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sweet-ann [11.9K]
3 years ago
13

If 6 is {2\over 5} of a number N,then N=

Mathematics
1 answer:
Alex3 years ago
8 0

Answer:

15

Step-by-step explanation:

set up the equation 2/5n=6 and solve for N by dividing each side by 2/5, which is also multiplying each side by 5/2. n=15

check by substituting 15 in for N.

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How many four letter permutations can be formed from the first five letters of the alphabet?
Maru [420]

Answer:   120

<u>Step-by-step explanation:</u>

Permutation means that order matters.

_nP_r = \dfrac{n!}{(n-r)!}\quad \text{where n is the total \# of items and r is the quantity chosen} \\\\\text{In the given problem, n = 5 and r = 4}\\\\\\_5P_4=\dfrac{5!}{(5-4)!} = \dfrac{5\times 4\times 3\times 2 \times 1}{1}=120

8 0
3 years ago
Need help and will be giving Brainliest
Katena32 [7]

Answer:

x-intercept (s):

For this case h (x) = 0

x2 - 2x - 8 = 0

(x-4) * (x + 2) = 0

x1 = 4

x2 = -2

y-intercept:

For this case x = 0

h (0) = (0)2 - 2 (0) - 8

h (0) = - 8

vertex:

We derive the equation:

h '(x) = x2 - 2x - 8

h (x) = 2x - 2

We match zero:

2x-2 = 0

x = 2/2

x = 1

We evaluate the function for x = 1

h (1) = (1)2 - 2 (1) - 8

h (1) = 1 - 2 - 8

h (1) = -9

The vertex is:

(1, -9)

axis of symmetry of the function:

x = 1

Step-by-step explanation:

hope it helps

6 0
3 years ago
(a+b)^2*(a-b)<br> please answer me fast ​
kondaur [170]

Answer:

a^3b + 2a^2b^2 + ab^3

Step-by-step explanation:

(a+b)^2

= a^2 + 2ab + b^2

ab(a^2 + 2ab + b^2)

= a^3b + 2a^2b^2 + ab^3

5 0
2 years ago
Will give brainliest
Sedaia [141]

Answer:

I think its A.

Step-by-step explanation:

3 0
3 years ago
Which is better to buy 12 bars of soap for $10.00 or 5 bars of soap for $4.00? Write each rate
timurjin [86]

It would be better to buy 12 bars for 10 dollars and the rate would be $1.2. The rate for 5 bars would be $1.25.

5 0
3 years ago
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