Questions on Geometry: Geometric formulas answered by real tutors!

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Question 1059738: There are two congruent polynomial. ABCD is congruent to EFGH. Angle A is a right angle. Angle E equals y^2-10. Angle D equals 2y^2-132. What is angles D's measure?
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Question 1060786: Hi! I'm wondering how to solve for the orthocenter. Problem: Find the orthocenter of triangle JKL with vertices J(2,1), K(9,1), and L(4,6).
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Question 1061302: Marium 49 has a half-life of 23 years. Assuming Marium 49 decays according to y=Ce^kt find the decay (growth) constant for Marium 49.
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Question 1062675: Write the slope-intercept form of the equation of the line passing through the point (4,4) and perpendicular to the line y=4/3x-2.

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Question 1062676: Determine the coordinates of the midpoint of WX and find the approximate distance W eggs for the point W(-7,3) and X(-4,6).
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Question 1062978: What is the value of cos−1 ⁡(−√2/2) in Quadrant II?
cos−1⁡ (−√2/2)= __________°

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Question 1062978: What is the value of cos−1 ⁡(−√2/2) in Quadrant II?
cos−1⁡ (−√2/2)= __________°

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Question 1062978: What is the value of cos−1 ⁡(−√2/2) in Quadrant II?
cos−1⁡ (−√2/2)= __________°

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Question 1063063: Find the distance between (4, 7) and (2, 9).
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Question 1063159: Line passes through (3,-3) and perpendicular to y=1/2x+4
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Question 1063257: Find the surface area of a cylinder with a base diameter of
10 in and a height of
6 in. Write your answer in terms of
π, and be sure to include the correct unit.

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Question 1062973: A farmer hopes to yield 600 kg of corn after one harvest from a small plot of land. He knows that every square meter of land can yield 2 kg of harvested corn.
Is the farmer's 6 m by 18 m plot of land large enough to produce the 600 kg of corn he desires?
____A_____, the area needed to yield 600 kg of corn is ____B_____ square meters, and the plot of land is ____C_____ square meters.
Select three answers
A: No
C: 300
B: 300
B: 600
C: 288
C: 600
B: 288
A: Yes

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Question 1063619: P= 2(a+b), then b=
Click here to see answer by Cromlix(4381) About Me 

Question 1063626: A tractor of mass 5*10^3kg is used to Low a car of mass 2.5*10^3kg. The tractor moved with a speed of 3.0m/sec just before the towing rope becomes taut. Calculate speed of the tractor immediately the rope become taut.
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Question 1063721: What is the 10th term of this geometric sequence 1/3, 1, 3???
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Question 1064427: Which equations are written in slope-intercept form?

x= 4
y = mx+b
y = 1/2x+4
4/5(x−4)=(y+3)
3x−6y = 12
y = 2x
y = 5/2x−9

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Question 1064274: prove the following using coordinate geometry: The segments joining the midpoints of the sides of a rectangle form a rhombus
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Question 1064443: Hay!! I need help with my pre-algebra homework, I have tried everything and your my last hope, again, if you can help thank you SO much. :)
Problem: Given Triangle ABC ~ Triangle DEF, tell whether the given information is enough to find the specified measurements. Explain your thinking.
a.) You know AB, BC, CA and DE. You want to find EF and FD
b.) You know AB, BC and FD. You want to find CA.
a and b are both separate problems, again, thank you SO much!!!! :)

Click here to see answer by Theo(13342) About Me 

Question 1064529: Consider the line containing the points C(2,9) and D(−1,4).
A: What is the slope of the line?
B: What is the equation of the line in point-slope form?
Select one answer choice for question A, and select all correct answer choices for question B.
B: y−9=−5/3(x−2)
B: y−9=5//3(x−2)
B: y−4=35(x+1)
A: −3/5
A: 5/3
B: y+4=3/5(x−1)
B: y−4=5/3(x+1)
A: 3/5
B: y−9=5/3(x+2)
A: −5/3
B: y−9=3/5(x−2)
B: y+9=−3/5(x+2)

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Question 1064530: https://cds.flipswitch.com/tools/asset/media/608855
A: What is the slope of the line?
B: What is the equation of the line in point-slope form?
One answer choice for question A, and select all correct answer choices for question B.
A: 2
B: y−2=1/2(x−3)
B: y−2=2(x−3)
B: y−2=−1/2(x−3)
A: −2
B: y+6=1/2(x+1)
B: y+6=2(x+1)
A: −12
B: y+6=−2(x+1)
B: y+4=1/2(x)
B: y+4=2(x)
A: 1/2

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Question 1064528: A light bulb company produces a constant number of new light bulbs in their factory each week. The company stores the bulbs in a warehouse where old light bulbs from the previous year are also stored. After 2 weeks, the company has 5,000 bulbs in the warehouse. After 7 weeks, the company has 8,500 bulbs in the warehouse.

