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juin [17]
3 years ago
9

Find the digit that makes _2,530 divisible by 9 a.6 b.5 c.7 d.8

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
3 0
The answer would be: 8

All you need to do is count the sum of the digits and see if is divisible by nine. 
8 + 2 + 5 + 3 + 0 = 18

18 is divisible by 9. 

Thus, 8 makes 82,530 divisible by 9. 
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If,
lora16 [44]

Answer

What is the question?

Explanation

Thanks for the free points

Have a great day/night ❤

6 0
3 years ago
What happens to the value of the expression 80-2r as r decreases?
Ghella [55]

Answer:The value of the expression increases as r decreases.

Step-by-step explanation:

To find : What happens to the value of the expression as r decreases?

Given Expression: 80-2r

We check for different value of r as decreasing order,

r        80-2r

5        80-10=70

4        80-8=72

3        80-6=74

2        80-4=76

1         80-2=78

As r decreases the value of expression increases.

Therefore, the value of the expression increases as r decreases.

Hope this helps!

8 0
3 years ago
Read 2 more answers
Solve this system of equations using the graphing method please<br><br> y=-1/3x+5 <br> y=-2x
Marizza181 [45]
Graph the equations and locate the intersection.
(-3,6)

5 0
3 years ago
9 friends are lining up. Joe, Susan, John, and Meredith must be beside each other. How many ways can they line up?
ZanzabumX [31]
<h3>Answer:  17,280</h3>

This is one single number slightly over 17 thousand.

You may need to erase the comma when typing the answer in.

=========================================================

Explanation:

Let's say that another person steps in for Joe, Susan, John, and Meredith. I'll refer to this person as the teacher (perhaps these 9 friends are students on a field trip).

The 9 friends drops to 9-4 = 5 people when those four named people leave the group temporarily. Then it bumps up to 5+1 = 6 people when the teacher steps in. Wherever the teacher is located, the four friends that left will replace the teacher. This guarantees that those four friends stick together.

There are 6! = 6*5*4*3*2*1 = 720 ways to arrange those 6 people. The exclamation mark is a factorial symbol.

Within any of those 720 permutations, we have 4! = 4*3*2*1 = 24 ways to arrange those group of named people when they come back to replace the teacher.

So overall the answer is 4!*6! = 24*720 = 17,280

You may need to erase the comma when typing the answer in.

-------------

Side note: There are 9! = 362,880 ways to arrange all nine friends regardless if those four mentioned people stick together or not. We see that they stick together roughly (17,280)/(362,880) = 0.0476 = 4.76% of the time.

6 0
3 years ago
The landscaper pours 200 gallons of herbicide in a pond. The herbicide degrades 10% each week. How much will be in the pond afte
weeeeeb [17]

Answer:

180 gallons

Step-by-step explanation:

200 gal

10% = .10

200 x .10 = 20

200 - 20 = 180


5 0
3 years ago
Read 2 more answers
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