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Burka [1]
3 years ago
11

Perform the indicated operation and write the result in the form a + bi. i(5 - i) + 2i (i + 6) the

Mathematics
2 answers:
Nikitich [7]3 years ago
8 0

i(5 - i) + 2i (i + 6) =

distribute

5i - i^2 +2i^2 +12i

5i - (-1) +2 (-1) +12i

5i +1 -2 +12i

-1+17i

tresset_1 [31]3 years ago
7 0

Answer:

a.-3+7i

Step-by-step explanation:

just calculated should be aight

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A ballplayer catches a ball 3.4s after throwing it vertically upward. with what speed did he throw it, and what height did it re
Daniel [21]

From the equation of motion, we know,

s=ut+\frac{1}{2}at^{2}

Where s= displacement

u= initial velocity

a= gravitational force

t= time

Displacement is 0 since the ball comes back to the same point from where it was thrown.  

A = -9.8m/s^{2} since the ball is thrown upwards.

Plug the known values into the equation.

=> 0=u\left ( 3.4 \right )+\frac{1}{2}\left ( -9.81 \right )(3.4^{2})

Solving for u gives :

u= 16.67 m/ sec ....... equation (1)

At maximum height, final velocity i.e v is 0

Time take to reach the top = \frac{3.4}{2} = 1.7 sec

v^{2}=u^{2}+2as

=> 0=(16.67)^{2}+2(-9.81)(s)

Solving for s we get

s= 14.16 m


4 0
3 years ago
Solve the following equation using the quadratic formula.
nataly862011 [7]

Answer:

x=3.5,x=-6

I hope this help

7 0
2 years ago
The 12 boys in the class make up 15% of the class. What is the total number of students in the class?
alina1380 [7]

Answer:

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Step-by-step explanation:

12/80 is 0.15 or 15%

5 0
2 years ago
What is?...<br><br> 18 1/7 - 11 5/6
Daniel [21]
18+1/7-(11+5/6)
=18-11+1/7-5/6
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2 years ago
Please i need help it’s urgent
777dan777 [17]

Answer:

4.5

Step-by-step explanation:

6x + 42 = 18x - 12 (alternate angles)

or, 18x - 6x = 42+12

or, 12x = 54

or, x = 54/12

x= 4.5

8 0
3 years ago
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