A: What is the constant rate of change in this problem?
B: Which equations correctly model the number of bulbs in the warehouse as a function of the number of weeks?
One answer choice for question A, and select all correct answer choices for question B.
B: y+8500=700(x+7)
A: 700 bulbs per week
B: y+5000=700(x+2)
B: y−8500=−700(x−7)
A: −700 weeks per bulb
B: y+5000=−700(x+2)
B: y−5000=−700(x−2)
A: 700 weeks per bulb
B: y−5000=700(x−2)
A: −700 bulbs per week
B: y+7=−700(x+8500)
B: y−8500=700(x−7)

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Question 1064714: Line AB↔ passes through the points A(3,−1) and B(1,7).
Which lines are parallel to AB↔?


y−1=2(x+2)
y=−4x+8
y−6=−4(x−3)
y+1=−4(x+1)
y=−4x
y=2x−3
y=4x+7
y=4x

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Question 1064713: The line AB↔ passes through the points A(−3,6) and B(5,−2).
Which equations could be for AB↔ in point-slope form?


y+2=x−5
y−6=x+3
y−2=−(x−1)
y=−x+3
y+2=−(x−5)
y−6=−4(x+3)
y+2=−4(x−5)
y−6=−(x+3)

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Question 1065973: Please can you rearrange the following to make u the subject of the formula
1/u + 1/v = 1/f
Many thanks.

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Question 1066442: What is the geometric mean of 2 and 25?
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Question 1066461: What is the geometric mean of 6 and 8?
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Question 1066786: For the GP,2+6+8 _ _ _ _ _ find (i) the 10th term.
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Question 1067154: P - the sun is shining
q - it is raining
r - the cat is inside

a - the sun is shining and the cat is inside.
b - if it is raining then the sun is not shining
c - if it is not raining the cat is not inside
any help would be greatly appreciated

Click here to see answer by ikleyn(52787) About Me 

Question 1067296: A circle is inacribed in a square of area 4 . What will be the area of the circle?
I do not know how to start this ..please help

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Question 1068823:
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Question 1069360: Mia takes a job with a starting salary of
$40,000 for the first year. She earns a 3%
increase each year. Write an equation for the
partial sum of the geometric sequence used to
model the situation and explain what an, n, Sn,
and r represent (use a_n to represent an).

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Question 1069379: The width of a rectangular computer screen is 2 inches more than its height.  If the area of the screen is 100 square inches, determine the dimensions of the computer screen
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Question 1069908: In Trapezium PQRS, the side PQ and SR are parallel. Angle RSP is 120 and RS=SP= 1/3 PQ. what is the size of angle PQR.
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Question 1070237: The line with equation 4x+5y=7 is a tangent to a circle of radius r. Find the radius r if the equation of the circle is given by x^2+y^2=r^2
Thank you so much! :)

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Question 1070833: The sum of two numbers is 26 and one number is five more than twice the other. Find the numbers.
Click here to see answer by josgarithmetic(39617) About Me 

Question 1073146: A tractor of mass 5*10^3kg is used to Low a car of mass 2.5*10^3kg. The tractor moved with a speed of 3.0m/sec just before the towing rope becomes taut. Calculate
(1) speed of the tractor immediately the rope become taut.
(2) loss in K. E of the system just after the car has started moving.
(3) impulse in the rope when it jerks the car into motion.

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Question 1073894: 5,15,45,135,405 what's the 10th value in the sequence
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Question 1074576: yoseph has 105 apples.he divides all apples evenly among 9 friends,including himself.what is the share of each?
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Question 1075024: the formula c = 2pir is used to calculate the circumference of a circle when given the radius. what is the formula for calculating the radius when given the circumference
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Question 1075041: The point P divides the interval joining points A(-1,7) and B(4,2) in the ratio K:L. Write down the co-ordinates of point P in terms of K,L. Hence, find the ratio in which the line y=2x+3 divides the interval joining A(-1,7) and B(4,2)
I figured out the first part of the question, but I'm not sure how to do the second part. Any help is appreciated!!

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Question 1075495: A minor arc AB of a circle, centre O and radius 10 cm, subtends an angle x at O. The major arc AB subtends an angle 5x at O. Find, in terms of π, the length of the minor arc AB.
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Question 1075910: Hello can you help me this questions?
1. Write the equation in the form ax +by+c=0
A. Y=2/8x-2
B. Y=-1/4x+1

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Question 1075915: I need your help please.
1. Write the equation in the form ax+by+c=0
A. Y=3x+1
B. 5/8x-2
C. 11/2x+4
2. Find the equation of the following lines in the form y=mx+c. Hence write down their gradient
A. 2x+3y+6=0
B. 3/4x+1/8+3=0
C. 2x-2y+5=0
D. 2/5x-1/10y-2=0
E. 4x-2y+3=0
F. X+y-4=0
Thank you

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Question 1075915: I need your help please.
1. Write the equation in the form ax+by+c=0
A. Y=3x+1
B. 5/8x-2
C. 11/2x+4
2. Find the equation of the following lines in the form y=mx+c. Hence write down their gradient
A. 2x+3y+6=0
B. 3/4x+1/8+3=0
C. 2x-2y+5=0
D. 2/5x-1/10y-2=0
E. 4x-2y+3=0
F. X+y-4=0
Thank you

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Question 1076883:
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