Answer:
6-18i
Step-by-step explanation:
You solve each one and this is basically simplifying the question
(2+4i)=6
(-3-3i)=-6
A picture is mounted on a frame measuring 25 centimeters by
15 centimeters. It has a border of 3 centimeters round it. Find the area
and perimeter of the picture.
25 cm
13 cm
A=kW
P-HIWAW
3 cm
picture 3 cm
115 cm
13 cm
cm
Answer:
I think it's 1,125 and 4485
Step-by-step explanation:
25x13x3
115x13x3
PLEASE ANSWER!!!!!!!!!
Answer:
1/15
Step-by-step explanation:
no. of students who participate in all of the three activities is 2.
So, the possibility is 2/15 = 1/15
Ans: 1/15
K.8 Complete a table and graph a proportional relationship 7th grade math
but it has to be in a zooom bc its alot of questions
Answer:
Someone gave me da link to dis
Step-by-step explanation:
12. Nitrogen is a gas at certain temperatures under normal conditions. These temperatures (1), in degrees
Celsius (°C), are represented by the inequality 1. Which best describes the meaning of the inequality?
A. Nitrogen is a gas only if the temperature is below 100G.
B.Nitrogen is a gas only if the temperature is above 195 c.
C.Nitrogen is a gas only if the temperature is at or below 196°C.
D.Nitrogen is a gas only if the temperature is at or above 190C.
PLLLLLLLLLLLEEEEEEEEEEEEEEEzzzZZzZzZZZZZzzzzZZZZ HEEEEEEEEEEEEEEEELLLLLLLLLLLPPPPPPPPP ASAP
Answer:
there is no question my man
Answer:
With what?
Step-by-step explanation:
An electrical shop reduces display goods by 5% .A display TV is sold for £380. what is the usual price of the tv
Answer:
380-5%
Step-by-step explanation:
Answer:
£399
Step-by-step explanation:
personally its easier to find 1% first then multiply it by how many percent are needed to be found.
380/100=1%
380/100=3.8
3.8x5=5%
3.8x5=19
380+19=usual price
380+19=199
assume that of today, the aanualized interst rate on a three year security is 10 % and the annualized interest rate on a two year security is 7%. use this information to estimate the one year forward rate two years from now
Answer:
The shoes belonging to my three uncles are always dirty.
Can you help me image is here which 2 Should I drag
Answer:
for 6, you drag 36. for 7, you drag 42.
Step-by-step explanation:
It is using time tables by x6
Divide using a common factor of 2 to find an equivalent fraction for 2/6
A: 1/6
B: 1/3
C: 3/6
D: 2/3
I hate math
Answer:
The answer is D
Step-by-step explanation:
Five friends went out to lunch. They each
started with the same amount of money,
and they each spent $3 on lunch. They
ended with a combined total of $45. How
much did each of them have at the start?
Answer:
Each friend started with $9
Step-by-step explanation:
45 / 5 = 9
Four points are drawn on the coordinate plane and connected with straight lines to form a rectangle. Three of the vertices of the rectangle are located at (2, 1), (2, 4) and (4.4). a What are the coordinates of the fourth vertex of the rectangle? b. What are the dimensions of the rectangle? c What is the area of the rectangle?
You have 2 points with the same x value of 2 and 2 points with the same y value of 4.
You now need 2 points with the same x value of 4 ( you are given 1) and 2 y values of 1 ( you are given 1.
The missing point would need to be (4,1)
The width would be x2-x1 = 4-2 = 2 units
The length would be y2-y1 = 4-1 = 3 units
Area = 3x 2 = 6 square units
Help me with number
4,5,6,7
Answer
number
4.D
5.B
6.C
7.BHopes this helpThe total area of a rectangle is represented by (x²+9 x+18) sq units.Find the expression for the dimensions of the rectangle.
Answer:
x+3 units and x+6 units
Step-by-step explanation:
Give the total area of a rectangle is represented by (x²+9 x+18) sq units.F
Factorize
x²+9 x+18
- x^2 + 6x + 3x + 18
= x(x+6) + 3(x+6)
= (x+3)(x+6)
Since Area = Length * Width
The dimensions of the rectangle are x+3 and x+6 units
How many solutions does y=3/4 x + 12 y= 4/3 x have
Answer:
all you have to do is use Desmos graphing calculators and there you go you will thank me later
Determine the mean, standard deviation, and five number summary of each data set round to the nearest hundredth, if necessary
I'll do problem 3 to get you started.
---------------------------------------------------------
Part 1) Finding the mean:
The mean is found by adding up all the numbers and dividing by n, where n is the number of items in the set.
We sum the numbers to:
5+8+5+9+6+15+9+3+8+7+10+12 = 97
Then we divide over n = 12
mean = sum/n = 97/12 = 8.083333 approximately
This rounds to 8.08
---------------------------------------------------------
Part 2) Finding the standard deviation:
I'm assuming your teacher is talking about the population standard deviation, as opposed to the sample standard deviation.
First subtract each value from the mean. It helps to make a table as shown in the attachment below.
Column A is the original data set. Column B is when we subtract each data item x from the mean M.
