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Oduvanchick [21]
2 years ago
9

using integer to describe the situation 12 protons and an atom blank 18 electrons around an atom blank​

Mathematics
1 answer:
Phantasy [73]2 years ago
4 0
Atoms and protons are tricking. they snicks and twix
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What is the product of all constants $k$ such that the quadratic $x^2 + kx +15$ can be factored in the form $(x+a)(x+b)$, where
Setler79 [48]

Answer:

k=-16,k=-8,k=8,k=16

Step-by-step explanation:

We are given quadratic equations as

x^2+kx+15

and it can be factored as

=(x+a)(x+b)

now, we can multiply factor term

(x+a)(x+b)=x^2+(a+b)x+ab

now, we can compare

x^2+(a+b)x+ab=x^2+kx+15

so, we get

k=a+b

ab=15

we are given that

'a' and 'b' are integers

so, we can find all possible factors

15=(-1\times -15),(1\times 15)

15=(-3\times -5),(3\times 5)

so, we can find k

At (-1\times -15):

k=a+b

we can plug values

k=-1-15

k=-16

At (1\times 15):

k=a+b

we can plug values

k=1+15

k=16

At (-3\times -5):

k=a+b

we can plug values

k=-3-5

k=-8

At (3\times 5):

k=a+b

we can plug values

k=3+5

k=8

So, values of k are

k=-16,k=-8,k=8,k=16

6 0
3 years ago
How do i do this????
PSYCHO15rus [73]
What you do is you combine like terms... so in your instance it is using m.
9m+2= 3m-10
-3m      -3m
3m + 2 =-10
        +10 +10
3m= 12
m= 4
8 0
3 years ago
yuson must complete 30 hours of community service. she does 2 hours each day. which linear equation represents the hours yuson h
algol [13]

Answer:

30-2x

Step-by-step explanation:

yuson has to finish am total of 30 hours in community service

she does 2 hours each day

in x days, hour of service done=2x

after x days hours of service left=30-2x

therefore the linear equation representing the hours yuson has left after x days is:

30-2x

6 0
2 years ago
Please help answer A and B
Goshia [24]

Answer:

the answer is A

Step-by-step explanation:

4 0
2 years ago
Heather writes the equations below to represent two lines drawn on the coordinate plane.
pentagon [3]
According to the represented datum, the correct answer is : equation has no solution; therefore, the system of equations has no solution because it is imposible <span> when girl should rich  0 = 60. 
I am pretty sure it helps! Do hope you will agree with me.</span>
6 0
2 years ago
Read 2 more answers
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