Question

there are 3question only​

Answer 1

Step-by-step explanation:

total cards = 52

a card is drawn

probability of red card = outcomes of red card / total outcomes

= 4 / 52 = 1 / 13

face card = 12 / 52 = 3 / 13

a spade = 13 / 52 = 1/ 4

answar of 3rd question.

using Cramer rule

5x + 3y =- 11

X + 2y = - 5

a = 5 b = 3 e = - 11

c = 1 d = 2 f =- 5

det A = ad - bc = 10 - 3 = 7

x = constant. y y = x. constant

-11. 3. 5. -11

-5. 2. 1. - 5

______________. _____________

detA = 7. 7

x =- 22 + 15 y = - 25 + 11

________. _________

7 7

x. = - 7 / 7 = - 1 y = - 14 / 7 = - 2

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