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Andrea

Questions (771)

Verify that each of the following is an identity.tan^2x-sin^2x=tan^2xsin^2x I can get it down to cos^2 on the right, but cannot
1. 1 answer
2. 866 views
Hi. Can someone help me with this?Simplify: (sin^2x)(cos^2x)+(sin^4x) The answer is sin^2x, but I have no idea how to get there!
1. 3 answers
2. 447 views
Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of
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2. 2,750 views
Find the value of tan(1/2sin^-1 15/17)and sin[pi/2-cos(1/2)] Thanks.
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2. 985 views
how would you factor 4x-x^2-3/ x-1...so that x-1 would cancel out?could you explain step by step..plz
1. 3 answers
2. 409 views
A string of mass m=.1kg is stretched to where its length is L=20m. What is the tension force applied to the string if it takes a
1. 1 answer
2. 639 views
Find the instantaneous velocity of a pendulum at the instant when its bob is at the height equal to half of its maximum height
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2. 521 views
A swing is 2m long. how often do you need to push it to increase its swing's amplitude the most?L=2m When amplitude is the most
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2. 424 views
A mass m=.5kg on a spring with a spring constant. It is displaced by the distance x_max =20cm (.2m) from equilibrium on a
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2. 502 views
Find the instantaneous velocity of a mass on a spring oscillating on a horizontal frictionless surface at the instant when its
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2. 713 views
Which type of dilation is determined by a scale factor of 10?enlargement reduction congruence transformation none of these
1. 0 answers
2. 738 views
how would you solve for x? can you explain step by step?40 = [(x+2.8)/2]*8.5
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2. 395 views
how would you solve for x in this equation?40.0 = 0+ (x + 2.8)/2multiplied by(8.50)
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2. 320 views
Why did Germany invade Poland in 1941?=]
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2. 553 views
Why did Japan invade China in 1937?thank you so much =]
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2. 583 views
Why did Japan invade China in 1937?thank you so much =]
1. 2 answers
2. 624 views
Describe what can happen to the three-carbon molecules made in the Calvin cycle.
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2. 551 views
A box of mass 1kg is placed on a table and is connected to a hanging mass m by a string strung over a pulley. If the coefficient
1. 0 answers
2. 485 views
You have just discovered a planetary system consisting of a star (Dagobahr) and its two planets: Rool and Krau. Planet Rool has
1. 2 answers
2. 486 views
A box of mass 1kg is placed on a table and is connected to a hanging mass m by a string strung over a pulley. If the coefficient
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2. 815 views
A box of mass 1kg is placed on a table and is connected to a hanging mass m by a string strung over a pulley. If the coefficient
1. 0 answers
2. 545 views
complete the statement: in recoila)the initial momentum is zero b)the object sticks together after collision c)the total kinetic
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2. 416 views
a rock is thrown straight up which of the following statemetns concerning the net force acting on the rock at the top of the
1. 1 answer
2. 1,492 views
two objects collide when sliding on a fricitonless horizontal surface. Which quantity is conserved during their collision?a)
1. 1 answer
2. 710 views
a rock suspended from a string moves downwards at constant a=g. Which of the following is true concerning the tension in the
1. 1 answer
2. 712 views
Complete the following statement: The term net force most accurately describes:a) quantity that causes displacement b) quantity
1. 3 answers
2. 6,192 views
Europa, a moon of Jupiter has an orbital diameter of 1.34x10^9m and a period of 3.55 days. What is the mass of Jupiter?d=1.34x10
1. 1 answer
2. 5,321 views
The mean radius of the Earth is R=6.38x10^6m. At what distance above the Earth's surface will the acceleration of gravity be
1. 0 answers
2. 777 views
A 2.1kg brass ball is transported to the Moon.a)What is the mass of the brass ball on the earth and on the moon? Wouldn't it be
1. 1 answer
2. 4,271 views
"the total angular momentum of an object changes when a net external force acts on the system." This statement is:a)always true
1. 1 answer
2. 1,382 views
A lever is 5m long. The distance from fulcrum to the weight to be lifted is 1m. If the worker pushes on the opposite end with
1. 2 answers
2. 3,729 views
Is the answer to this 4?If the filament resistance in an automobile headlamp is 3 ohms, how many amps does it draw when
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2. 924 views
Consider a roller coster car moving along a track from point A to point B to point C. a)if the roller coaster car starts from
1. 1 answer
2. 874 views
If the net work done on an object is positive then the object's energy is ...?The object's energy would also increase since W=
1. 1 answer
2. 880 views
Compared to yesterday you did 3 times the work in one third the time. To so so your power output must have been:a) the same as
1. 1 answer
