The diagram shows two right angled triangles, joined together along a common side.
Calculate the area of the triangle ACD.
you must show all your working.
(Pleaseee it’s really urgent!)
Answers
Answer:
AC² = 10.8²+14.4² = 324
AC = √324= 18
area = AC.DC÷2
area=18×24÷2
area=216
Answer:
216 centimeters squared
Step-by-step explanation:
working is above
Related Questions
Evaluate the expression when x= -2.
х2+бх+9
Answers
Answer:
1
Step-by-step explanation:
x = - 2
x^2 + 6x + 9
= ( - 2 )^2 + 6 ( - 2 ) + 9
= 4 - 12 + 9
= 4 + 9 - 12
= 13 - 12
= 1
Plsss help will give brainlest no links or files plss
Answers
Answer:
1: 62
2: 118
3: 62
4: 118
Step-by-step explanation:
1 and 3 are opposite angles so they have the same measure. 2 and 1 are adjacent angles on a linear plane. since a line is 180 degrees and we know that one of the angles on this plane is 62, that means that angle 2 must be 180 - 62 which 118 degrees
Lana expected 50 people to come to the picnic, but 60 people actually showed up.
Calculate the percent error.
Answers
Answer:
it is 10%
Step-by-step explanation:
60 - 50 = 10
An office building is 18 meters high. What
calculation would convert its height to
yards? Use 1 meters = 1.09 yards.
Answers
Answer:
19.62 yards
Step-by-step explanation:
18 x 1.09 = 19.62
Five friends built a marble tower. The marble tower had a curved track. The track was designed so that the marbles would move down the track in a circular path. The track ended on the floor. Each friend predicted how he or she thought the marble would move when it rolled off the end of the track onto the floor. This is what they said:
Answers
Answer:
The best answer is of Keira's.
Step-by-step explanation:
The full question is as follows :
Given - Each friend predicted how he or she thought the marble would move when it rolled off the end of the track onto the floor.
This is what they said:
Magda : '' I think it will roll in circles.''
Soledad : '' I think it will curve for a bit and then straighten out.''
Allen : '' I think it will roll out in one big curve.''
Keira : '' I think it will roll in a straight line,''
Rafael : '' I think it will zigzag for a little while.''
To find - Which friend do you most agree with ?
Proof -
The best answer is Keira's.
The marble having the track will travel in a straight line.
The behavior is true for all objects.
If no outside force act on an object, the object will travel in a straight line at a constant speed.
When the marble leaves the end of the track, it is no longer in contact with the walls of the track.
That is , the marble has no longer a center-pushing force.
According to Newton's First law, an object remains at rest or in uniform motion in a straight line unless acted upon by an external force.
Since, there is no longer a center-pushing force so the marble rolls off the end of the track in a straight line path across the floor.
Find area of this figure 3 ft 4 ft 5ft
Answers
Answer:
26.14
Step-by-step explanation:
For the triangles: 3*4=12
For the circle: 28.27/2=14.135
12+14.135=26.135
~26.14
100 points
(algebra one)
describe and correct the error in comparing the graphs
Answers
Answer:
The error made is that the graph of [tex]y=x^{2} +3[/tex] is a vertical translation up by 3, instead of down.
Step-by-step explanation:
Exponential functions, when they are graphed, use the function [tex]f(x)=a(x-h)^{2} +k[/tex].
In the equation, k expresses how much the graph shifts vertically. In this case, the function shifts vertically up by 3 from the parent function, [tex]y=x^{2}[/tex]. So, the translation is actually 3 units up compared to the graph of [tex]y=x^{2}[/tex].
Hope this helps and have an amazing day!! ❤
Represent the following sentence as an algebraic expression, where "a number" is the letter x. You do not need to simplify.
The sum of 7 and the cube of a number.
The sum of 7 and the cube of a number.
Answers
Answer:
Step-by-step explanation:
7 + x³ is the sum of 7 and the cube of a number x
50 POINTS PLEASE HELP
A normal work day for Carl is from 8:00 a.m. to 4:30 p.m. Carl wants to figure out the degree measure that the hour hand makes while he is at work. Carl believes that if he divides 360 by 12 and multiplies the result by 8.5 he will have the correct degrees the hour hand moves. Is Carl correct? If not, choose the appropriate explanation.
A
Yes, Carl is correct. The process he takes will give him the correct degrees the hour hand moves.
B
No, Carl is incorrect. He must take the number he ends up with and subtract it from 360.
C
No, Carl is incorrect. The hour hand will go around the clock 360 degrees.
D
No, Carl is incorrect. He must first multiply 360 by 12 and then divide by 8.5.
Answers
Answer:
The answer is B brainliest?
Step-by-step explanation:
The number of homeruns hit by each player on the Bobcats baseball team is listed below.
Which measure of center best describes the approximate number of homeruns hit by a typical Bobcat player?
