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-BARSIC- [3]
3 years ago
15

Explain how numbers with a 5 in the ones place are not prime numbers

Mathematics
2 answers:
aleksandrvk [35]3 years ago
7 0
Because they will always be divisible by 5
gtnhenbr [62]3 years ago
5 0
Those numbers will all be divisible by 5
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The least common multiple of two numbers is 3780, and the greatest common divisor is 18. given that one of the numbers is 180, w
garri49 [273]
<span>To solve these GCF and LCM problems, factor the numbers you're working with into primes: 
3780 = 2*2*3*3*3*5*7
180 = 2*2*3*3*5 
</span><span>We know that the LCM of the two numbers, call them A and B, = 3780 and that A = 180. The greatest common factor of 180 and B = 18 so B has factors 2*3*3 in common with 180 but no other factors in common with 180. So, B has no more 2's and no 5's
</span><span>Now, LCM(180,B) = 3780. So, A or B must have each of the factors of 3780. B needs another factor of 3 and a factor of 7 since LCM(A,B) needs for either A or B to have a factor of 2*2, which A has, and a factor of 3*3*3, which B will have with another factor of 3, and a factor of 7, which B will have. 
So, B = 2*3*3*3*7 = 378.</span>
8 0
3 years ago
A store buys 17 sweaters for $204 and sells them for $646. how much profit does the store make per sweater?
uranmaximum [27]

Total profit: 646 - 204 = 442


profit per shirt = 442 / 17 = 26


Answer: $26

6 0
2 years ago
10g - 4 (g - 2) + 11 = 1
sergij07 [2.7K]

Answer:

g = -3

Step-by-step explanation:

10g-4(g-2)+11=1

1) 10g-4g+8+11=1  Combine like terms

2) 6g+8+11=1

3) 6g+19=1

4) 6g=-18   To continue the process of getting the variable by itself, we have to get rid of 19. So we are going to subtract 19 from 19 to get 0, and whatever we do to the other side, so we subtract 19 from 1 to get -18.

5)6g=-18    To get the variable by itself, instead of mutiplying, we will divide by 6 on both sides to get... g=-3! Hope this helps!

5 0
3 years ago
What are the solutions to x2 + 8x + 7 = 0?
nikitadnepr [17]

Answer:

x= -1 and x= -7

hope it helps.

5 0
3 years ago
The sum of three consecutive integers is 5 more than the least of the integers. Find the integers.
a_sh-v [17]

Answer:

1, 2, 3

Step-by-step explanation:

1 + 2 + 3 = 6 and 6 is 5 more than 1. Hope this helps!

7 0
3 years ago
Read 2 more answers
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