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Lubov Fominskaja [6]
4 years ago
7

If f(x) = x² + x - 4, evaluate f(2i).

Mathematics
1 answer:
Ganezh [65]4 years ago
4 0

Answer:

-6+2i

Step-by-step explanation:

f(2i)=2i^2+2i-4

2i^2 is -2 because i^2 is-1, times 2 is -2.

Therefore, the equation becomes -2+2i-4, leaving the answer of -6+2i.

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Eight times the sum of a number and six is 80
Pachacha [2.7K]

8*(n+6)=80

distribute

8n+48 = 80

subtract 48 from each side

8n = 32

divide by 8

n=4

6 0
3 years ago
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Answer:

D) I’m 100% sure it’s correct!

Step-by-step explanation:

4 0
3 years ago
The math department sponsors a Math Family Fun Night each year. In the second year, there were 54 people present. In the fourth
Tamiku [17]

Answer:

y = 23x  + 8

Step-by-step explanation:

Assuming the situation can be modelled using a linear equation, then the line must pass through the point (2,54) and (4,100).

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7 0
3 years ago
Is this expression a monomial, binomial, or trinomial?
Verdich [7]
C. monomial because xy is only one number and not two.  
8 0
4 years ago
1 1/4 divided by 1 2/5
Degger [83]

Answer:

25/28

Step-by-step explanation:

1 1/4=5/4

1 2/5=7/5

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

(5/4)/(7/5)

(5/4)(5/7)

25/28

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