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David
Questions (1,323)
Find the width of a recctangle that has a length of 48 cm a diagonal of 50 cm.
2 answers
387 views
(x-4)^2=12
1 answer
249 views
X^2-4x-24=0
1 answer
299 views
The perimeter of a rectangle is 82 yards. The length is two yards more than the width. Find the dimensions of the rectangle.
1 answer
477 views
Solve for x:
X-1/x = 3x/x-2
1 answer
327 views
Graph this equation: x=-3 PLZ show the steps of how you got it.
1 answer
533 views
Melissa and Emily leave by car from the same location traveling in opposite directions. Melissa leaves at 4:00 traveling at
1 answer
1,000 views
X^2 x+2=82, x^2+2x=82
1 answer
285 views
Write the equation of the line (in slop/intercept form) that has a slop of 7 and goes through the point (6,4).
1 answer
1,119 views
The perimeter of a rectangle is 82 yards. The length is two yards more than the width. Find the dimensions of the rectangle.
1 answer
436 views
Graph this equation :
X=-3 on a graph PLZ and show how you did it please
1 answer
358 views
Graph the following equation :
2x-3y=-6
2 answers
333 views
Solve
A collection of dimes and quarters is worth $7.65. There are 45 coins in all . How many of each are there?
1 answer
576 views
Graph the solution set on a number line :
3x+4>-8
1 answer
525 views
Solve using the quadratic formula
X^2-4x=21
1 answer
1,063 views
Solve 3x^2 -49=0
1 answer
919 views
Solve 3x^2-49=0
1 answer
536 views
Solve by completing the square : 2x^2= 9x+5
2 answers
423 views
Solve by completing the square: x^2+3x-28=0
3 answers
3,072 views
If the half-life of uranium-235 is 7.04 (times) 10 (to the eight power) 8 y and 12.5 g of uranium-235 remain after 2.82 (times)
1 answer
1,226 views
If the half-life of uranium-235 is 7.04 (times) 10 (to the eight power) 8 y and 12.5 g of uranium-235 remain after 2.82 (times)
0 answers
1,195 views
Carbon-14 has a half-life of 5730 y. How much of a 144 g sample of a carbon-14 will remain after 1.719 (times) 10 4y?
1 answer
892 views
Carbon-14 has a half-life of 5730 y. How much of a 144 g sample of a carbon-14 will remain after 1.719 (times) 10 4y?
0 answers
892 views
the work i got from my math teacher says
Determine the surface area of each right rectangular prism to the nearest square unit.
1 answer
433 views
In 2 minutes, a conveyor belt moves 300 pounds of recyclable aluminum from the delivery truck to a storage area. A smaller belt
4 answers
4,494 views
Three times the reciprocal of a number equals 9 times the reciprocal of 6. Find the number.
1 answer
1,760 views
Please, help me!
5/(x^2 - 4) + 2/(x^2 - 4x - 3) - 3/(x^2 - x - 6)
1 answer
242 views
Which is the 7th term in the sequence of the squares of all odd numbers starting from 1?
144 169 196 200 225
2 answers
728 views
6y + 5x = -15. Find three solutions of the equation
1 answer
300 views
The pressure in car tires is often measured in pounds per square inch (), with the recommended pressure being in the range of 25
0 answers
587 views
The pressure in car tires is often measured in pounds per square inch (), with the recommended pressure being in the range of 25
2 answers
897 views
3. Ohm’s law states that the current flowing in a circuit varies directly as the applied voltage and inversely as the
1 answer
999 views
A chemist has 30%, 40 % and 80 % acid solutions. All three were to be mixed to make 4.00 x 102 L of 38% acid solution but a
1 answer
499 views
A stone is thrown from the ground with initial velocity v0 directed at angle alpha with respect to the horizon. Find equations
1 answer
370 views
A gas mixture contains 0.60 mol of N2, 0.10 mol of H2, 0.20 mol of CH4. Calculate the pressure of the gas mixture and the
1 answer
868 views
The particles in the figure below (m1=1.6 kg and m2=3.5 kg) undergo an elastic collision in one dimension. Their velocities
0 answers
663 views
A railroad car (m=3000 kg) is coasting along a level track with an initial speed of 22 m/s. A load of coal is then dropped into
0 answers
701 views
explain how the e-business's online service fits within the e-marketing mix
3 answers
359 views
A pelican flying along a horizontal path drops
a fish from a height of 6.0 m. The fish travels 7.7 m horizontally before it
0 answers
794 views
Janet jumps off a high diving platform with
a horizontal velocity of 2.25 m/s and lands in the water 1.6 s later. How high is
2 answers
605 views
A mass m1 = 3.3 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 =
3 answers
11,666 views
Before going into orbit, an astronaut has a mass of 55 kg. When in orbit, a measurement determines that a force of 67.1 N causes
1 answer
1,245 views
The net external force on a golf cart is 398.2 N north.
