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Rina8888 [55]
3 years ago
14

Give an example of an open equation? my answer is, x + 4 = 7 Until the value of x is found, it is unknown whether the equation i

s true or false. am i right?
Mathematics
1 answer:
Sphinxa [80]3 years ago
8 0
Yes you’re right you cannot know if the equation is true or false
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Help! Please show work. -2k+10=8(8k-7)
Burka [1]

Answer:

k=1

Step-by-step explanation:

-2k+10=64k-56

66=66k

k=1

7 0
3 years ago
A 10 kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. At time t
xz_007 [3.2K]

Full Question

A 10 kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. At time t = 0, the resulting mass—spring system is disturbed from its rest state by the force F (t) = 20 cos(8t). The force F (t) is expressed in Newtons and is positive in the downward direction, and time is measured in seconds.

Determine the spring constant k.

Answer:

Spring Constant = 1000Nm^-1

Step-by-step explanation:

Given

Mass = 10kg

Spring Extension = 9.8cm

Spring Constant K = Force/Extension

Force = Mass * Acceleration

Force = 10 * 9.8 = 9.8N

Spring Extension = 9.8 cm = 9.8 /100 = 0.098 m

Spring constant = 98 / 0.098

Spring Constant = 1000Nm^-1

3 0
2 years ago
PLEASE HELPPP (NO LINKS) (NO LINKS) (NO LINKS)
rosijanka [135]

Answer:

  • B, B, C

Step-by-step explanation:

1.

Shirts cost $20 each and ties cost $12 each.

<u>Expression for the cost:</u>

  • 20s + 12t

Correct choice is B

2.

<u>An expression that represents 40% of a number is:</u>

  • 40*n/100 = 0.4n

Correct choice is B. False

3.

t = -2, x = 3 and z = 5

  • 4z + 3x − t =
  • 4*5 + 3*3 - (-2) =
  • 20 + 9 + 2 =
  • 31

Correct choice is C. 31

3 0
3 years ago
Read 2 more answers
Sadie started reading at 3:31 and finishes at 6:10. How long did Sadie read?
Valentin [98]

Answer:

2h and 39mins

Step-by-step explanation:

If you are unsure of these times questions. I suggest you draw a timeline! it helps! Trust me!!

6 0
2 years ago
Mike has a collection of 140 canada stamps ,284 mexico stamps and 775 united states stamps about how many united states and cana
Doss [256]

Answer:

915 stamps

Step-by-step explanation:

140 + 775 = 915

4 0
2 years ago
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