Column C is where we square each item in column B.
Adding up everything in column C leads to 118.916666666667 which is approximate. This value is highlighted in the table diagram. Divide this over n = 12 to get 9.90972222222222 which is also approximate
The last step is to apply the square root to that and we get 3.1479711279
This rounds to 3.15
---------------------------------------------------------
Part 3) Finding the min:
From here on out, we have fairly simple calculations and don't need to involve a spreadsheet or any complicated formulas.
The min value is the smallest value of the set. So that would be 3
---------------------------------------------------------
Part 4) Finding the value of Q1, first quartile:
Sort the items in ascending order, ie from smallest to largest.
You should get this set: {3, 5, 5, 6, 7, 8, 8, 9, 9, 10, 12, 15}
There are n = 12 items here, so the median is between slot 12/2 = 6 and slot 7. The values in slot 6 and 7 are the two copies of '8'. That must mean the median is (8+8)/2 = 8.
Now break up the set into two equal halves
L = {3, 5, 5, 6, 7, 8} = lower half of six items
U = {8, 9, 9, 10, 12, 15} = upper half of six items
The median of set L is exactly the value of Q1, so that would be (5+6)/2 = 11/2 = 5.5; note how this is exactly between the two middle most values of 5 and 6.
---------------------------------------------------------
Part 5) Finding the median:
We found that earlier in part 4. The median is 8.
---------------------------------------------------------
Part 6) Finding the value of Q3, third quartile:
Focus on set U = {8, 9, 9, 10, 12, 15}, which was the upper set of values, ie values larger or equal to the median.
The middle two values here are the '9' and '10'. The median is at the midpoint of these values: (9+10)/2 = 19/2 = 9.5
We have Q3 = 9.5
---------------------------------------------------------
Part 7) Finding the max:
The max is the largest item in the original set
Refer to the sorted set {3, 5, 5, 6, 7, 8, 8, 9, 9, 10, 12, 15} and we see that 15 is the max.
---------------------------------------------------------
Part 8) Finding the IQR (interquartile range):
Subtract the values of Q3 and Q1 to get the IQR
IQR = Q3 - Q1
IQR = 9.5 - 5.5
IQR = 4
---------------------------------------------------------
Part 9) Finding the range:
The range is a similar idea as the IQR; however, we'll subtract the max and min this time.
Range = max - min = 15 - 3 = 12
The range is 12.
The range, IQR and standard deviation all help us determine the spread of the data. The larger the value gets, the more spread out the data is.
---------------------------------------------------------
Summary:
Mean = 8.08 (approximate)Standard Deviation = 3.15 (approximate)Min = 3Q1 = 5.5Median = 8Q3 = 9.5Max = 15IQR = 4Range = 12Side note: The phrase "five number summary" refers to the five values of: min, Q1, median, Q3, max. All of which are needed to form a box-and-whisker plot.
Find the measure of 45.
*5 = [?]
Answer:
angle7 = 80 (because vertically opposite angles are always equal)
angle7 + angle5 = 180 (because is a straight line)
80 + angle5 = 180
angle5 = 180 - 80
angle5 = 100
A news report states that the 95% confidence interval for the mean number of daily calories consumed by participants in a medical study is (1850, 2090). Assume the population distribution for daily calories consumed is normally distributed and that the confidence interval was based on a simple random sample of 22 observations. Calculate the sample mean, the margin of error, and the sample standard deviation based on the stated confidence interval and the given sample size. Use the t distribution in any calculations and round non-integer results to 4 decimal places.
Answer:
The sample mean is of 1970 daily calories.
The margin of error is of 120 daily calories.
The sample standard deviation is of 12.3 daily calories.
Step-by-step explanation:
Mean number of daily calories consumed by participants in a medical study is (1850, 2090).
The sample mean is the mean of the bounds of the confidence interval. So
[tex]M = \frac{1850 + 2090}{2} = 1970[/tex]
The sample mean is of 1970 daily calories.
Margin of error:
The margin of error is the difference between the bounds and the sample mean. So
2090 - 1970 = 1970 - 1850 = 120
The margin of error is of 120 daily calories.
Sample standard deviation:
Now I have to expand a bit into the t-distribution. So
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 22 - 1 = 21
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 21 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975[/tex]. So we have T = 2.08
The margin of error is:
[tex]M = T\frac{s}{\sqrt{n}}[/tex]
In which s is the standard deviation of the sample.
Since [tex]M = 120, T = 2.08, n = 22[/tex]
[tex]120 = 2.08\frac{s}{\sqrt{22}}[/tex]
[tex]s = \frac{120}{2.08\sqrt{22}} = 12.3[/tex]
The sample standard deviation is of 12.3 calories.
please answer all the questions for brainliest and 40 points also if you don't answer the question on correctly I will report and you will not get anything
1. Patrick made a scale drawing of a newly planned hotel.
The height of the scale drawing is 27 inches. The actual height of the hotel would be _________ ( Responses: 54, 243, 270, 600) _________ meters.
2. Mr. Twain asked the students in his class to redraw the figure below using a scale factor of 3. Then, he asked students to tell him one of the new side lengths of the figure. Some student responses are below.
