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3 years ago

Nine subtracted from twice a number

Mathematics

1 answer:

professor190 [17]3 years ago

7 0

Answer:

2x - 9 = -5

2x = 4

x = 2

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How is the Distributive Property used to simplify operations with scientific notation

Citrus2011 [14]

Answer:

See explanation

Step-by-step explanation:

Let a,b, and c be real numbers.

The distributive property says that:

$a(b + c) = ab + ac$

Assuming we want to simplify:

$10(5*10^{-1}+150*10^{-3})$

We apply the distributive property to get:

$10(5*10^{-1}+150*10^{-3}) = 5*10^{-1} \times 10+150*10^{-3} \times 10$

We can now use rules of exponents to simplify further:

$10(5*10^{-1}+150*10^{-3}) = 5*10^{-1} \times 10^{1} +150*10^{-3} \times 10^{1}$

$10(5*10^{-1}+150*10^{-3}) = 5*10^{-1 + 1} +150*10^{-3 + 1}$

$10(5*10^{-1}+150*10^{-3}) = 5*10^{0} +150*10^{-2}$

$10(5*10^{-1}+150*10^{-3}) = 5*1+1.50*10^{-2}x {10}^{2}$

$10(5*10^{-1}+150*10^{-3}) = 5*1+1.50*10^{-2 + 2}$

$10(5*10^{-1}+150*10^{-3}) = 5+1.50*10^{0} = 6.5 \times {10}^{0}$

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3 years ago

For the inverse variation equation xy = k, what is the constant of variation, k, when x = –2 and y = 5?

Harlamova29_29 [7]

I believe it would be 3.5? I could be wrong, but inverse variation usually moves by the constant rate of 2.

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What is the expression and value of "six less than the quotient of a number and two, increased by ten" when n = 20?

fredd [130]

Answer:

The value is 14

Step-by-step explanation:

six less than (next quotient -6) the quotient of a number and two (n/2), increased by ten (+10) when n = 20.

(n/2)+10-6; n=20

Substitute 20 in for n.

(20/2)+10-6

Divide and subtract.

10+4

Add.

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Answer:

probably (-2, 4)

Step-by-step explanation:

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