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erastova [34]
3 years ago
14

Please help!!!

Mathematics
1 answer:
exis [7]3 years ago
7 0
1) the answer is 2, 12 - 4x = 2x, x=2.
2) x + (x+5) = 17, 2x = 12, x=6.
3) x + (3x-60) = 1220, 4x = 1280. So Fred, x, made $320. Frank made $900.
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Ashley has 20 pieces of candy in a bag: 2 mint sticks, 4 jelly treats, and 14 fruit tart chews. If she eats one piece every 8 mi
AleksAgata [21]
The probability that her first treat is jelly is 4/20. Since she eats the candy and does not replace it, the probability the second treat is jelly would be 3/19 (1 less jelly and 1 less total candies). You would then multiply (4/20) by (3/19). That is your answer.
3 0
3 years ago
Military radar and missile detection systems are designed to warn a country of enemy attacks. A reliability question deals with
Nadusha1986 [10]

Answer:

Step-by-step explanation:

Given that a particular detection system has a 0.83 probability of detecting a missile attack.

Also each system is independent of the other to detect missile attack.

a)  the probability that a single detection system will detect an attack=0.83

b) the probability that at least one of the systems will detect the attack given two systems= 1-Prob no system detects

=1-(1-0.83)(1-0.83)\\\\=1-0.0289\\=0.9711

c)  If three systems are installed,  the probability that at least one of the systems  will detect the attack

= 1- none of the three systems detect attack

= (1-0.17^3)\\=1-0.004913\\=0.995087

d) We find that probability of detecting is more if we increase the system form 1 to 2 and 2 to 3.

Hence for safety and defence purpose multiple detection system is recommended.

7 0
3 years ago
yesterday Kate and her cousin Robert went out for a movie. there they spent $50 in total. Robert spent $10 more than kate. how m
antoniya [11.8K]

<em>while the two were at the movies Katie spent $40.00</em>

6 0
3 years ago
Plz help me
mamaluj [8]

Step-by-step explanation:

2) 212*198 = 41 976

1) 80-37 = 43

4 0
3 years ago
Read 2 more answers
Is my answer right. Or should I change my answer so I can get a higher grade
Shkiper50 [21]
The answer is “No” because the line is not proportional.
8 0
3 years ago
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