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Tresset [83]
3 years ago
11

Last year the chess club had 40 members.this year the club has 30 members.find the percent of decrease in the number of members

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
8 0

There is a 25% decrease

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Help please with algebra
KIM [24]

Answer:

c,d

Step-by-step explanation:

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4 0
2 years ago
Which inequality represents the statement? The ages (a) of s group of travelers all exceeded 17 years and were no more then 54 y
klasskru [66]

Answer:

The inequality that represents the age of the group, "x", is: 17 < x \leq 54

Step-by-step explanation:

To express this problem in an inequality we will attribute the age of the members on the group with the variable "x". There are two available information about "x", the first states that every member of the group is older than 17 years, therefore we can create a inequality based on that:

x > 17

While the second data from the problem states that none of than is older than 54 years old, this implies that they can be at most that old, therefore the inequality that represents this is:

x\leq 54

In order for both to be valid at the same time x must be greater than 17 and less or equal to 54, therefore we finally have:

17 < x \leq 54

7 0
2 years ago
What is equivalent to<br> (6x+4y)-2y
Advocard [28]

Answer:

if the question is (6x+4y) -  2y

6x+2y or 3x+y

but if its (6x+4y)(-2y)

-6xy+(-8y)

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Identify a possible first step using the elimination method to solve the system and then find the solution to the system. 2x − 5
tatuchka [14]

In order to use the elimination method, we have to multiply the equation by some number, so that one of the variable has the same coefficient.

For example, multiplying the first equation by 3 and the second by 2 gives the following, equivalent system:

\begin{cases}6x-15y=33\\6x+4y=14\end{cases}

Now, we can subtract the two equations, and we will cancel (eliminate) the x variable:

-19y=19 \iff y=-1

Now that y is known, plug it into one of the equations: for example, if we use the first one we get

2x+5 = 11 \iff 2x = 6 \iff x=3

6 0
3 years ago
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Suppose you have 5 riders and 5 horses, and you want to pair them off so that every rider is assigned one horse (and no horse is
maw [93]

There are 120 ways in which 5  riders and 5 horses can be arranged.

We have,

5 riders and 5 horses,

Now,

We know that,

Now,

Using the arrangement formula of Permutation,

i.e.

The total number of ways ^nN_r = \frac{n!}{(n-r)!},

So,

For n = 5,

And,

r = 5

As we have,

n = r,

So,

Now,

Using the above-mentioned formula of arrangement,

i.e.

The total number of ways ^nN_r = \frac{n!}{(n-r)!},

Now,

Substituting values,

We get,

^5N_5 = \frac{5!}{(5-5)!}

We get,

The total number of ways of arrangement = 5! = 5 × 4 × 3 × 2 × 1 = 120,

So,

There are 120 ways to arrange horses for riders.

Hence we can say that there are 120 ways in which 5  riders and 5 horses can be arranged.

Learn more about arrangements here

brainly.com/question/15032503

#SPJ4

7 0
2 years ago
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