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Lina20 [59]
2 years ago
15

4. Mary has 21 coins whose total value is Kshs. 72. There are twice as many five

Mathematics
1 answer:
Stells [14]2 years ago
6 0

Answer:

Mary has  

3 10

shilling coins.

Step-by-step explanation:

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A coin is loaded so that the probability of heads is 0.55 and the probability of tails is 0.45. suppose the coin is tossed twice
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I need to show work and Idk how for 2 or 3. The -5,-2 and 8,3 is the answers just need work shown thanks
prisoha [69]
#2
2x - 4y = -2
2x + 3y = -16
------------------subtract
-7y = 14
y = 14/-7
y = -2

2x - 4y = -2
2x - 4(-2) = -2
2x + 8 = -2
2x = -2 -8
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answer x = -2 and y = -5

check:

2(-5)- 4(-2) = -2
-10 +8 = -2
-2 = -2.....true

2x + 3y = -16
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-10 + (-6) = -16
-16 = -16...true


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2 years ago
Please simplify these expressions
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Step-by-step explanation:

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