2 years ago

Which set or sets does the number 15 belong to

Mathematics

1 answer:

DENIUS [597]2 years ago

3 0

Rational,real,integer,whole number,natural number

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Factor completely. 3x^2-3x-18 HINT: Factor out the greatest common factor first.

lubasha [3.4K]

Answer:

3(x - 3)(x + 2)

Step-by-step explanation:

take out a common factor of 3 from each term

= 3(x² - x - 6)

to factor the quadratic consider the factors of - 6 which sum to - 1

These are - 3 and + 2, hence

3x² - 3x - 18 = 3(x - 3)(x + 2) ← in factored form

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2 years ago

Eight randomly selected customers at a local grocery store spent the following amounts on groceries in a single visit: $216, $18

chubhunter [2.5K]

Answer:

a) 910

b) 828100

c) 144320

Step-by-step explanation:

a. ∑y

This is the sum of all values of y. So

$\sum y = 216 + 184 + 35 + 92 + 142 + 175 + 9 + 57 = 910$

b. (∑y)^2

This is the square of the sum, so the square of 910, that we found in the previous item.

910² = 828100

c. ∑y^2

This is the sum of the squares of each amount spent. So

$\sum y^2 = 216^2 + 184^2 + 35^2 + 92^2 + 142^2 + 175^2 + 9^2 + 57^2 = 144320$

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2 years ago

If 3x+y=14, and x and y are positive integers, all of the following could be the value of x+y EXCEPT? This is an sat question an

vodka [1.7K]

Possible values are

x=1,y=11

x=2,y=8

x=3,y=5

x=4,y=2

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2 years ago

How do I do fractions and comparing them

RUDIKE [14]

You could turn the fraction into a decimal and then see which is bigger

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2 years ago

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Help Me Please I will Give Brainliest If Correct!!!

disa [49]

Answer:

8^-2a^7 = a^7/8^2 = a^7/64

Step-by-step explanation:

6 0

2 years ago

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