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Jack
Questions and answers by visitors named
Jack
, page 4
Questions (1,125)
Given the initial augmented matrix
-1 1 2 0 2 -1 -3 0 2 -2 -4 0 find the RREF
1 answer
490 views
A value of the number m for which there is either no solution or an infinite number of solutions (u,w) to the system of
1 answer
380 views
x^2 + y^2 - 8x -2y -3 = 0
the points S and T lie on the circumference of the circle. M is the midpoint of the chord ST. Length of
2 answers
527 views
1.I have often (dream) of becoming a great writer.
2.I (drink) two glasses of orange juice at breakfast today. 3.Their new boat
6 answers
482 views
1.We (see) tropical fish in the warm waters surrounding the island.
2.Have you (speak) to your parents about the field trip?
1 answer
344 views
Using the correct form of (eat, ate, sit, set)
1.Someone (eat) all the leftover sandwiches. 2.Thank you, but I have already (ate,
4 answers
437 views
1.Weren't you ______ to help me wash the dishes? (suppose)
I have use correct form of suppose. Would it be suppose?
3 answers
622 views
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state
1 answer
452 views
To buy both a new car and a new house, Tina sought two loans totalling $260,394. The simple interest rate on the first loan was
2 answers
598 views
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state
2 answers
509 views
How many different points of intersection are there for x + y = 7 and y = x squared minus 7?
2 answers
1,101 views
Was there any magnetic pulling during the Mesozoic Era?
1 answer
308 views
When 2.6 ×103 g of CaCO3 are heated, the
actual yield of CaO is 1.06 ×103 g. What is the percent yield? Answer in units of %.
2 answers
782 views
Quicklime (CaO) can be prepared by roasting
limestone (CaCO3) according to the reaction CaCO3(s) � −!CaO(s) + CO2(g) . When 2.6
4 answers
1,645 views
A 5 digit positive integer is a "mountain number" if the first 3 digits are in ascending order and the last 3 digits are in
1 answer
504 views
what is the positive difference in the sums of the letters in the words MATH and COUNTS, if each letter is assigned a value as
3 answers
400 views
How would you set up the following unifor motion problem...
How long will it take the plane to fly 1000 km (i mile=1.61 km) if it
1 answer
287 views
How would you set up the following unifor motion problem...
How long will it take the plane to fly 1000 km (i mile=1.61 km) if it
1 answer
336 views
Two charges are located along the x-axis. One
has a charge of 6.2 µC, and the second has a charge of −3.1 µC. The Coulomb
1 answer
951 views
For how many two-digit prime numbers is the sum of its digits 8?
7 answers
3,313 views
an object that is 6 cm in height is put 9 cm from a convex lens. The lens has a focal length of 8 cm. What is the size of the
1 answer
406 views
The drawing bellow(click go to address img291.imageshack.us/i/sc017942e5.jpg/ to see picture of image) shows two students
3 answers
504 views
What is the importance of the Michelson-Morley experiment?
1 answer
338 views
which job titles are consistent only with the java language?
1 answer
368 views
Could somebody tell me in simple terms why equating coefficients works in partial fraction decomposition?
Like a simplified proof
1 answer
371 views
4x+2y-3z=7 2x+4y+z=35 6x+2y-2z=20 solve the system
3 answers
802 views
Find
[4(cos115+isin115)]^6
4 answers
435 views
A roller coaster moves 85m at 35 degrees S of W, and then travels 30 m at 45 degrees W of N. What is its displacement from its
1 answer
319 views
A company produces cardboard boxes with the top, bottom and sides measuring 5 feet. It costs the company 4 cents a square foot
2 answers
516 views
A surveyor records the polar coordinates of the location of a landmark as (40, 62°). What are the rectangular coordinates?
4 answers
1,531 views
Find the distance between P1(3, –195°) and P2(–4, –94°) on the polar plane. Round your answer to the nearest thousandth.
