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Colt1911 [192]
3 years ago
15

There are 9 students in a class: 7 boys and 2 girls.

Mathematics
1 answer:
Crank3 years ago
6 0

Answer: 9/7

Step-by-step explanation:

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A geologist in South America discovers a
diamong [38]

Answer:

This is a radioactive decay / half-life problem.

Initial amount of C 14 = 100% Present Amount = 57%

k = .0001  (that value should be negative)

Nt = No * e^ (k*t)

You need to solve that equation for "time" (equation attached)

time = natural log (Ending amount / Starting Amount) / k

time = natural log (57% / 100%) / -.0001

time = ln (.57) / -.0001

time = -.56211891815 / -.0001

time = 5,621.2 years    (age of the bird skeleton)

These problems are quite complicated but I think I know this pretty well.

Need to know more? Visit my website (it's on the graphic).

Step-by-step explanation:

7 0
3 years ago
An animal shelter has 45 cats, 10 dogs and 5 rabbits. the shelter published the ratio of cats to dogs in its latest newsletter .
timurjin [86]
Ratio : cats:dogs 45:10
6 0
3 years ago
Given A(-3, 4), B(0, 1), and C(4,2), reflect as follows: Ry-axis(ABC). What is B​
lions [1.4K]
That’s answer is A)-3,4) because you reflect as follows
6 0
2 years ago
What would the answer be???
Korolek [52]

Answer:

The solution is obtained by adding the two equations.

The solution is: (x, y) = ($ - \frac{2}{3} $, $ - \frac{7}{3} $)

Step-by-step explanation:

We are given two equations with two variables. The strategy is to eliminate one variable and solve for both the variables.

The two equations are:

$ 7x + y = - 7 \hspace{15mm} \hdots (1) $

$ 2x - y = 1 \hspace{15mm} \hdots (2) $

Adding both the equations, we get:

$ 7x + 2x + y - y = - 7 + 1 $

$ \implies 9x = - 6 $

$ \implies x = - \frac{2}{3} $

Substituting the value of 'x', we get the value of y.

We substitute in (2). [Can be substituted in any equation].

We get: y = 2x - 1

$ \imples y = 2\bigg(\frac{-2}{3}\bigg) - 1 $

$ \implies -\frac{4}{3} - 1 $

$ \implies y = -\frac{7}{3} $

So, we get the corresponding values of x and y which is the solution of the two equations.

4 0
3 years ago
Use the data to find the lower quartile value.
grandymaker [24]

Answer:$9.75

Step-by-step explanation:

6 0
3 years ago
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