3 years ago

Find a • b if a=3i+8j and b=-0.5-4j

Mathematics

2 answers:

Marina CMI [18]3 years ago

6 0

Answer: -8j + 3i

Step-by-step explanation:

3i + 8j · (- 0.5) - 4j

3i-8j · 0.5 - 4j

3i-4j-4j

3i-8j

-8j+3i

Hope this helps

AnnZ [28]3 years ago

6 0

Answer:

−1.5i−12ij−4j−32j2

Step-by-step explanation:

You might be interested in

7x = -67 - 11v<br> 5x = -73 - 11v

Burka [1]

Answer:

x = 3, v = -8

Step-by-step explanation:

Substitute x.

$\frac{-67-11v}{7}$

[5 • $\frac{-67-11v}{7}$ = -73 - 11v]

Isolate v.

5 $\frac{-67-11v}{7}$ = -73 - 11v

v = -8

Substitute v.

x = $\frac{-67-11(-8)}{7}$

x = 3

4 0

2 years ago

Melissa and Tomas are playing a game with complex numbers. If Melissa has a score of 5 – 4i and Tomas has a score of 3 + 2i, wha

erastovalidia [21]

Answer:

8 - 2i

Step-by-step explanation:

Just add the real parts together and then add the imaginary parts together

5 + 3 = 8

-4i + 2i = -2i

8 - 2i

3 0

2 years ago

What is the value of 2x^2 - 4x + 5 when x is -3

IgorLugansk [536]

Answer:

Step-by-step explanation:

2x9+12+5=35

4 0

2 years ago

What unit do we use to measure angles??

Katarina [22]

Degrees (not like celsius or temperature though)

7 0

3 years ago

Read 2 more answers

At a coffee shop 55% of customers buy a coffee drink, 30% buy food, and 25% buy both coffee and food. What is the probability th

svetoff [14.1K]

Answer:

85%

Step-by-step explanation:

with OR (as opposed to AND), you add probabilitites

with AND, you multiply them

P(coffee OR food) = .55 + .30 = .85

6 0

2 years ago