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zepelin [54]
4 years ago
7

A wise woman once said, "400 reduced by twice my age is 262." What is her age?

Mathematics
2 answers:
Elden [556K]4 years ago
6 0

Answer:

<h3>                 69</h3>

Step-by-step explanation:

x -  age of wise woman

2x -  twice the age of wise woman

400 - 2x    - 400 reduced by twice the age of wise woman

400 - 2x = 262

400 - 262 = 2x

138 = 2x

2x = 138

<u>x = 69</u>

vekshin14 years ago
3 0

Answer:

331..?

Step-by-step explanation:

262 = 2a-400

662 = 2a

331

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Write the equation of a circle.
weeeeeb [17]

Answer:

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Step-by-step explanation:

The equation is (x-h)^2 + (y-k)^2=r^2

h=-1,k=7 and r=14

(x-(-1))^2 + (y-7)^2= 14^2

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4 0
4 years ago
Given the sequence in the table below, determine the sigma notation of the sum for term 4 through term 15. N an 1 4 2 −12 3 36 t
Rzqust [24]

By applying basic property of Geometric progression we can say that sum of 15 terms of a sequence whose first three terms are 5, -10 and 2 is                    \sum_{n=4}^{15} 5(-2)^{n-1}$$  

<h3>What is sequence ?</h3>

Sequence is collection of  numbers with some pattern .

Given sequence

a_{1}=5\\\\a_{2}=-10\\\\\\a_{3}=20

We can see that

\frac{a_1}{a_2}=\frac{-10}{5}=-2\\

and

\frac{a_2}{a_3}=\frac{20}{-10}=-2\\

Hence we can say that given sequence is Geometric progression whose first term is 5 and common ratio is -2

Now n^{th}  term of this Geometric progression can be written as

T_{n}= 5\times(-2)^{n-1}

So summation of 15 terms can be written as

\sum_{n=4}^{15} T_{n}\\\\$\\$\sum_{n=4}^{15} 5(-2)^{n-1}$$

By applying basic property of Geometric progression we can say that sum of 15 terms of a sequence whose first three terms are 5, -10 and 2 is                    \sum_{n=4}^{15} 5(-2)^{n-1}$$  

To learn more about Geometric progression visit : brainly.com/question/14320920

8 0
3 years ago
\sqrt{12} real number whole number integer rational number
Sladkaya [172]

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7 0
3 years ago
How many solutions does the system have?
amid [387]

Answer:

A; infinitely many solutions

Step-by-step explanation:

first, let's simplify the first equation to make it simpler.

divide both sides by 5

y=3x-8

new system

y=3x-8

y=3x-8

as you can see, they are the same.

not mandatory but useful!⬇⬇⬇⬇

just to be more clear, let's substitute them. since they're both already in y=, we can make them both set to each other.

3x-8=3x-8

add 8 to both sides; subtract 3x from one side

0=0

the answer is A, Infinitely many solutions.

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