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Elisa

Questions (116)

A vertical radio mast is supported by wires attached to its top and to points on the level ground 9m from its base. If each wire
1. 0 answers
2. 173 views
The ratio of golf balls to tennis balls in the coach's bag is 20 to 5. If there are 100 golf balls in the bag, how many tennis
1. 5 answers
2. 3,240 views
Nelly spends 25% of her free time surfing the Internet. If she spends approximately 1 hour per day surfing the Internet, how
1. 2 answers
2. 1,116 views
Brent counted 10 red cards, 10 black cards, and 20 blue cards in a deck of cards. What is the ratio of red cards to the other
1. 4 answers
2. 1,923 views
How does an electric motor work, linking to the theory of electromagnetism?I have already identified a few laws: -Ohms
1. 0 answers
2. 399 views
Solve Quadratic Systemx^2+y^2=2 x^2-6y=10 Please show work!!!
1. 1 answer
2. 474 views
Personal Reflection: what attitudes, skills, and values, do you do as an individual, need to develop in order to implement a
1. 3 answers
2. 646 views
stuart daniels estimates that he will need 25,000 to set up a small business in 7 years. how much must Stuart invest now at
1. 1 answer
2. 1,419 views
28E − 7 = 0would I add 7 to the 0 then divide 28 by 7 but the answer don't check out
1. 1 answer
2. 369 views
Simplify the expression.(x − 3)(2x − 4) − (x + 2)(x − 6)=
1. 4 answers
2. 443 views
please simplify the expreesion:(2x − 1)(x^2 + 3x − 3)=
1. 1 answer
2. 309 views
Simplify the expression.5(x − 1) − 3(x^2 + 4x + 5)- 8(x+7)=
1. 1 answer
2. 354 views
please help me w/ this one:(x+6y-5z) - (x-2y+4z)=
1. 1 answer
2. 268 views
can you help me factor this one?x^2 + x - 20=?
1. 1 answer
2. 298 views
please factor this:x^2 + 9x +18=?
1. 1 answer
2. 338 views
please factor:x^2-6x-7
1. 1 answer
2. 293 views
please help simplify5(x-1) - 3(x^2 + 4x + 5) - 8(x + 7)
1. 1 answer
2. 299 views
A dress normally selling for $60 was on sale for $48. What was the percent discount?
1. 1 answer
2. 643 views
A box contains 4 quaters, 3 dimes, and 2 nickels. you draw out two coins and keep them both. What is the probability that both
1. 1 answer
2. 661 views
Is this reaction exothermic or endothermic? Fe(NO3)3+ NaSCN
1. 0 answers
2. 958 views
Acid spills are often neutralized with sodium carbonate. For exampleNa2CO3 (s) + H2SO4 (aq)  Na2SO4 (aq) + CO2 (g) + H2O (l)
1. 5 answers
2. 3,704 views
Megan factored the expression 72x^2-43x+6 as (9x-3)(8x-2). But when Jacob applied the FOIL principle and multiplied out
1. 1 answer
2. 657 views
The length of a rectangle is 2 meters more than its width. If the area is 63 square meters, what are the length and width?
1. 1 answer
2. 1,401 views
A 125-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The
1. 2 answers
2. 1,041 views
Use the “difference of squares” rule to factor the following expression: 100a^6-64b^8
1. 1 answer
2. 493 views
Megan factored the expression 72x^2-43x+6 as (9x-3)(8x-2). But when Jacob applied the FOIL principle and multiplied out
1. 1 answer
2. 686 views
Factor out the greatest common factor from the expression9a2b3 – 12a2b4 – 24a3b
1. 1 answer
2. 988 views
Factor out the greatest common factor from the expression 36x^3-30x^2
1. 1 answer
2. 894 views
Factor the expression 16x^2-72xy+81y^2 into a product of binomials.
1. 1 answer
2. 971 views
Factor the following expression completely:45x^3y – 80xy
1. 1 answer
2. 930 views
15t^2+7t=2
1. 3 answers
2. 366 views
Abby rows 10 km upstream and 10 km back in a total time of 3 hr. The speed of the river is 5km/h. Find Abby’s speed in still
1. 2 answers
2. 537 views
Solve by factoring:2a^2 − 3a = −5
1. 1 answer
2. 465 views
Andrew factored the expression -12x^3-28x^2-3x as -4x (3x^2-7x+9). But when Melissa applied the distributive law and multiplied
1. 1 answer
2. 693 views
The area of a rectangular athletic field is represented by the expression 25y^2-4z^2 square meters. Write an algebraic
1. 1 answer
2. 563 views
The area of a rectangular athletic field is represented by the expression 16y^7+32y^5+80y^3 square meters. Write an algebraic
1. 1 answer
2. 589 views
Factor by grouping, if possible, and check5x3 + 4x2 − 10x – 8
1. 1 answer
2. 455 views
Factor completely. If a polynomial is prime, state this9 + 8t^2 - 18t
1. 1 answer
2. 643 views
Factor completely. Remember to look first for a common factor. If a polynomial is prime, state this-4t^2 + 64
1. 1 answer
2. 602 views
A particle is moving so that its velocity, v(t) = t-64/t^2 for 2≤t≤6. find the total distance traveled by the particle.
