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Kitty [74]
3 years ago
13

For the sequence of numbers

Mathematics
1 answer:
Sedbober [7]3 years ago
6 0

Answer:

The term rule will be:

a_n=n+21

Step-by-step explanation:

Given the sequence

22, 23, 24, 25, ...

Computing the common difference of all the adjacent terms

22,\:23,\:24,\:25

23-22=1,\:\quad \:24-23=1,\:\quad \:25-24=1

As the difference between all the adjacent terms is the same and equal to

d=1

The first element of the sequence

a_1=22

We know that  An Arithmetic sequence has a constant difference 'd' and is defined by

a_n=a_1+\left(n-1\right)d

substituting a_1=22, and d=1 in the nth term to get the term rule

a_n=a_1+\left(n-1\right)d

a_n=\left(n-1\right)+22

a_n=n+21

Therefore, the term rule will be:

a_n=n+21

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2 years ago
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The legs of a right triangle measure 3x and 15. If the hypotenuse measures 3x + 3, what is the value of x?
Ivan
The answer is <span>b.12
</span>
According to the Pythagorean theorem the square of the hypotenuse (c) is the sum of the squares of the legs (a and b):
 c² = a² + b²

We have:
a = 3x
b = 15
c = 3x + 3

Now, let's replace these parameters:
c² = a² + b²
(3x + 3)² = (3x)² + 15²
(3x)² + 2 * 3x * 3 + 3² = 9x² + 225
9x² + 18x + 9 = 9x² + 225

Rearrange:
9x² - 9x² + 18x = 225 - 9
18x = 216
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4 0
3 years ago
Given: X = r + 2, Y = 2r - 9, and Z = r 2 + 17r + 30. Simplify [X · Y - Z] ÷ X.
musickatia [10]

Answer: r - 24

Step-by-step explanation:

X=r+2;Y=2r-9;Z=r^2+17x+30

\frac{x*y-z}{x}

\frac{[(r+2)(2r-9)]-(r^2+17r+30)}{r+2}

\frac{(2r^2-9r+4r-18)-(r^2+17r+30)}{r+2}

\frac{(2r^2-5r-18)-(r^2+17r+30)}{r+2}

\frac{2r^2-5r-18-r^2-17r-30)}{r+2}

Combine like terms;

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Solve the quadratic equation;

\frac{(r-24)(r+2)}{r+2}

Simplify;

r-24

8 0
3 years ago
How to simplify -(-7y+12)
faust18 [17]
-(-7y + 12) = 7y - 12
u are distributing the -sign through the parenthesis...so u take the number outside of the parenthesis (and if it just a sign, the number is 1)...and u multiply it by everything in the parenthesis.
-1(-7y + 12) = -1 * -7y + (-1) * 12 = 7y + (-12) = 7y - 12
7 0
3 years ago
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