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2 years ago

Is (7, -2) a solution to this system of equations? X - 5y = -3 y = -2 yes no

Mathematics

1 answer:

MatroZZZ [7]2 years ago

3 0

Answer:

No.

Step-by-step explanation:

Plug in -2 for y and 7 for x in the first equation:

x - 5y = -3

(7) - 5(-2) = -3

Simplify. Remember to follow PEMDAS.

PEMDAS is the order of operations, and stands for:

Parenthesis

Exponents (& roots)

Multiplications

Divisions

Additions

Subtractions

First, multiply -5 with -2:

7 + (-5 * -2) = -3

7 + (10) = -3

Next, add:

7 + 10 = -3

17 ≠ -3

(7, -2) is not a solution for the given system of equations:

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3 years ago

Taye recruits two people to be election campaign volunteers. The next week he ask each of those volunteers to recruit two more c

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Using a geometric sequence, it is found that:

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b) Hence some of the volunteers can stop recruiting new volunteers during the 7th week.

<h3>What is a geometric sequence?</h3>

A geometric sequence is a sequence in which the result of the division of consecutive terms is always the same, called common ratio q.

The nth term of a geometric sequence is given by:

$a_n = a_1q^{n-1}$

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Hence the number of people after n weeks is:

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$a_3 = 2 \times 2^{3 - 1} = 8$

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There will be 150 volunteers when $a_n = 150$ , hence:

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The above is because 2^7 = 128 and 2^8 = 256, and 128 < 150 < 256.

Hence some of the volunteers can stop recruiting new volunteers during the 7th week.

More can be learned about geometric sequences at brainly.com/question/11847927

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1 year ago

Please help.

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Answer:

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Step-by-step explanation:

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