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4 years ago

If x-y=5 then how does y=-2x-4

1 answer:

3 0

Based on my knowledge, you’d set both equations equal to y, and then set both sides equal to each other then solve.

y=-5+x
y=-2x-4
-5+x=-2x-4
then solve from there

(this could be completely wrong, so don’t only go by my opinion)

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BRAINLIESTTT ASAP! PLEASE HELP ME :)

Kobotan [32]

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3 years ago

Permutations vs combinations(one step):

Bogdan [553]

Answer:

the expression is: $^{15}P_3=\frac{15!}{(15-3)!}$

and 2730 different ways are possible.

Step-by-step explanation:

In the given question we have to choose a president, vice

president, and secretary.

Permutations are used when order is important so, as in the given question order is required. We would use permutations

The formula used is: $^nP_r=\frac{n!}{(n-r)!}$ where:

n=total number of objects

r=number of objects selected

In our case: n=15, r=3

Putting values and finding the answer:

$^nP_r\\^{15}P_3=\frac{15!}{(15-3)!} =2730 \ ways$

So, the expression is: $^{15}P_3=\frac{15!}{(15-3)!}$

and 2730 different ways are possible.

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3 years ago

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makvit [3.9K]

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3 years ago

At the begging of the month a store had a balance of -554

makvit [3.9K]

What is the question? Do you mean "At the beginning of the month a store had the balance of $554"? If so, what is the question?

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4 years ago

−2(25)10x for x=15 URGENT PLS HELP

stepan [7]

Answer:

-7500

Step-by-step explanation:

Given: −2(25)10x

We need to find the value of the given expression at x = 15

So,

−2(25)10x = −2(25)10 * 15

Using the associative property

= (-2 * 25) * (10 * 15)

= -50 * 150

= -7500

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3 years ago