3 answers
956 views
place decimal points in 190563 and 865 so that their difference is 181.913
1 answer
287 views
how do you calculate density of a substance with a mass of 100g and a volume of 48ml
3 answers
473 views
Convert 25 meters to centimeters and gigameters.
1 answer
388 views
Convert 25 meters to centimeters and gigameters.
1 answer
355 views
Convert 25 meters to centimeters and gigameters.
1 answer
373 views
A compact disc spins at 2.3 revolutions per second. An ant is walking on the CD and finds that it just begins to slide off the
1 answer
449 views
A particle travels to the right at a constant rate of 6.8 m/s. It suddenly is given a vertical acceleration of 1.8 m/s2 for 5 s.
1 answer
982 views
Consider the following unbalanced reaction:
Fe2O3 (s) + CO (g) --> Fe (s) + CO2 (g) How many moles of carbon dioxide are produced
2 answers
770 views
1. Molarity is to moles of solute over liters of solution as molality
is to A. molar concentration over molal concentration. B.
2 answers
553 views
Please explain me which solution reacts faster to breakdown the materials the 25% or 10% HCL?
3 answers
675 views
1. Molarity is to moles of solute over liters of solution as molality
is to A. molar concentration over molal concentration. B.
2 answers
929 views
what is the sequence for fibbinachi higher than 1,000,000?
1 answer
277 views
is 0 a multiple of every number?
3 answers
265 views
If f(x)=[x−1/(1+5 x)], there are two points on the graph of
y=f(x) at which the tangent lines are parallel to the line
3 answers
435 views
I Don't Know What Is This Subject Called In English But It's About Complex Numbers
it says 25 = 16 - 9 i^2 = (4 ± 3i) But My
2 answers
497 views
A trough is 16 ft long and its ends have the shape of isosceles triangles that are 5 ft across at the top and have a height of 1
3 answers
1,378 views
equation of tangent line of the function sqrt (3x+5) where x=10
4 answers
449 views
A computer game starts with a set of 144 tiles separated into 36 equal groups.Sara played the game until there were 8 groups of
4 answers
841 views
A computer game starts with a set of 144 tiles separated into 36 equal groups.Sara played the game until there were 8 groups of
4 answers
402 views
Colossus of Rhodes:
Was the structure effective for its' stated purpose?
2 answers
503 views
The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2006 the Earth took
4 answers
2,782 views
Could you please explain to me:
how was the structure (Collosus of Rhodes) effective for it's stated purpose? I don't understand
4 answers
1,222 views
Once a 15 kg crate is in motion on a horizontal floor, a horizontal force of 51 N keeps the crate moving with a constant
7 answers
6,496 views
Ethanol (C2H5OH) is synthesized for industrial use by the following reaction, carried out at very high pressure.
C2H4(g) + H2O(g)
2 answers
1,163 views
Suppose $1.00 amounts to 1.082431 at 8 % compounded quarterly. How much does
$200 amount to? (a) $ 126.82 (b) $ 101.46 (c) $
1 answer
342 views
Find the x-intecepts, for the graph of the equation:
y=x^2+4x-5
1 answer
341 views
The hero pursues the villain up to the top of a bungee jumping apparatus. The villain appears trapped but to create a diversion
2 answers
586 views
x^3+a^3
Factor= (x-a) what is the remaninder when you divide x^3+a^3 by (x-a)? Please show me your working out
1 answer
356 views
Find the equation of the diameter of the circle x^2+y^2-6x+2y=15, which, when produced, passes through the point (8,-2).
4 answers
423 views
A court has ordered Security Enterprises to pay 200000 in two years and 500000 in five years. In order to meet this important
3 answers
1,042 views
Determine the units of viscosity,m, in the following equation:
t=m(du/dy), where t is a shear stress, u a velocity, and y is a
5 answers
493 views
How do you solve 2(15a-3)=10a-46
1 answer
351 views
Evaluate the given indefinite integrals.
∫ (x+2)(2x+3)^1/2
1 answer
408 views
The sum of two numbers is 10.The sum of their squares is 52.Find the numbers.