1. 4 answers
2. 930 views
A particle is moving so that its velocity, v(t) = t-64/t^2 for 2≤t≤6. find the total distance traveled by the particle.
1. 0 answers
2. 467 views
A particle moves along the s-axis. Use the given information to find the position of the particle. v(t)=8t3 ;s(0) = 5.
1. 4 answers
2. 994 views
A particle moves along the s-axis. Use the given information to find the position of the particle. v(t) = 8t3;s(0) = 5.
1. 1 answer
2. 594 views
Suppose that the number of bacteria in a culture at time t is given byN = 4950 ( 28 + t*e ^(-t/24)) Find the LARGEST and
1. 1 answer
2. 1,420 views
Suppose that the number of bacteria in a culture at time t is given byN = 4950 ( 28 + t*e ^(-t/24)) Find the LARGEST and
1. 0 answers
2. 541 views
Suppose that the number of bacteria in a culture at time t is given byN = 4950 ( 28 + t*e ^(-t/24)) Find the LARGEST and
1. 0 answers
2. 637 views
The first side of a triangle is 8 meters longer than twice the second side. The third side is 3 times the second side. The
1. 2 answers
2. 1,117 views
Instead, he enjoyed looking for hours and hours... In this phrase is the word looking a noun, adjective,verb, or an adverb?
1. 1 answer
2. 421 views
Write the equation in standard form for the line that passes through (6, -1) and (10,-*)So far I have -8-1 is -9 and 10-6 is 4,
1. 2 answers
2. 1,093 views
Graph y-7 equals 9(x plus 6)So 9x plus 54 54 plus 7 is 61 So y equals 9x plus 61. is it correct?
1. 2 answers
2. 522 views
Write an equation in standard form for the line through (9, -2) and (13, -8)Do I solve this by doing y2-y1/x2-x1. That would
1. 1 answer
2. 500 views
Could you please show me how to do this.Write an equation of the vertical and horizontal lines that pass through the given point
1. 3 answers
2. 451 views
Graphthe equation y plus 6 equals 1/8(x-21/8x - 2/8 add 2/8 to 6, so 61 times 8/8 makes it 48/8 plus 2/8 is 50/8 mx plus c would
1. 1 answer
2. 569 views
Write an equation in point slope for for the line thatpasses through (4,5) and has a slope of 6I got -19. Is this correct?
1. 1 answer
2. 415 views
Write the equation passing through the points (-9, 6 ) and (1, -5). The worksheet has multiple choice, so I know y intercept is
1. 1 answer
2. 649 views
Write an equation that passes through the points (4, 3) and (2, -2)I have -2 -3 is -5 and 2-4 is -2 so y equals -5/2x plus b. I
1. 1 answer
2. 511 views
Write the equation for the line that passes through the point (6,7) and has a slope of 1/2. Give as a simplified fraction.Again,
1. 1 answer
2. 538 views
Write an equation of a line that passes through the points (-6,7) and has a slope of -4How do I do this? it would be y equals
1. 1 answer
2. 530 views
How come (2xy^2)^3 is equal to 8x^3 y-6? I thought that six exponent should be a five since you add them together. So 2 and 3
1. 1 answer
2. 414 views
Hi! I have a questionHeres the problem: 3-2[6-(4y-1)] I got -8y-11 but it wasn't right and I don't know what i did wrong help
1. 4 answers
2. 503 views
A stone is thrown downward into a well with an initial speed of 5.00 m/s. The sound of splash is heard 1.50 s later. Find the
1. 1 answer
2. 547 views
A uniform string fixed at one end passes over a pulley and then is attached to a hanging object. The string is horizontal
1. 1 answer
2. 820 views
A bat flying at 6.00 m/s emits a chirp at 40.0 kHz. If this sound pulse is reflected by an insect moving away from the bat at
1. 1 answer
2. 1,365 views
A simple pendulum with a length of 1.50 m is suspended from the ceiling of a train. What is the period of simple harmonic motion
1. 1 answer
2. 807 views
A bat flying at 5.0 m/s emits a chirp at 35 kHz. If this sound pulse is reflected by a wall, what is the frequency of the echo
1. 2 answers
2. 1,792 views
A simple pendulum is 9.00 m long.(a) What is the period of simple harmonic motion for this pendulum if it is hanging in an
1. 1 answer
2. 1,293 views
Please help. I got 338.82 for the velocity and wanted to get the distance, but I can't seem to do it because I don't have the
1. 6 answers
2. 713 views
drwls for the question below, the answer seems to be wrong:The four tires of an automobile are inflated to a gauge pressure of
1. 1 answer
2. 616 views
Can't get correct answerAn object weighing 340 N in air is immersed in water after being tied to a string connected to a
1. 1 answer
2. 1,171 views
Determine the elongation of the rod in if it is under a tension of 5.7E10^3 N.The rod is made of aluminum and copper. From the
