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lesya692 [45]
4 years ago
7

What is three added to a number

Mathematics
2 answers:
Brut [27]4 years ago
8 0

Answer:

3n

Step-by-step explanation:

3+n

this should be right if it's not please comment on this answer but I'm sure it's right!

HACTEHA [7]4 years ago
6 0

Answer: Three added to a number is the number you started with + 3

Step-by-step explanation:

3 + n because 3 + n is adding 3 to the other number

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What is the twentieth term of the arithmetic sequence described by the<br> equation an= 3n - 10?
sergij07 [2.7K]

Answer:

The twentieth term is 50.

Step-by-step explanation:

The equation that describes the arithmetic sequence describes it's "general term", which means that all the numbers in that sequence must follow that equation. For instance, if we want to find the first term of the sequence we must make a = 1 and we have:

a1 = 3*1 - 10

a1 = -7

Therefore to find the twentieth term we need to make n equal to 20. This is done below:

a20 = 3*20 - 10

a20 = 60 - 10

a20 = 50

The twentieth term is 50.

8 0
4 years ago
Find an equation of the line that is the perpendicular bisector of the line segment joining the points (6,2) and (18,6)
dexar [7]

Answer:

y= -3x +40

Step-by-step explanation:

Properties of perpendicular bisector:

• perpendicular to the given line

• cuts through the center of the given line

The equation of a line can be written in the form of y=mx +c, where m is the gradient and c is the y -intercept.

Let's find the gradient of the given line first.

\boxed{gradient =  \frac{y1 - y2}{x1 - x2} }

Gradient of given line

=  \frac{6 - 2}{18 - 6}

=  \frac{4}{12}

=  \frac{1}{3}

The product of the gradients of perpendicular lines is -1.

m(⅓)= -1

m= -1(3)

m= -3

Substitute m= -3 into the equation:

y= -3x +c

To find the value of c, substitute a pair of coordinates in which the perpendicular bisector passes through into the equation. Since perpendicular bisectors passes through the center of the segment, we can find the point in which the perpendicular bisector passes through using the mid- point formula.

\boxed{midpoint = ( \frac{x1 + x2}{2} , \frac{y1 + y2}{2} )}

Midpoint

= ( \frac{6 + 18}{2} , \frac{6 + 2}{2} )

= ( \frac{24}{2} , \frac{8}{2} )

= (12,4)

y= -3x +c

when x= 12, y= 4,

4= -3(12) +c

4= -36 +c

c= 4 +36

c= 40

Thus, the equation of the perpendicular bisector is y= -3x +40.

6 0
3 years ago
Increase £30 by 2/5?
Sergeu [11.5K]
2/5 of 30 = 12
30 + 12 = 42
£42
6 0
4 years ago
The radius of a right circular cone is 2 in. By what factor will the volume change if the radius of the cone is multiplied by 3
Vinil7 [7]
The volume of a right
circular cone increased by a
factor of 25. If the height
remained fixed, by what
factor was the radius
7 0
3 years ago
Is 35,32,29,26 arithmetic
OLEGan [10]

Answer:

Step-by-step explanation:

Yes, the defining characteristic of an arithmetic sequence is that any term subtracted by the previous term is a constant, called the common difference. In this case the common difference is 32-35=29-32=26-29= -3

5 0
3 years ago
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