The diameter of a circle is 13 in. Find the circumference to the nearest tenth.

How do I go about solving this?

Mama L [17]

Answer:

you want to bring down the numbers.. so try 3 for the second one

Step-by-step explanation:

8 0

3 years ago

1/4k = 3 (-1/4k + 3)

Arada [10]

Answer:

For the expression $\frac{1}{4} k = 3 (-\frac{1}{4}k +3)$

k = 9 is the required solution.

Step-by-step explanation:

Here, the given expression is $\frac{1}{4} k = 3 (-\frac{1}{4}k +3)$

Solving the above expression for k, we get:

$\frac{1}{4} k = 3 (-\frac{1}{4}k +3) \implies \frac{k}{4} = (\frac{-3}{4}k) + 9$

or, $\frac{k}{4} + (\frac{3}{4}k) = 9 \implies \frac{k + 3k}{4} = 9$

or, $\frac{4k}{4} = 9 \implies k =9$

or, k = 9

Hence for the expression $\frac{1}{4} k = 3 (-\frac{1}{4}k +3)$

k = 9 is the required solution.

8 0

3 years ago

The discriminant of a quadratic equation is 40. What is the nature of solutions?

RSB [31]

Answer:

It means that the roots of the quadratic equation are real and distinct

Step-by-step explanation:

Here, given the discriminant of the quadratic equation, we want to find out the nature of the solutions.

Mathematically, we can use to determine the nature of the discriminant.

By it’s formula;

D = b^2 - 4ac

We can see that the given discriminant 40 is a positive value. What this means is that the quadratic equation has roots which are real and are distinct

4 0

4 years ago

Find the coordinates of the missing endpoint if P is midpoint of NQ

Annette [7]

So wat are the answer choices

6 0

3 years ago

How many 4-letter passords can be made using the letters A thought Z if...

mezya [45]

Answer:

a.)The total 4-letters passwords when repetition of letters is allowed are 456976

b.)The total 4-letters passwords when repetition of letters is not allowed are 358800

Step-by-step explanation:

Some situations of probability involve multiple events. When one of the events affects others, they are called dependent events. For example, when objects are chosen from a list or group and are not returned, the first choice reduces the options for future choices.

There are two ways to sort or combine results from dependent events. Permutations are groupings in which the order of objects matters. Combinations are groupings in which content matters but order does not.

How many 4-letter passwords can be made using the letters A throught Z if...

a)Repetition of letters is allowed?

There are only 26 possible values for each letter of the password (The English Alphabet consists of 26 letters). The total 4-letters passwords when repetition of letters is allowed are $26^{4} =456976$

b) Repetition of letters is not allowed?

If repetition of letters is not allowed, we can only choose 4 letters out of 26. Using the permutation equation $nP_{k} =\frac{n!}{(n-k)!}$

The total 4-letters passwords when repetition of letters is not allowed are $26P_{4} =\frac{26!}{(26-4)!}=26.25.24.23=358800$

.

7 0

3 years ago