All categories

3 years ago

2n + 1 =7 Show work please

Mathematics

2 answers:

HACTEHA [7]3 years ago

7 0

So,the right answer is 3.

Look at the attached picture

Hope it will help you

Schach [20]3 years ago

3 0

N=3

This is very basic, so it won't take long. First step in any algebraic question is to combine like terms, any term with alike variables or constants. So to begin with we need to combine the constants.
2n+1=7 To combine like terms, we need to move the 1 over to the seven by subtracting on both sides like a mirror.
2n+1-1=7-1
2n=6
Then, since it's 2n we need to divide by two to get n isolated.
2n/2=6/2
n=3

The final answer is n=3.

You might be interested in

Two trains travel a 160 km track each day. The express travels 10 km h^-1 faster and take 30 minutes less time than the normal t

aniked [119]

Let s = the speed of the slower train in km/hrs+10 = the speed of the faster train in km/hrLet t = time in hrs for the slower train to go 160 kmt-5 = time in hrs for faster train to go 160 km---------------Slower train:(1)
160=s.t

Faster train:(2) 160=(s+10) .(t-.5)From (1)(1) t=160/s
use the relations given in following screenshot and then use quadratic equation.

4 0

4 years ago

A1=-10 d=-12 what are the first five terms

kykrilka [37]

The first 5 terms of the arithmetic sequence with first term -10 and common difference -12 are ...
-10, -22, -34, -46, -58

3 0

3 years ago

1. In your response, consider the specific ways a business professional might need to communicate information using a chart or g

Yanka [14]

A BUSSINESS MEETING A GROUP MEETING AS WHILE!!!!!!!!!!!!!!!!!!!

3 0

4 years ago

A 40-foot ladder is leaning against a building and forms a 29.32° angle with the ground. How far away from the building is the b

EastWind [94]

Answer:

Step-by-step explanation:

The set up forms a right angle triangle with the length of the ladder being the hypotenuse and the angle of elevation is 29.32°. USing SOH, CAH TOA to determine the distance of the building from the base of the ladder.

The distance we are looking fir will be the adjacent. According to CAH.

cos29.32°= x/40

x = 40cos29.32°

x = 34.88feet (to the nearest hundredth)

The ladder is 34.88feet away from the building

4 0

4 years ago

Read 2 more answers

A car is at a distance s, in miles from its starting point in t hours, given by s(t)=10t^2. Find s(2) and s(5). Find s(5)-s(2).

weeeeeb [17]

Answer:

Average Velocity= 70 miles per hour

Step-by-step explanation:

Distance= s

Time = t

s(t)=10t^2

Putting the values

s(2) = 10 (2)^2= 10&4

s= 40

s(5) = 10 (5)^2 = 10*25

S(5)= 250

The average velocity is defined as the rate of change of speed in unit time.

Speed= distance/time

Velocity = Speed in a definite direction

Average Velocity= Displacement/ Time

Average Velocity= Change in distance/ Change in time

s(5) - s(2)/ t(5)- t(2)

= 250-40/5-2= 210/3= 70 miles per hour

4 0

3 years ago