If the cart has a total mass of 274.1 kg, what is the cart’s
1 answer
492 views
The net external force on the propeller of a 3.6 kg model airplane is 8.4 N forward.
What is the acceleration of the airplane?
1 answer
477 views
A ball is thrown from a point 1.38 m above the ground. The initial velocity is 19.9 m/s at an angle of 33.8° above the
1 answer
868 views
The director of an alumni association for a university wants to look at the relationship between the number of years since
9 answers
6,464 views
A ball is thrown from a point 1.38 m above the ground. The initial velocity is 19.9 m/s at an angle of 33.8° above the
0 answers
461 views
A person walks the path shown below. The total trip consists of four straight-line paths.
Path 1 is 40.0 m due east. Path 2 is
1 answer
5,049 views
a/(a+2)-1 = -(3a+2)/(a^2+4a+4)
1 answer
219 views
Identify 5 characteristics common to plants and describe them?
2 answers
253 views
when kevin started his car in the parking lot, he also turned on the radio to his favorite station,as he entered the street onto
1 answer
635 views
Alex spent 3/7 of his money. He gave 1/4 of the remainder to his sister. He had $120 left. How much money did he have in the
3 answers
972 views
an air traffic controller spots two planes at the same altitude flying towards one another. their flight paths form a right
1 answer
672 views
an air traffic controller spots two planes at the same altitude flying towards one another. their flight paths form a right
0 answers
1,073 views
what does -1 E-4 mean when you write it out?
1 answer
315 views
You are traveling on an airplane. The velocity of the plane with respect to the air is 110.0 m/s due east. The velocity of the
2 answers
1,347 views
Find the half-life (in hours) of a radioactive substance that is reduced by 10 percent in 5 hours.
1 answer
981 views
A red ball is thrown down with an initial speed of 1.0 m/s from a height of 27.0 meters above the ground. Then, 0.6 seconds
1 answer
2,259 views
A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly
3 answers
8,842 views
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates
2 answers
860 views
Type A nerve fibers in humans can conduct nerve impulses at speeds up to 139.8 m/s. How fast is this in mph?
This is a question
1 answer
645 views
Question 3
Investment analysts generally believe the interest rate on bonds is inversely related to the prime interest rate for
0 answers
990 views
This assignment requires you to use Excel. In question 1, you will use the charting features. In
questions 2 and 3, use the
1 answer
1,901 views
Joelle earns her regular pay of 7.50 per hour for up to 40 hours a week. for each hour over 40 hours of work in a week, joelle
5 answers
3,530 views
How long would it take a car engine, say 500 pounds of iron, to cool from 1,200 degrees F (exauhst manifold temp) to air ambient
1 answer
443 views
What is the source of the sun's energy?
1 answer
357 views
Finde the mean , variance , standard deviation
N-127, P=0.66
0 answers
846 views
Frank's cell phone package costs $20 per month and an additional $0.05 per text. Josie pays $15 per month and $0.10 per minute.
0 answers
588 views
What are some sources of energy that are available to heat the interiors of planets?
