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3 years ago

9. Jackie invited 17 people to

Mathematics

1 answer:

daser333 [38]3 years ago

4 0

Answer:

Step-by-step explanation:

17 - 8 = 9 people came

The number of presents brought is 3×9 = 27.

Jackie got 27 presents.

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On a graph what is y=-x

Galina-37 [17]

Sorry about the drawing but the line starts at the origin of the graph and since it is -x which means it has a negative slope. So the line would start at the origin going down by the slope of -1. hope this makes sense

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3 years ago

Find the smallest positive integer k such that 3240/k is a square number

sashaice [31]

Answer:

Step-by-step explanation:

First, factorize the number 3,240:

$3,240=2\cdot 1,620=2\cdot 2\cdot 810=2\cdot 2\cdot 2\cdot 405=2\cdot 2\cdot 2\cdot 2\cdot 5\cdot 81=2^3\cdot 5\cdot 9^2$

So,

$3,240=2^2 \cdot 2\cdot 5\cdot 9^2=18^2\cdot 10$

Now consider the fraction

$\dfrac{3,240}{k}=\dfrac{18^2\cdot 10}{k}$

If k = 10, then

$\dfrac{3,240}{k}=\dfrac{18^2\cdot 10}{10}=18^2$

is a square number.

For all k < 10, the fraction tex]\dfrac{3,240}{k}[/tex] is not a square number (this follows from factorization).

Or you can simply check the values of the fraction for all k < 10:

k = 1, $\dfrac{3,240}{1}=3,240$ is not a square number;
k = 2, $\dfrac{3,240}{2}=1,620$ is not a square number;
k = 3, $\dfrac{3,240}{3}=1,080$ is not a square number;
k = 4, $\dfrac{3,240}{4}=810$ is not a square number;
k = 5, $\dfrac{3,240}{5}=648$ is not a square number;
k = 6, $\dfrac{3,240}{6}=540$ is not a square number;
k = 7, $\dfrac{3,240}{7}$ is not a square number;
k = 8, $\dfrac{3,240}{8}=405$ is not a square number;
k = 9, $\dfrac{3,240}{9}=360$ is not a square number.

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3 years ago

How do I solve −6 + 9(8 − 2b) using distributive property or combining like terms.

Levart [38]

Answer:

66-18b

Step-by-step explanation:

-6+72-18b

66-18b

solving for b

b=3.66 or 3 and 2/3

7 0

3 years ago

Simplify the expression<br> (1 + 1/x)(1 - 2/x+1)(1 + 2/x-1)

valentinak56 [21]

Answer: 4(×+1) (×-1)

Step-by-step explanation:

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2 years ago

NEED HELP DUE IN 10 MINUTES!!!

slavikrds [6]

Where is the question? I would be more than happy to help you but you did not post a question

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2 years ago