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Georgia [21]
2 years ago
13

Can someone help me?2b²+17b+21Thanks​

Mathematics
2 answers:
vladimir1956 [14]2 years ago
6 0

Answer:

(2b+3) (b+7)

Step-by-step explanation:

2b²+17b+21

2b²+14b+3b+21

2b(b+7) + 3(b+7)

(2b+3) (b+7)

sveticcg [70]2 years ago
5 0

Answer:

roots are -3 and -14

Step-by-step explanation:

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Inverse of m(x)=2x^2-6
romanna [79]
m(x)=2x^2-6\to y=2x^2-6\ \ \ \ |add\ 6\ to\ both\ sides\\\\2x^2=y+6\ \ \ \ \ |divide\ both\ sides\ by\ 2\\\\x^2=\dfrac{y+6}{2}\ \ \ \ |sqare\ root\ both\ sides\\\\x=\sqrt{\dfrac{y+6}{2}}\\\\Answer:\boxed{m^{-1}(x)=\sqrt{\frac{x+6}{2}}\ for\ x\geq-6}
6 0
3 years ago
9. Determine whether or not the number 257 is prime.
Sladkaya [172]

Answer:

257 is prime.

Step-by-step explanation:

To evaluate if a number is prime, we just need to evaluate it for the prime numbers that are equal or lesser than the said number's square root.

In this case, √257 = 16.03 so we just need to see if 257 is divisible by <u>2, 3, 5, 7, 11 and 13</u> (the prime numbers that come before 16)

  • 257 is odd, so it is not divisible by 2.
  • The sum of its digits is 14, therefore, it is not divisible by 3.
  • 257 ends in 7, therefore it's not divisible by 5.
  • 257/ 7 = 36.71 so it's not divisible by 7.
  • 257/ 11 = 23.36 so it's not divisible by 11
  • Finally 257 / 13= 19.76 so it's not divisible by 13.

Therefore, 257 is prime.

7 0
3 years ago
HELP ME ASAP PLEASE?!?!
miss Akunina [59]
A True

Congruent means to have the same shape and size or when we can cut them out and then match them up completely.
3 0
3 years ago
Read 2 more answers
need a lot of help
marishachu [46]
2.60 x 12 3/4

2.60 x 12.75 (convert to decimal)

= $33.15, which is not listed.
3 0
2 years ago
The above is a a a a a a a a a a a a a a a a a a a
Reptile [31]

X f πxf

-1 2 -2

3 1 3

-1 -2 2

0 -3 0

total =3

mean (π)=πxf ÷n

= 3÷4

= 0.75 these is not answer I thank so

3 0
3 years ago
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