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3 years ago

Help!!!!????!!!???!!

Mathematics

1 answer:

Anon25 [30]3 years ago

7 0

Answer:

π/3

Step-by-step explanation:

-5π/3 is a co terminal of 2π-5π/3= (6π-5π)/3=π/3

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The amount, A, in milligrams, of radioactive material remaining in a container can be modeled by the exponential function A(t) =

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Step-by-step explanation:

A(0) has to be amount at start. Assume that's 5mg

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We need to such that A(t) = 2.5mg, or 2^(-t/4) is 1/2, which happens when -t/4 is -1, or t is 4.

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3 years ago

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Where is the point (-4 -5) located on the coordinate plane

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2 years ago

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A woman is q years old while her son is p years old. the sum of their ages is equal to twice the difference of their ages. the p

Allisa [31]

Step-by-step explanation:

Given

$q + p = 2(q - p)$

as equation 1.

I used q-p as the difference as logically the woman will be older than her son.

Also given,

$qp = 675$

as equation 2.

Using equation 2,

$q = \frac{675}{p}$

substitute this equation into equation 1.

$\frac{675}{p} + p = 2( \frac{675}{p} - p) \\ \frac{675}{p} + p = \frac{1350}{p} - 2p \\ \frac{675}{p} - \frac{1350}{p} = - 2p - p \\ - 3p = - \frac{675}{p} \\ - 3p \times p = - 675 \\ - 3 {p}^{2} = - 675 \\ {p}^{2} = - 675 \div - 3 \\ {p}^{2} = 225 \\ p = \sqrt{225} \\ = 15$

Substitute P into equation 2.

$15q = 675 \\ q = 675 \div 15 \\ = 45$

Therefore the woman is 45 years old while her son is 15 years old.

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2 years ago