4 answers
4,880 views
The rate at which iPads are sold is R(t)=1000000x2.8^t where the units of R(t) are millions/year and represents time in years
1 answer
453 views
Find the relative extrema of f(x)= x/ln(x)
1 answer
418 views
Find integral of (x^3-6x-20)/(x+5) dx
1 answer
493 views
Integrate from e^2 to e of tthis funtion: 1/(x)ln(x) dx
1 answer
348 views
Find the inflection points of f(x)=(x^2-6x-5)e^x
1 answer
331 views
Find dy/dx for (e^xy)+ x^2 +y^2=10
1 answer
304 views
Can someone explain to me how to solve complex fractions as if I didn't know anything about Algebra? I really need the help,
3 answers
1,061 views
2^(3x+1)=2^)2/x) I don't know what to do here to get both of the xs
1 answer
305 views
If the coefficient of kinetic friction between tires and dry pavement is 0.800, what is the shortest distance in which an
2 answers
740 views
4. A,B and C are points on a horizontal plane.
A is 75 m from C on a bearing of 210 degrees and the bearing of B from C is 120
1 answer
820 views
Consider a random sample of 37 students, and consider the number who graduate in six years. . Find the probability that 20
1 answer
442 views
Explain what does Robert.e.Lee says to his son in letter.
1 answer
336 views
Explain what does Robert.e.Lee says to his son in letter.
1 answer
351 views
A sandpit in the shape of a rectangular prism has length 7 feet, width 5 feet, and height 1.75 feet. It is filled to the brim
2 answers
1,077 views
Any practice online for ACT, PSAE or sample questions.Please
To much stress.
3 answers
394 views
Service time, T, at an auto center has a Weibull distribution with parameters θ=3.7 and β=1.35. What is the probability that
2 answers
558 views
FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths
3 answers
429 views
ln(8x+3)=ln11
1 answer
286 views
How much volume(mL)of 2.50 M NaOH(aq)must be added to 25.0 mL of water to produce a 1.50 M NaOH solution?
Thanks!
1 answer
370 views
what is g(f(x))? and f(g(x))?
if f(x)=(1)/(sqaure root3x) and g(x)=x^2-5 Thanks!
2 answers
869 views
The manager of a large apartment complex knows from experience that 90 units will be occupied if the rent is 360 dollars per
2 answers
1,065 views
Through a mix up on the production line, 5 defective light bulbs were shipped out with 32 good ones. If 4 are selected at
1 answer
458 views
describe the difference between the poor and wealthy citizens of Rome.
1 answer
369 views
describe the difference between the poor and wealthy citizens of rome.
4 answers
562 views
I am given the graph of y=f(x) and I am asked to sketch the graph of y=-2f(-x). How do I move and/or rotate the given graph?
1 answer
419 views
Focus of the ellipse
9x^2+2y^2=36
1 answer
286 views
how many solutions are there to
csc^2x=25 (0≤x<2π)
3 answers
990 views
simplify cot(x+π)
1 answer
316 views
Could you please check these sentences?
Thank you,Writeacher. 1) In the first part if the novel she writes letters to her parents
1 answer
368 views
Can you please have a look at these sentences, please?
1) This information about the Augustan Age was not asked for in your test.
1 answer
448 views
Could you please help me express the following evaluations? Thank you.
1) You wrote exactly what I included on the photocopy
2 answers
680 views
I urgenlty need you to check these sentences, please.Thank you.
1) A job seeker should make a short list of the job's
1 answer
632 views
I left out these sentences. I hope you can have a look at them,too.
Can you tell me if the modals are possible, Writeacher? 1)
1 answer
829 views
Could you please check these sentences, Writeacher? Thank you.
1) A job seeker should make a short list of the job's requirements
2 answers
584 views
Writeacher,could you please check if all these sentences are possible?
1) I’m sure he didn’t rob the bank. He can't have
1 answer
374 views
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