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olganol [36]
3 years ago
11

What's (9+9i)(-1-5i) using foil method

Mathematics
1 answer:
hammer [34]3 years ago
5 0

Answer:

36-54i

Step-by-step explanation:

(9+9i)(-1-5i)

v

-9-9×5i-9i-9i×5i

v

-9-45i-9i-45i^2

v

-9-45i-9i-45×(-1)

v

(-9)-45i-9i+(45)

v

36(-45i)(-9i)

v

36-54i

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A and B play a game in which they alternately toss a pair of dice. The one who is first to get a total of 7 wins the game. Find
kompoz [17]

Answer: the probability that the first toss wins is:

P = 1/6 or 0.1667

Step-by-step explanation:

A die has six sides (that is 6 outcome per die)

For a pair of dice:

The Total number of possible outcomes = 6 × 6 = 36

The possible outcomes of 7 is:

(1,6),(2,5),(3,4),(4,3),(5,2),(6,1)

= 6

The probability P of getting 7 is:

P = number of possible outcomes of 7/total number of possible outcomes

P = 6/36 = 1/6

The probability that the first toss wins

P = 1/6 or 0.1667

3 0
3 years ago
Hassan is cooking some rice the recipe says he needs 450 grams of rice for 6 people.how many kilograms of rice would he need for
gregori [183]

Answer:

so if we take 450 an divide it by 6 you get 75. So take 75 times 18 and you get 1,350 so he would need 1,350 kilograms of rice for 18 people

Step-by-step explanation:

hope this helps :D

4 0
2 years ago
The sum of two numbers is –40. One number
sasho [114]

Answer:

-27 + -13 = -40

Step-by-step explanation:

3 0
3 years ago
Find the value of x (URGENT/GIVING BRAINLIEST)
alexira [117]

Answer:

D. 24

Step-by-step explanation:

Angles are the same, so 84 = 3x.

To get x alone, you divide 3 by both sides.

84/3 = 24

24 = x.

6 0
3 years ago
Write the equation of a line that passes<br> through (-3,-8) and (3, 10).
Xelga [282]

Answer:

y=3x+1

Step-by-step explanation:

The equation will most likely be in slope-intercept form which is

y=mx+b

(m) is the slope,

(b) is the y intercept

First we must find the slope. The formula for slope is (y1-y2)/(x1-x2)

Which means we take the (y) of the second given point and subtract the (y) if the first given point, then divide that by the (x) of the second given point minus the (x) of the first given point.

(10-(-8)/3-(-3)

18/6

Simplify

3/1

3, our slope is 3.

Now we can put this into our formula

y=3x+b

To find the y intercept we just apply one of the given points. (I'll use (3, 10) but either of them would work.

10=3(3)+b

Now solve

10=9+b

Subtract 9 from each side

1=b

Now we put our slope and y intercept into our formula

y=3x+1.

Hope this helps! If you have any questions on how I got my answer feel free to ask. Stay safe!

3 0
3 years ago
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