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4 years ago

What is 2 2/3 divided by 13/20

Mathematics

1 answer:

snow_lady [41]4 years ago

6 0

Answer:

4.10256410256

Step-by-step explanation:

That's what I got out of my calculator

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If x and y are two numbers that satisfy both the linear equations y=x+12 and 2x+y=18, then y=?

Sladkaya [172]

Then y = 14.

___
The (x, y) values that satisfy both equations are (2, 14).

6 0

4 years ago

Evaluate 7P4 Evaluate 12C5

Verdich [7]

Answer:

Below.

Step-by-step explanation:

7P4

= 7! / (7-4)!

= 7*6*5*4*3*2*1 / ( 3*2*1)

= 7*6*5*4

= 840.

12C5

= 12! / (12-5)! 5!

= 12*11*10*9*8*7*6*5*4*3*2*1 / ( 7*6*5*4*3*2*1 * 5*4*3*2*1)

= 12*11*10*9*8 / 5*4*3*2*1

= 792.

5 0

3 years ago

Directions: Indicate the FOIL for the problem: (3x-2)(2x-3) First

MrRissso [65]

Answer:

$6x^{2} +9x -4x+6\\$

Step-by-step explanation:

First you take 3x times 2x since its the first of both equations, which will give you 6x squared.

Then take the outer ones of both problems which is 3x times 3 which is 9x.

Then the inner, -2 times 2x which is -4x

Then the last of both individual problems which is -2 times -3 which is positive 6.

8 0

2 years ago

Please help Find the difference (5ab-7a-9) - (8ab-2)

Rudiy27

(5ab-7a-9) - (8ab-2)
5ab - 7a - 9 - 8ab + 2
-3ab -7a -7

7 0

3 years ago

Find the half life of a substance which decays according to the function A(t)=600e^-0.05t, where t is time in days. Round to the

Pavel [41]

Answer:

14 days

Step-by-step explanation:

The half life of a substance is the time required until the object has only half of the inicial mass.

So, to find the inicial mass of the object, we use t = 0 in the equation A(t):

A(0) = 600*e^0 = 600

Half of this mass is 300, so we can use A(t) = 300 and then find the time:

300 = 600e^-0.05t

e^-0.05t = 0.5

ln(e^-0.05t) = ln(0.5)

-0.05t = -0.6931

t = 13.862 days

Rounding to nearest day, we have that t = 14 days

8 0

4 years ago