3 years ago

How to solve the linear systems by graphing y = 5 x= -2

Mathematics

1 answer:

seropon [69]3 years ago

3 0

You will graph the line and where ever the line is cross there is a solution.

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5k-7=-7<br> solve the equation to what is k

LenKa [72]

So 5k-7=-7
You need to do the opposite of addition,which is subtraction so...
5k-7=-7
+7
__
K=0
and to double check it,replace the (or variable) with our answer (0)...
so
5×0-7=-7
solve the problem...and
-7=-7√

5 0

4 years ago

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There is a bag filled with 4 blue and 5 red marbles. A marble is taken at random from the bag, the colour is noted and then it i

DIA [1.3K]

Answer:

16.67% probability of getting 2 blues

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

The order in which the marbles are selected is not important. So we use the combinations formula to solve this question.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

What is the probability of getting 2 blues?

Desired outcomes:

Two blue marbles, from a set of 4.

$D = C_{4,2} = \frac{4!}{2!(4-2)!} = 6$

Total outcomes:

Two marbles, from a set of 9.

$T = C_{9,2} = \frac{9!}{2!(9-2)!} = 36$

Probability:

$p = \frac{D}{T} = \frac{6}{36} = 0.1667$

16.67% probability of getting 2 blues

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3 years ago

The sum of two numbers is five times their difference. If one number exceeds the other by 7, find the numbers.

Vaselesa [24]

Hello here is a solution :

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3 years ago

If magazines cost $0.50 each, how much will 3 magazines cost?

denis23 [38]

What you want to do is do:

0.5 + 0.5 + 0.5 to find how much 3 magazines are.

So, three magazines cost $1.50

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4 years ago

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Hello there, the correct answer is:

C.

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