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4 years ago

Solve the equation 2x-1=13.

Mathematics

2 answers:

netineya [11]4 years ago

8 0

Answer:

Step-by-step explanation:

2 time 7 = 14-1 = 13

tiny-mole [99]4 years ago

5 0

Answer:

x=7

Step-by-step explanation:

Collect like terms

2x=13+1.

2x=14

Divide both side by 2

$\frac{2x}{2} = \frac{14}{2}$

x=7

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What is an equivalent expression to 7x + 56

klasskru [66]

It would be equivalent to x=8

5 0

3 years ago

How many 4 digit multiples can not be divided by 5

Advocard [28]

Answer:

1800

Step-by-step explanation:

Let us solve this question by Modular Airthmatic.

Let the lowest 4 digit number be X.

X= 1 (mod 5)

X =2 (mod 5)

X=3 (mod 5)

X =4 (mod 5)

X=1+5 t where t is any integer.

1+5 t=2 (mod 5)

5 t=1 (mod 5 )

5 is the Modular Inverse of modulo 5

t=1 (mod 5)

t =1+5 u : u= any integer.

X becomes 1+ 5 (1+5u )=6+25 u

6+25u =3 (mod 5)

25 u= -3 (mod 5)=2 (mod 5)

25 is Modular Inverse of Modulo 5

u=2 (mod 5)

u =2+5 v : v= any integer.

X becomes 6 +25 (2+5 v)=56+125 v .

56 +125 v=4 (mod 5)

125 v=-52 (mod 5)=3 (mod 5)

125 is Modular Inverse of modulo 5

v = 3 (mod 5)

v =3 +5 w where w is any integer.

For lowest 4 digit number, take

w=200

X=1003 : Lowest 4 digit number.

Take w=201

X=208 : Next number.

For 4 digit largest number, take

w=1995

X= 9978 : Largest number.

No. of Numbers =(1995 - 200 )+1=1800 □Ans.

8 0

3 years ago

Read 2 more answers

The town of Madison has a population of 25000 The population is increasing by a factor of 1.12 each year.

Fudgin [204]

Answer:

$P(t) = 25,000*1.12^t$

Step-by-step explanation:

The populational growth is exponential with a factor of 1.12 each year. An exponential function has the following general equation:

$y(x) = ab^x$

Where 'a' is the initial population (25,000 people), 'b' is the growth factor (1.12 per year), 'x' is the time elapsed, in years, and 'y(x)' is the population after 'x' years.

Therefore, the function P(t) that models the population in Madison t years from now is:

$P(t) = 25,000*1.12^t$

8 0

3 years ago

Read 2 more answers

Apply

pshichka [43]

Answer:

myrna farm has 265 and the commercial farm 500

Step-by-step explanation:

7 0

3 years ago

X,y,z and l are proportional quantites, prove that : y–x/x = l–z/z

Vera_Pavlovna [14]

Answer:

y=24

Step-by-step explanation:

7 0

2 years ago