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3 years ago

I need some homework help please.

Mathematics

2 answers:

vlada-n [284]3 years ago

5 0

I think the person on top got you with the answer

Sonja [21]3 years ago

4 0

Answer:

x^2-5x=6

x^2-5x-6=0

x^2+x-6x-6=0

x(x+1)-6(x+1)=0

(x-6)(x+1)=0

x=6, -1

-5x= -30, 5

Step-by-step explanation:

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Evaluate m+n for m = 9 and n=7

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Answer:

Step-by-step explanation:

4 0

3 years ago

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Write 640 g as a fraction of 4.8 kg. Give your answer in its simplest form,

vitfil [10]

Answer:

Step-by-step explanation:

640g=640g

4.8kg=4800g

640g/4800g=2/15

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2 years ago

An old bone contains 80% of its original carbon-14. Use the half-life model to find the age of the bone. Find an equation equiva

Ira Lisetskai [31]

Answer:

An old bone contains 80% of its original carbon-14 in 1844.6479 years

Step-by-step explanation:

We know that

half life time of C-14 is 5730 years

so, h=5730

now, we can use formula

$P(t)=P_0(\frac{1}{2})^{\frac{t}{h} }$

we can plug back h

and we get

$P(t)=P_0(\frac{1}{2})^{\frac{t}{5730} }$

An old bone contains 80% of its original carbon-14

so,

P(t)=0.80Po

we can plug it and then we solve for t

$0.80P_0=P_0(\frac{1}{2})^{\frac{t}{5730} }$

$0.80=(\frac{1}{2})^{\frac{t}{5730} }$

$\ln \left(0.8\right)=\ln \left(\left(\frac{1}{2}\right)^{\frac{t}{5730}}\right)$

$t=-\frac{5730\ln \left(0.8\right)}{\ln \left(2\right)}$

$t=1844.6479$

So,

An old bone contains 80% of its original carbon-14 in 1844.6479 years

4 0

3 years ago

Read 2 more answers

Solve the system of equations.

sasho [114]

Step-by-step explanation:

y = x² - 3x + 6

y = 2x + 6

y = y

x² - 3x + 6 = 2x + 6

x² - 5x = 0

x(x - 5) = 0

x = 0 and x = 5

y = 2x + 6 and y = 2x + 6

y = 2(0) + 6 and y = 2(5) + 6

y = 0 + 6 and y = 10 + 6

y = 6 and y = 16

(x1,y1) and (x2, y2) = (0,6) and (5,16)

Option → A

8 0

3 years ago

Alfred delivers two power of ten newspapers every week. How many newspapers does Alfred deliver in 14 weeks.

posledela

Answer:

14, 336 newspapers

Step-by-step explanation:

If he delivers 2^10 newspapers every week that will be 1,024 newspapers. In 14 weeks he'll deliver:

1,024 × 14 = 14, 336 newspapers

8 0

3 years ago