2. 3,612 views
A force of 20 N is applied horizontally to a 1 kg mass on a level surface. The coefficient of friction is .2. if the mass is
1. 1 answer
2. 767 views
A 1000kg car accelerates from 0 to 25m/s in 8s. What is the average power delivered by the engine? (1hp=746W)P=W/t p=Fd/t P=Fv
1. 1 answer
2. 658 views
A ball falls from the top of a building . through the air(air resistance is present) to the ground below. How does the KE just
1. 1 answer
2. 1,375 views
What work is required to stretch a spring of spring constant 500N/m from x1=.2m to x2=.25m? Assume the unstreched position is at
1. 1 answer
2. 1,194 views
If your last electric bill for sept. was $105. If the average price is 6.5 cents per kw, how many kw did your household use in
1. 2 answers
2. 860 views
A 15 N force is needed to move an object with constant velocity of 5 m/s. What power must be delivered to the object by the
1. 1 answer
2. 1,633 views
A wooden block is moving on a rough level surface. It originally has 25J of kinetic energy. If the friction force acting on it
1. 1 answer
2. 485 views
A 50kg skier pushes off the top of a hill with an initial speed of 5m/s. Neglect friction. How fast will he be moving after
1. 0 answers
2. 551 views
A 50kg skier starts from rest from the top of a 100m slope. What is the speed of the skier on reaching the bottom of the slope?
1. 1 answer
2. 2,840 views
In An American Childhood how does Annie Dillard reference life or death through the waterfall scene on page 150
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2. 435 views
Line L contains the points given in the table below. If the slope of line m is 1/3 the slope of line L what are three points
1. 0 answers
2. 369 views
: if the quotient 3m^2 +15m / m^2 divided by 30/ m^2 + 5m is simplified to lowest terms, which of the following is the
1. 1 answer
2. 794 views
Given the following neutralization raction: HCO3^- + OH^- <=> CO2[over]3^- + H2Oa. label the conjugate acid-base pairs in this
1. 1 answer
2. 989 views
Okay, so apparently ASA and FeCl3 form a violet complex and FeCl3 forms with phenol groups to make purple. Looking at the
1. 0 answers
2. 684 views
A student accelerates from rest at a rate of 3 miles/min^2. How far will the car have traveled at the moment it reaches a
1. 0 answers
2. 728 views
What are some modern examples of cultural blending in art? Consider music, literature, painting etc..I can't find any info for
1. 1 answer
2. 921 views
I am putting < for the square root abbreviation. I don't know how to use it on my comp.3<99-2<44-6<11=? For Further Reading On a
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2. 664 views
I am putting < for the square root abbreviation. I don't know how to use it on my comp.3<99-2<44-6<11=? On a graphing
1. 0 answers
2. 511 views
A store gives a staff discount of one fifth. How much would a member of staff pay for:a) a camera with a retail price of £215?
1. 0 answers
2. 476 views
square root sign 2x+3 - square root sign x-2 =2In my head, I worked it as x=3. I did that because only sqr roots that are
1. 0 answers
2. 526 views
Count Iblis how do you simplify 3square root sign with this underneath (3x squared y) to the third power?"3 square root sign"
1. 0 answers
2. 647 views
Count Iblis what is the answer to 2 square root sign 18x? The instructions say to simplify or reduce.2*(18x)<sup>1/2</sup>=
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2. 537 views
Another problem plz help Count Iblis. How do you solve 5/x+2 + 2x/x squared - 4= 3/x-2?5/x+2 + 2x/x squared - 4= 3/x-2 You write
1. 0 answers
2. 620 views
Simplify 2i to the 5th power?(2i)^5 = 2^5 * i^4 * i = 32 (-1)^2 * i = 32 i
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2. 456 views
what is the answer to 2i to the 5th power?i^2 = -1 --> i^4 = 1 ---> i^5 = i (2i)^5 = 32 i thanks for the info!
1. 0 answers
2. 496 views
can you simplify 12x squared y cubed?
1. 0 answers
2. 392 views
what is the answer to 2 square root of 18x?<b>Do you mean 2*(18x)<sup>1/2</sup>? What does it equal. What are we to do with the
1. 0 answers
2. 587 views
what is the answer to 12x squared y cubed /2xy squared +6xy * y squared +6y+9 /3y cubed +9y squared?You have not written an
1. 0 answers
2. 796 views
how do you foil 12x squared y cubed?
1. 0 answers
2. 357 views
okay, so what exactly is a story board?I used to assign these. Here were the directions: 1. Divide a page into six sections
1. 0 answers
2. 566 views
What was the reason for the downfall of the Han Dynasty and The Roman Empire?Was is partially invasion from barbarians? Han
1. 0 answers
2. 755 views
Year Cash Flow(A) Cash Flow (B)0 -307,206 -27,651 1 14,950 8,726 2 32,391 13,901 3 29,232 9,222 4 390,590 13,140 15% rate of
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2. 495 views
I'm having some troubles with these. Thanks in advance.If a>0 find the minimum value. If a<0 find the maximum value. 1.
1. 0 answers
2. 686 views
At a construction site, a brick fell and hit the ground at 24m/sa) from what height did the brick fall? b) how long was it
1. 0 answers
2. 515 views
Can someone please help me with an algebra problem?-|4-8b|=12 I really get confused with the absolute value symbols and a
1. 1 answer
2. 1,609 views
What is the difference between a bay and a penninsula?A bay is a body of water -- smaller than a sea or ocean or gulf -- that is
1. 0 answers
2. 696 views

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