MATHEMATICS MIDDLE SCHOOL

(19b-1)-9 (2b+4)=-7

plz show work step by step (i give thank yous)​

Answers

Answer 1
Answer:

Answer:

b=30

Step-by-step explanation:

19b-1-9(2b+4)=-7\n\Leftrightarrow 19b-18b-36=-6\n\Leftrightarrow b=30

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An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? Formula=1/2mv^2 a(7.5 b(15 kg c(60 kg d(120 kgnevermind i found the answer its (15 kg) because to solve for m its m= K2/v squared

Answers

The Kinetic Energy (K.E) of an object can be calculated as:

K.E= (1)/(2)mv^(2)

We are given:
K.E = 480 K
Velocity of the object = v = 8 m/s

Using the values, we get:

480= (1)/(2)m(8)^(2) \n \n 480= (1)/(2)*64m \n \n 480=32m \n \n m=15

Thus, the mass of the object will be 15 kg.

So the correct answer is option b

Hello!

An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object ?

We have the following data: 

KE (Kinetic Energy) = 480 J

m (mass) = ? (in Kg)

v (speed) = 8 m/s

Formula to calculate kinetic energy:

\boxed{KE = (1)/(2)*m*v^2}

Solving:

KE = (1)/(2)*m*v^2

480 = (1)/(2)*m*8^2

480 = (1)/(2)*m*64

480*2 = 64*m

960 = 64\:m

64\:m = 960

m = (960)/(64)

\boxed{\boxed{m = 15\:Kg}}\end{array}}\qquad\checkmark

Answer:  

b) 15 kg

_______________________________

I Hope this helps, greetings ... Dexteright02! =)

Combine the like terms: 8a+8b-2a

Answers

8a + 8b - 2a

8a and 2a are like terms.
Note: always remember to include the sign in front of a term (if there is no sign, then it is a plus). Here, it’s:

+8a -2a = 6a

8b is not a like term with 6a, because b and a are unable to be added together/multiplied.

So, the answer is:

6a + 8b

Or
8b + 6a

PLZ HELP 20 POINTS!

What is7√2 in simplest radical form?

Answers

9.8 I think... I hope this helps in any way

If Tim ran four and one half miles on Saturday and he ran seven and one third miles on Sunday. How many total miles did Tim run

Answers

Saturday 4 1/2

Sunday 7 1/3

First you would have to find common denominator

4 1/2 + 7 1/3

4  3/6  + 7  2/6  = 11 5/6

So, Tim ran a total of 11 5/6 miles on both days.

Hope that helps you. :-)
Saturday: ran 4 1/2 miles
Sunday: ran 7 1/3 miles
4 1/2 + 7 1/3
4 3/6 + 7 2/6= 11 5/6
Tim ran 11 5/6 miles total

What is the Kinetic energy of a 0.5 kg soccer ball that is traveling at a speed of 3 m/s?

Answers

The kinetic energy of the soccer is 2.25 J.

What is Kinetic energy?

The kinetic energy of the soccer is the energy possessed by the soccer due to its motion and the can be determined using the following formula;

K.E = ¹/₂mv²

where;

  • m is mass of the soccer
  • v is the velocity of the soccer

Substitute the given parameters and solve for the kinetic energy of the soccer.

K.E = ¹/₂ x 0.5 x (3)²

K.E = 2.25 J

Thus, the kinetic energy of the soccer is 2.25 J.

Learn more about kinetic energy here: brainly.com/question/25959744
Kinetic energy formula is
K.E = (1)/(2)mv²

m = 0.5 kg
v = 3 m/s

Plug in the given.

K.E = (1)/(2) × (0.5) × (3)²
       = 2.25 J

Pliz answer this pliz

Answers

You have to do 357 divided by 100 and that will equal you answer of 3.57 meters
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