12, 8, 4, 3, 3, 2, 2, 2, 0
Mode
Range
Median
Mean
Answers
Answer:
mean
Step-by-step explanation:
Jennifer has a collection of 1,600 coins. Of the coins, 40% are dated before 1940, 35% are dated from 1940 to 1980, and the rest are dated after 1980. How many coins in Jennifer’s collection are dated after 1980?
Answers
Answer:
Step-by-step explanation:
40% + 35 % = 80 % so 20% are dated after 1980
20% is .20 in decimal form
.20 (1600) = 320 coins dated after 1980
Suppose that only 2 percent of all people are geniuses. If an IQ test indicates that Albert is a genius, but the test is only accurate 90 percent of the time, then the probability that Albert really is a genius is roughly:
Answers
Answer:
P = 1,8 %
Step-by-step explanation:
From the whole population, only 2% are geniuses. But test results, are accurate 90 %. So the probability that Albert really is a genius is:
P = 0,02 * 0,9
P = 0,018 or P = 1,8 %
Plsss help me, ASAP, Thank you
Answers
Answer:
[tex]\frac{1}{16}[/tex] [tex]\frac{10}{9}[/tex]
Step-by-step explanation:
a reciprocal is a number that when multiplied by a given number gives 1 as product.
16 * x = 1
x = 1/16
9/10 * x = 1
x = 10/9
Same thing with 9/10. The reciprocal of 9/10 is 10/9
The measure of an angle is 89. Find the measure of its supplement
a. 91
b. 89
c. 90
d. 80
Answers
Answer:
A. 91
Step-by-step explanation:
Supplementary angles are 2 angles that when added together, equal 180 degrees. 91+89=180
Hope this helps. here are free cookies --->
Sequences and series!! Help please
Answers
So, its more like this:
Using the polar form, a complex number with modulus r and argument θ may be written
z = r(cos 0 + j sin θ)
It follows immediately from Euler’s relations that we can also write this complex number in
exponential form as :
z = [tex]re^{j0}[/tex]
When using this form you should ensure that all angles are measured in radians and not degrees.
The exponential form of a complex number is in widespread use in engineering and science. Since z = r(cosθ + isinθ) and since eiθ = cosθ + isinθ we therefore obtain another way in which to denote a complex number: z = reiθ, called the exponential form.
I'm leaning towards the answer choices A. and C.
But I'm sure it's A because of the two, C has an x. That's the only difference they have.
Here's another example,
Let z=x+iy, its exponential form comes from identifying it as the point (x,y) in the (Argand) plane. This basically amounts to writing it in what would be polar form in the real plane. Writing it as:
z =reiθ
. If you graph the point (x,y) and treat it as a vector its easy to see that r=|z| and θ=tan−1(yx).
For purely real numbers, they are already in exponential form since they are equal to their modulus and θ=0.
Also, you can write:
Re(z)=z+z¯2
if you want to write it purely in terms of z. Both of your numbers are purely real and thus they are already in exponential form. I suppose if you wanted to be strict about it you could write it as:
|1−z|=|1−z|e0i
which quadrant would contain the point -3, 3
please help!
thankyou!
Answers
Answer:
Quadrant 2
Step-by-step explanation:
(-3,3) when plotted on a graph fits into quadrant 2!
finding the slope to points
Answers
Answer: there’s no slope?
Step-by-step explanation: confused
Answer:ya where the slope at
Step-by-step explanation:
Help plz:)))I’ll mark u Brainliest
Answers
Answer:
4/5
Step-by-step explanation:
Given :
A right angled triangle with sides 24 , 3 and 40 .And we need to find the value of sinZ .
We know that , sine is the ratio of perpendicular and Hypotenuse. So that ,
[tex]:\implies[/tex] sinZ = p/h
[tex]:\implies[/tex] sin Z = 32/40
[tex]:\implies[/tex] sin Z = 4/5
Hence the renquired answer is 4/5.
If the trend shown in the graph continues, how many tickets will be sold after 10 hours? *
Captionless Image
A) 10 tickets
B) 15 tickets
C) 25 tickets
D) 50 tickets
Answers
If no one minds I need help!
Answers
Answer:
A and C
Step-by-step explanation:
Put the points on a graph and determine if they are perpendicular.
They are, in fact, perpendicular.
Can someone help me really please
Answers
Answer:
Step-by-step explanation:
question
Answer:
the tank at the pet store
Step-by-step explanation:
5x4x2 = 40
35<40
plzzzzzz help for a brianly
Answers
Answer:b
Step-by-step explanation:
A sporting goods store has shoes on sale for 20% off the regular price. Brantley finds a pair of shoes with a regular price of $35. He wants to know the sale price of the shoes. 0) Drag the given information into the table to represent the problem. Regular Price % $ Sale Price Discount % % S $ $35 $ ? 20%
Answers
Answer:
$28
Step-by-step explanation:
Given that :
Regular price = $35
Discount = 20%
Sale price = Regular price - Discount on sale
Discount on sale = 20% * regular price
Discount on sale = 0.2 * $35 = $7
Sale price = $35 - $7 = $28
Answer:
Regular price is 35 and discount is 20% and sale price is ?
