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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. 193 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. 3,255 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. 1,138 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. 1,949 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. 406 views
Solve Quadratic Systemx^2+y^2=2 x^2-6y=10 Please show work!!!
1. 1 answer
2. 479 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. 656 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. 1,431 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. 375 views
Simplify the expression.(x − 3)(2x − 4) − (x + 2)(x − 6)=
1. 4 answers
2. 451 views
please simplify the expreesion:(2x − 1)(x^2 + 3x − 3)=
1. 1 answer
2. 317 views
Simplify the expression.5(x − 1) − 3(x^2 + 4x + 5)- 8(x+7)=
1. 1 answer
2. 361 views
please help me w/ this one:(x+6y-5z) - (x-2y+4z)=
1. 1 answer
2. 276 views
can you help me factor this one?x^2 + x - 20=?
1. 1 answer
2. 310 views
please factor this:x^2 + 9x +18=?
1. 1 answer
2. 348 views
please factor:x^2-6x-7
1. 1 answer
2. 300 views
please help simplify5(x-1) - 3(x^2 + 4x + 5) - 8(x + 7)
1. 1 answer
2. 306 views
A dress normally selling for $60 was on sale for $48. What was the percent discount?
1. 1 answer
2. 651 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. 681 views
Is this reaction exothermic or endothermic? Fe(NO3)3+ NaSCN
1. 0 answers
2. 973 views
Acid spills are often neutralized with sodium carbonate. For exampleNa2CO3 (s) + H2SO4 (aq)  Na2SO4 (aq) + CO2 (g) + H2O (l)
1. 5 answers
2. 3,724 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. 673 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. 1,416 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. 1,056 views
Use the “difference of squares” rule to factor the following expression: 100a^6-64b^8
1. 1 answer
2. 508 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. 707 views
Factor out the greatest common factor from the expression9a2b3 – 12a2b4 – 24a3b
1. 1 answer
2. 1,004 views
Factor out the greatest common factor from the expression 36x^3-30x^2
1. 1 answer
2. 911 views
Factor the expression 16x^2-72xy+81y^2 into a product of binomials.
1. 1 answer
2. 990 views
Factor the following expression completely:45x^3y – 80xy
1. 1 answer
2. 944 views
15t^2+7t=2
1. 3 answers
2. 375 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. 555 views
Solve by factoring:2a^2 − 3a = −5
1. 1 answer
2. 478 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. 713 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. 584 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. 617 views
Factor by grouping, if possible, and check5x3 + 4x2 − 10x – 8
1. 1 answer
2. 462 views
Factor completely. If a polynomial is prime, state this9 + 8t^2 - 18t
1. 1 answer
2. 668 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. 620 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. 944 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. 480 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. 1,009 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. 608 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. 1,435 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. 557 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. 657 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. 1,137 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. 428 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. 1,104 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. 536 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. 508 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. 460 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. 579 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. 421 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. 662 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. 522 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. 550 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. 544 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. 421 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. 516 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. 567 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. 846 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. 1,386 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. 832 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. 1,812 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. 1,317 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. 736 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. 636 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. 1,196 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. 3,481 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. 1,493 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. 950 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. 887 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. 1,855 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. 432 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. 639 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. 1,186 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. 2,754 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. 5,997 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. 559 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. 2,453 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. 726 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. 2,179 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. 4,605 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. 3,782 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. 1,849 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. 684 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. 879 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. 1,283 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. 832 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. 1,026 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. 1,081 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. 1,251 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. 1,064 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. 2,209 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. 818 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. 1,157 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. 2,201 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. 7,943 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. 5,330 views

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