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3 years ago

Help me plssssssss this is a math question

Mathematics

1 answer:

Flura [38]3 years ago

8 0

“My neighbor owns his own property” your book said non mathematical, but tell me if it’s supposed to be. I can write you a new one.

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PLEASE ANSWER ASASP<br> -5y + 4 = -11<br> what is y?

lorasvet [3.4K]

Answer:

Step-by-step explanation:

-5y + 4 = -11 Get rid of the numbers to get y alone.

-5y +4 minus 4 = -11 minus 4 Here you are removing the 4 from the left

-5y = -15 Now you will have to get rid of the -5

-5y/(-5) = -15/(-5)

y = 3

3 0

2 years ago

Read 2 more answers

he radioactive element carbon-14 has a half-life of 5750 years. A scientist determined that the bones from a mastodon had lost

elena-s [515]

Answer:

The bones were 12,485 years old at the time they were discovered.

Step-by-step explanation:

Amount of the element:

The amount of the element after t years is given by the following equation, considering the decay rate proportional to the amount present:

$A(t) = A(0)e^{-kt}$

In which A(0) is the initial amount and k is the decay rate, as a decimal.

The radioactive element carbon-14 has a half-life of 5750 years.

This means that $A(5750) = 0.5A(0)$ , and we use this to find k. So

$A(t) = A(0)e^{-kt}$

$0.5A(0) = A(0)e^{-5750k}$

$e^{-5750k} = 0.5$

$\ln{e^{-5750k}} = \ln{0.5}$

$-5750k = \ln{0.5}$

$k = -\frac{\ln{0.5}}{5750}$

$k = 0.00012054733$

$A(t) = A(0)e^{-0.00012054733t}$

A scientist determined that the bones from a mastodon had lost 77.8 % of their carbon-14. How old were the bones at the time they were discovered?

Had 100 - 77.8 = 22.2% remaining, so this is t for which:

$A(t) = 0.222A(0)$

Then

$0.222A(0) = A(0)e^{-0.00012054733t}$

$e^{-0.00012054733t} = 0.222$

$\ln{e^{-0.00012054733t}} = \ln{0.222}$

$-0.00012054733t = \ln{0.222}$

$t = -\frac{\ln{0.222}}{0.00012054733}$

$t = 12485$

The bones were 12,485 years old at the time they were discovered.

8 0

2 years ago

– 7р — 4 >26р – 94<br> I don’t understand how to solve, what is the answer?

pishuonlain [190]

Answer:

I don't know either but thanks for asking me

3 0

3 years ago

The coordinates of A, B,and C in the diagram are A(p,4), B(6,1), C(9,q). What equation correctly relates p and q?

murzikaleks [220]

I don't see any diagram. So, I'll just wing it.

Value of q:
p, 6, 9 ⇒ there is a difference of 3. The sequence increases by 3. So, it can be assumed that the p is equal to 3. A(p,4) ⇒ A(3,4)

Value of q:
4, 1, q ⇒ there is a difference of 3. The sequence decreases by 3. So, it can be assumed that q is equal to -2. C(9,-2)

p q
A 3 4 ⇒ 3 + 4 = 7
B 6 1 ⇒ 6 + 1 = 7
C 9 -2 ⇒ 9 + (-2) = 7

Notice that the sequence has an equation of p + q = 7.

7 0

2 years ago

Read 2 more answers

Help Me on this math equation

igomit [66]

Answer:

uhhhh what grade level is dis?

Step-by-step explanation:

4 0

1 year ago