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3 years ago

If you have a 2 in the tens place what would you need in the ones place to make 31

Mathematics

1 answer:

Westkost [7]3 years ago

6 0

Answer:

Step-by-step explanation:

2(10)+1(n)=31

20+n=31

n=31-20

n=11

Since the highest possible value for n is 9, there is no way to make 31 if 2 is in the tens column.

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Consider Akelia’s sequence 5, 8, 11, 14, 17, ….

bonufazy [111]

Answer:

It would be 20

Step-by-step explanation:

As we can see, the sequence starts from 5 and increases by three each time. In fact, one possible formula for that sequence could be:

$a_n=3n+2\hspace{10}n\in N$

Let's confirm the formula by evaluating the first 6 terms:

$a_1=3(1)+2=3+2=5\\a_2=3(2)+2=6+2=8\\a_3=3(3)+2=9+2=11\\a_4=3(4)+2=12+2=14\\a_5=3(5)+2=15+2=17\\a_6=3(6)+2=18+2=20$

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3 years ago

Factor:<br> 4b2 - 12b + 9

Vikentia [17]

Answer:

(2b-3)²

Step-by-step explanation:

The square of a binomial is ...

(p - q)² = p² - 2pq + q²

The fact that the first and last terms are perfect squares suggests that you might want to look to see if the middle term matches this form. It does.

For p² = 4b², p=2b.

For q² = 9, q = 3.

Then 2pq = 2(2b)(3) = 12b.

So, the factoring is ...

4b² -12b +9 = (2b -3)²

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4 years ago

jack obtains a loan of $4815.16 at 2.3% ordinary interest for 42 days. what is the maturity value of the loan

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The maturity value is 4827 and if needed interest value is 12.

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4 years ago

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3 years ago

Factor x3-2x2-9x+18 completely if(x+3) is a factor

Charra [1.4K]

Factor x^3 -2x^2-9x+18

= x^2(x - 2) - 9(x - 2)

= (x^2 - 9)(x -2)

= (x + 3 )(x - 3)(x - 2)

So (x+3) is a factor

6 0

4 years ago

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If you have a 2 in the tens place what would you need in the ones place to make 31​

If you have a 2 in the tens place what would you need in the ones place to make 31