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zepelin [54]
3 years ago
10

A bullet of mass m1 = 0.020 kg is fired with initial speed v1 into a block of mass m2 = 0.500 kg that is initially at rest. The

bullet becomes embedded in the block and the pair slide along to the right a distance d= 0.35 m over a rough surface with uk = 0.25. the spring (with k = 450 N/m) is compressed by a distance of x = 0.075 m. work backwards and determine the initial velocity of the bullet.
Mathematics
1 answer:
kari74 [83]3 years ago
4 0
The answer wii ph hold be 147
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Solve and show your work.<br><br> 1. 3(2x + 3) - 4x = -3<br><br> 2. 26 = 3x - 2 - 7x
yKpoI14uk [10]

Answer:

1. x=-6

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

3(2x+3)−4x=−3

(3)(2x)+(3)(3)+−4x=−3(Distribute)

6x+9+−4x=−3

(6x+−4x)+(9)=−3(Combine Like Terms)

2x+9=−3

2x+9=−3

Step 2: Subtract 9 from both sides.

2x+9−9=−3−9

2x=−12

Step 3: Divide both sides by 2.

x=-6

3 0
3 years ago
Lisa is standing on a dock beside a lake. She drops a rock from her hand into the lake. After the rock hits the surface of the l
Lemur [1.5K]

Answer:

  • 5 ft 8 in or 68 in

Step-by-step explanation:

<u>In 4 seconds the rock will be at:</u>

  • 2*4 = 8 in from the surface

<u>Add 5 feet to this to get the required distance:</u>

  • 5 ft + 8 in = 5*12 in + 8 in = 68 in
7 0
3 years ago
Read 2 more answers
The charge for the trip is $25 for a car and $50 for a truck.
inessss [21]
Charge for x cars is 25x
Charge for y trucks is 50y
Total charge is 25x + 50y
25x + 50y = 3000
x + 2y = I20
Answer: x + 2y = 120
3 0
2 years ago
Huixian needs to pack 171 pens,63 pencils and 27 erasers in to identical gift bags so that each item is equally distributed amon
BaLLatris [955]

Answer:

i) 9

ii) 19 pens, 7 pencils, 3 erasers

Step-by-step explanation:

i) 171 = 3² x 19

   63 = 3² x 7

    27 = 3³

Highest Common Factor/HCF (171, 63, 27) = 3² = 9

Largest no. of bags = 9

ii) In each bag,

   No. of pens = 171 / 9 = 19

   No. of pencils = 63 / 9 = 7

   No. of erasers = 27 / 9 = 3

5 0
3 years ago
2(x+5)= 5x +23<br> How to show your work?
Wewaii [24]

Answer:

x = 4 1/3 or 13/3

Step-by-step explanation:

First: Distribute

2(x+5) = 5x + 23 ----->  2x + 10 = 5x + 23

Second: Put like terms together

subtract 2x from both sides, then subtract 23 from both sides

-13 = 3x

Third: Divide and solve for x

-13/3 = x

x= 4 1/3 or 13/3

8 0
3 years ago
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