1. 3 answers
2. 3,459 views
Determine the elongation of the rod in if it is under a tension of 5.7E10^3 N.The rod is made of aluminum and copper. From the
1. 2 answers
2. 1,469 views
The four tires of an automobile are inflated to a gauge pressure of 1.8E10^5 Pa. Each tire has an area of 0.025 m2 in contact
1. 1 answer
2. 934 views
The four tires of an automobile are inflated to a gauge pressure of 1.8 multiplied by 105 Pa. Each tire has an area of 0.025 m2
1. 1 answer
2. 868 views
A 175 kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope
1. 3 answers
2. 1,832 views
What would the two half reactions look like forSr(s) reacting with excess 1M H4NHCO3. I really do not understand. It says that a
1. 1 answer
2. 415 views
1. It has been suggested that rotating cylinders about 11 mi long and 5.2 mi in diameter be placed in space and used as
1. 1 answer
2. 620 views
1. It has been suggested that rotating cylinders about 11 mi long and 5.2 mi in diameter be placed in space and used as
1. 1 answer
2. 1,168 views
In a popular amusement park ride, a rotating cylinder of radius 4.00 m is set in rotation at an angular speed of 5.00 rad/s. The
1. 1 answer
2. 2,735 views
The force shown in the force-time diagram in Figure P6.11 acts on a 1.4 kg object.(a) Find the impulse of the force. (b) Find
1. 1 answer
2. 5,975 views
D-Glucose, C6H12O6, is an aldohexose sugar which occurs commonly in nature. In a text or reference book look up "-D-(+)-Glucose
1. 1 answer
2. 544 views
A ball of mass 0.120 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.600 m.
1. 3 answers
2. 2,432 views
An archer shoots an arrow toward a 300 g target that is sliding in her direction at a speed of 2.35 m/s on a smooth, slippery
1. 1 answer
2. 710 views
1. A 10.0 g object moving to the right at 25.0 cm/s makes an elastic head-on collision with a 15.0 g object moving in the
1. 2 answers
2. 2,153 views
A 45.0 kg girl is standing on a 163 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat,
1. 1 answer
2. 4,574 views
Calculate the magnitude of the linear momentum for the following cases.(a) a proton with mass 1.67 10-27 kg, moving with a speed
1. 2 answers
2. 3,759 views
1. A centrifuge in a medical laboratory rotates at an angular speed of 3650 rev/min. When switched off, it rotates through 50.0
1. 1 answer
2. 1,828 views
An archer shoots an arrow toward a 300 g target that is sliding in her direction at a speed of 2.35 m/s on a smooth, slippery
1. 1 answer
2. 666 views
1. A 3.25 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0° with the surface. It bounces off with the
1. 2 answers
2. 866 views
A rotating wheel requires 5.00 s to rotate 30.0 revolutions. Its angular velocity at the end of the 5.00 s interval is 100.0
1. 1 answer
2. 1,263 views
An 8.00 g bullet is fired into a 180 g block that is initially at rest at the edge of a table of 1.00 m height. The bullet
1. 2 answers
2. 815 views
A 705 N man stands in the middle of a frozen pond of radius 4.0 m. He is unable to get to the other side because of a lack of
1. 1 answer
2. 1,007 views
The force shown in the figure below is the net eastward force acting on a ball. The force starts rising at t=0.012 s, falls back
1. 1 answer
2. 1,066 views
The force sensor measures the force on the sensor due to the bumper, but the cart's momentum change arises from the force on the
1. 0 answers
2. 1,232 views
A bat hits a moving baseball. If the bat delivers a net eastward impulse of 0.7 N-s and the ball starts with an initial
1. 1 answer
2. 1,046 views
Find the tension in the two wires that support the 100 N light fixture. Assume θ is 39°.left wire: right wire:
1. 1 answer
2. 2,193 views
The force exerted by the wind on the sails of a sailboat is 310 N north. The water exerts a force of 240 N east. If the boat
1. 3 answers
2. 797 views
A 4.0 g bullet leaves the muzzle of a rifle with a speed of 310 m/s. What force (assumed constant) is exerted on the bullet
1. 9 answers
2. 1,140 views
A 3.6 kg mass hangs at one end of a rope that is attached to a support on a railroad car. When the car accelerates to the right,
1. 2 answers
2. 2,172 views
Two blocks are fastened to the ceiling of an elevator as in Figure P4.19. The elevator accelerates upward at 2.00 m/s2. The
1. 1 answer
2. 7,915 views
Two packing crates of masses m1 = 10.0 kg and m2 = 3.50 kg are connected by a light string that passes over a frictionless
1. 4 answers
2. 5,305 views

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