Student Response
Mark 5 in.
Samantha 6 in.
Divia 1.3 in.
Cheng 0.9 in.
Candice 11.7 in.
Select the student that answered Mr. Twain's question correctly.
A. Mark
B. Divia
C. Cheng
D. Candice
3. Louis is constructing a scale model of a regulation size soccer field that measures 90 meters wide and 120 meters long. If the longest side of his model is 24 cm long, what is the width of the model?
A. 4.5 cm
B. 18 cm
C. 22.5 cm
D. 32 cm
4. Two sides of a triangle are 2 inches and 7 inches. Which could be the length of the third side? Select Yes or No for each measurement.
Yes No
5 inches
6 inches
8 inches
10 inches
5. A triangle has a side 3.5 inches in length, a 34° angle, and a 49° angle. Which of the following statements about this triangle are false? Select two that apply.
A. This triangle must have two sides that are 3.5 inches in length.
B. This triangle is an obtuse triangle.
C. This triangle could be a scalene triangle.
D. This triangle is an isosceles triangle.
6. Select the figure that can be formed when a cube is cut by a plane parallel to its base.
A. line
B. square
C. trapezoid
D. triangle
7. Select all figures that can be formed when a rectangular pyramid is cut by a plane parallel to its base.
A. point
B. rectangle
C. trapezoid
D. triangle
8. This is a cylinder.
Select all figures that can be formed by a vertical slice perpendicular to the bases of the cylinder.
A. circle
B. line segment
C. rectangle
D. oval
9. A family just removed a big tree from their backyard. The diameter of the circular hole left behind is 7 feet across. Approximately how many square feet of grass will the family need if they want to cover the area where the tree once was?
A. 22 ft²
B. 39 ft²
C. 44 ft²
D. 154 ft²
Answer:
2. is b
3.is d
4.is b
5
Step-by-step explanation:
I've done these before
have a good grade
Grace has a rectangular rug with an area of 180 square feet. The rug is 6 feet longer than four times the width. Write an equation and solve it to find the dimensions. Grace then adds 1.5 foot border all the way around the rug. What is the area of the enlarged rug?
Help! See the question below!
Jordyn is weighing the ingredients on a kitchen scale to make bread. The bowl weighs 1 12 pounds. He adds several scoops of flour. the total weight of the bowl and the flour is 2 34 pounds. If each cup weighs 516 pound, how many cups of flour does he add?
Answer:
4 POUNDS OF FLOUR
Step-by-step explanation:
The number of cups of flour he added is 4.
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
Bowl weight = 1(1/2) pounds
Number of cups of flour weight = x pounds
Now,
Total weight = 2(3/4) pounds
1(1/2) + x = 2(3/4)
x = 11/4 - 3/2
x = (11 - 6)/4
x = 5/4
Now,
Weight of each cup of flour = 5/16 pounds
Now,
The number of cups of flour.
= 5/4 ÷ 5/16
= (5 x 16) / (4 x 5)
= 4
Thus,
The number of cups of flour is 4.
Learn more about expressions here:
https://brainly.com/question/3118662
#SPJ2
which expressions are equivalent to 2 to the power of 6? Choose ALL that apply
need help for geometry question
Answer:
Step-by-step explanation:
sin^-1 (21/67) = 18.27 degrees
√(67)^2 - (21)^2 = 63.62
I need help please anyone can help me???!
2x(x-1) = 2x - 2
Step-by-step explanation:
a thing my math teacher always taught that sticks is that the equals sign is essentially the words is the same as. Think of it this way the sentaxe would be 2x -2 is the same as 2x minus 2. we get this because initially with the parentheses we have to take the number outside which is 2 and multiply everything inside by it. 2 times x equals 2x and 2 times -1 is negative 2.
True or false: As long as its argument is restricted to [0,2pi] the polar form of a complex number is not unique.
Some say its true, some say its false. I'm sure one of the answers I looked at is correct, but some teachers probably purposefully left a one star
Answer:
true
Step-by-step explanation:
i think
pls help i dont get it
make sure to show how you got your answer
Answer: 0.075
Step-by-step explanation: when you are working with percentages to decimals you want to move the decimal two places to the left. If you are working with decimals and you want to make it a percentage you would move the decimal two places to the right.
Answer:
7.5% = 0.075
Step-by-step explanation:
Whenever you're converting a percentage into a decimal, you multiply the percentage by 100, or move the decimal point two points to the left. So, 7.5% as a decimal is 0.075.
which pare of numbers has a sum of 100 (this is her sis) (:
Answer:
50+50
25+25+25+25
20+20+20+20+20.
find the area of the kite please. image included!!!
Will give brainliest answer please help
Answer:
[tex]a^{2}(24a^{2}+36a+12)[/tex]
Step-by-step explanation:
Area of rectangle= Length*Width
so [tex](6a^{2}+9a+3)*4a^{2}[/tex] multiply each coefficient of a times 4a^2
[tex]24a^{4}+36a^{3}+12a^{2}[/tex] then take a^2 common factor so it will be
[tex]a^{2}(24a^{2}+36a+12)[/tex]=area
