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Amiraneli [1.4K]
3 years ago
9

48=56+8b solve for b

Mathematics
2 answers:
Ivanshal [37]3 years ago
6 0

• Answer:

b = - 1

• Step-by-step explanation:

48 = 56 + 8b

48 - 56 = 8b

8b = - 8

b = - 8 ÷ 8

b = - 1

nata0808 [166]3 years ago
4 0

Answer:

b= -1

Step-by-step explanation:

48         =.    56 +8b

-56             -56

---------------------------------

-8       =   8b

Divide 8 on both sides

-1=b

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A textbook store sold a combined total of 368 psychology and sociology textbooks in a week. The number of psychology textbooks s
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Total books = 368.

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3 years ago
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22  True  For all real Numbers A and B,  A  -   B   =    -B   +  A

23  True   For all real Numbers  P, Q, and R, P  -  Q  - R  =  P - R  - Q

24) True For all real Numbers  X, Y, Z and (X   +  Y )  +  Z  =  Z   +  (X  +  Y)

25) False  For all real Numbers M and N,  M/M * N = N/N ==> Example: 5/5  *  3  ≠   3/3  *  5

26) Examples:

Counterexamples =====>   5  - 0  = 5;   5/1   =  5  

5   -  3   ≠  3    -   5;   (5 -  3 )  -    2  ≠   5  -  (3   -  2 );    

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5 0
3 years ago
Fred runs 4 laps around a track in 6 minutes. How many minutes per lap is that? How many laps per minute?
denis-greek [22]

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8 0
2 years ago
Rich is comparing the cost of maintaing his car with the depreciating value of the car. When will the cost and value be the same
goldfiish [28.3K]

Complete question:

Rich is comparing the cost of maintaining his car with the depreciation value of the car.

The value starts at $20,000 and decreases by 15% each year. The maintanance cost is $500 the first year and increases by 28% per year.

When will the maintenance cost and the value be the same.

Answer:

9 years

Step-by-step explanation:

Depreciation is modeled by an exponential function :

A = p(1 - r)^t [decrease, '-']

A = 20,000(1 - 0.15)^t

A = 20000(0.85)^t - - - (1)

Maintainace cost :

A = p(1 + r)^t ; [increase, '+']

A = 500(1 + 0.28)^t

A = 500(1.28)^t - - - (2)

Equating (1) and 2

20000(0.85)^t = 500(1.28)^t

1.28^t / 0.85^t = 20000/500

(1.28 / 0.85)^t = 40

Take log of both sides

Log (1.28 / 0.85)^t = log 40

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t = 1.6020599 / 0.1777910

t = 9.01

t = 9 years

8 0
3 years ago
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