Regular price is 35 and the discount is 7 and the sale price is 28
Step-by-step explanation:
I did the I-ready already
What is equavalent 3 11/40.
The best estimate close to this answer 3 11/40
A. 2 1/2
B. 3 Plzz help me
C. 3 1/2
D. 4
Answers
Answer:
C. 3 1/2Step-by-step explanation:
Estimate the fraction part of the number.
11/40 > 10/40 = 1/4We can estimate the fraction part as 1/2 since its greater than 1/4.
The number becomes 3 1/2.
Best choice is C
Answer:
11/40>10/40=1/4 is a part of ½
so
best estimate is 3 ½.
A coin collection consists of nickels, dimes and quarters, and has a total value of $3.30. There are three times as many nickels as quarters. How many coins of each kind are there if the numbers of dimes is three less than the average of the number of nickels and number of quarters
Answers
Answer:
18 nickels, 9 dimes, and 6 quarters.
Step-by-step explanation:
Answer:
18 nickels, 9 dimes, and 6 quarters
Step-by-step explanation:
PLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS HELP
Answers
Answer:
2.26
Step-by-step explanation:
The volume of a cylinder is equal to pi*r^2*h
3.14*r^2*25=400
r^2=5.09554140127
r~2.26
Answer:
Step-by-step explanation:
r= roughly 2.26
r= square root v/pi x height
The data are from a small moving company that moves people from urban apartment buildings to other urban apartment building in the same or different cities. The company needs assistance in predicting the labor hours for jobs so they can provide more accurate price quotes.
Run two separate regressions using the data in the sections of the spreadsheet titled Regression Model 1 and Regression Model 2. Use a 95% confidence level.
Fill in all the blanks below. Do not round any numbers except for when entering them in the blanks for this quiz, round these numbers to exactly 2 decimal places even if the number has only one or no decimal places. Use commas to separate thousands (e.g., 1225 should be entered as 1,225.00).
Regression Model 1
R Square expressed as a percentage rounded and carried out to two decimal places is ________% and Adjusted R Square expressed as a percentage rounded and carried out to two decimal places is _______%. Refer to the spreadsheet embedded in your Module 14 Regression document I provided you to see the calculation and format for answering this next question. The gap between R Square and Adjusted R Square expressed as a percentage rounded and carried out to two decimal places is 0.______%.
The overall regression model (was / was not) _______ significant.
Using square footage of 1,500 and mileage of 92, the model estimates that ______ hours of labor would be required, with a margin of error of _________ hours.
Regression Model 2
R Square expressed as a percentage rounded and carried out to two decimal places is _______% and Adjusted R Square expressed as a percentage rounded and carried out to two decimal places is _______%. Refer to the spreadsheet embedded in your Module 14 Regression document I provided you to see the calculation and format for answering this next question. The gap between R Square and Adjusted R Square expressed as a percentage rounded and carried out to two decimal places is 0.________%.
The overall regression model (was / was not) __________ significant.
Using square footage of 1,500, mileage of 92, and floors of 71, the model estimates that _________ hours of labor would be required, with a margin of error of ________ hours.
Model Selection
Because the R Square is (higher / lower) _________ in regression model 1 than in regression model 2 and the gap between R Square and Adjusted R Square is (smaller / larger) in regression model 1 than in regression model 2 _________ and the margin of error of the estimated labor hours is (smaller / larger) _________ in regression model 1 than in regression model 2 , we would characterize regression model (1 or 2) ___________ as being the better model.
Answers
Answer:
I wish I can read all the text
NO LINKS
Which equation is the equation of the least squares regression line that most closely matches the data set?
Answers
Answer:
y = 3.5X - 6921.2
Step-by-step explanation:
Given the data :
X :
1990
1992
1994
1996
1996
Y :
45
51
57
61
75
Using an online regression calculator ; the regression model obtained is : y = 3.5X - 6921.2
Where ; slope = 3.5 ; intercept = - 6921.2
2x + 12 = 18
I need to find the value of the variable and please show me how you got the answer
Answers
Answer:
x = 3
Step-by-step explanation:
2x + 12 = 18
The variable is "x" and to find the value of x we must get rid of everything on the left side of the equation.
We can easily do this by using inverse operations
To get rid of the 12, we subtract 12, because in the expression its adding and the inverse of addition is subtraction.
But remember whatever we do to one side we have to do to the other, so we subtract 12 from each side
12 - 12 cancels out
18 - 12 = 6
we now have 2x = 6
now we want to get rid of the 2
2x is the same as 2 times x which is multiplication
The inverse of multiplication is division, so to get rid of the 2 we divide each side by 2
2x / 2 = x
6 / 2 = 3
we're left with x = 3
HELP PLEASE!!
Explain the error in the following exercise;
then correct it.
Answers
Answer:
2/1x7/6=14/6=7/3
Step-by-step explanation:
Multiply the 2 by the 7 but Not the 6. So the second number is 14/6, not 14/12.
‘Then simplify 14/6 to 7/3