hence, minimum 3 bags required to make pizza for 48 people.
A sector subtends an angle of 70 at the centre of a circle of radius 21cm. Calculate the area of the sector?
Answer:
12.8 cm^2
Step-by-step explanation:
Angle subtended by the sector=70
Radius of the circle= 21 cm
Area of the sector =[tex]\frac{given angle}{360}[/tex] x [tex]\pi r^{2}[/tex]
= [tex]\frac{70}{360}* \frac{22}{7}*21\\\\\frac{70}{360 } *22*3\\\frac{77}{6}\\ 12.8[/tex]