1 answer
925 views
2 WAYS TO DETERMINE THE INTERIOR ARE GRAVITY, AND SEISMOLOGY.
1 answer
776 views
How can we use Kepler's laws or Newton's laws to learn about these objects?
1 answer
439 views
How were the different objects in the solar system discovered? What are the properties of the ice giants?
1 answer
575 views
How do I take the partial derivative of P with respect to r of the following:
D �~ P = ‡”(t=1 to T)[t �~ (CF)_t/(1+r)^t ]
2 answers
436 views
5x-y=22 x+9y=32
1 answer
261 views
In Rutherford's scattering experiments, alpha particles (charge = +2e) were fired at a gold foil. Consider an alpha particle,
2 answers
1,702 views
How do I take the partial derivative of P with respect to r of the following:
D × P = ∑(t=1 to T)[t × (CF)_t/(1+r)^t ]
0 answers
413 views
As a graduation present, you want to gift your son a trip to Disney World. Presently beginning his second semester as a high
6 answers
574 views
I need help editing errors in parallelism in the following sentence: Is it true that Superman could leap tall buildings, run
2 answers
1,660 views
my classes start 5-29-`12, can I get a better idea of whats ahead of me(course description)or what it consist of. Thank you
1 answer
325 views
Hi, my teacher doesn't teach us too well and we have a few packets to hand in for tomorrow that I really don't understand much
2 answers
504 views
A rectangular pond is 10m longer than it is wide. A walk 2m wide surrounds the pond. Find the dimensions of the pond if the area
0 answers
526 views
A rectangualar playground is 4 meters longer than it is wide. If the length is increased by 5m, and the width decreased b y 1 m,
0 answers
568 views
How do i solve 2x+y > -3? And how do i graph it. This is Linear inequalities.
1 answer
465 views
Two numbers have thousandths other than zero. Could the difference of these numbers be 5.3? Explain.
3 answers
1,110 views
-4x+1-2(x-1)= -4(x-4)
2 answers
287 views
Calculate the weighted cost of equity for a firm with the following characteristics: (a) Last Dividend--$5.00, (b) Growth
0 answers
457 views
Help me to write these answer question, Write an essay that illustrate the saying every cloud has a silver lining in 340 words
1 answer
1,148 views
What is Fundamentalist-Modernist Controversy.?
Is this one whole topic or more than one.?
1 answer
467 views
log5 (x+2)+log5(x-2)=3
0 answers
387 views
Calculate the Concentration of Ni2+ in a soltion which prepared as mixing 50.0ml 0.0300 M Ni2+ and 50.0mlml 0.0500 M EDTA at pH=
0 answers
1,106 views
calculate the the pH of a buffer solution containing 0.246 M NH3 and 0.0954 M NH4Cl (for NH3 Kb = 1.74x 10-5)
1 answer
590 views
what mass of AgBr is formed when a solution containing 3.45 g of KBr is mixed with a solution containing 7.28 g AgNO3?
1 answer
792 views
How many grams of water are formed when 250 mL of 2.0 M Mg(OH)2 are neutralized by a solution of HCL ?
2 answers
532 views
How many mL of 3.0 M HCL are required to neutralize 250 mL of 2.0 M MgCL2 ?
1 answer
403 views
Explain why the absolute values of the standard enthalpy change in the reaction and heat measured by the calorimeter are not
0 answers
439 views
For the following reaction, the equilibrium constant Kc = 97.0 at 900K. If the initial concentrations of NH3 and H2S are both
1 answer
615 views
The equilibrium constant Kp for the following reaction is 4 atm^2 at 300 K.
AB(s) = A(g) + B(g) What is the equilibrium pressure
1 answer
532 views
Which of the following statements are incorrect?
1) Gases are not included in the equilibrium constant expression. 2) Equilibrium
2 answers
672 views
The equilibrium constant Kc for the following reaction is equal to 0.20 at 250°C. Calculate the equilibrium constant Kp for the
1 answer
664 views
A simple pendulum has a mass m and carries a charge q. The pendulum is suspended between the
vertical plates of a capacitor of
0 answers
634 views
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