2 years ago

Find the value of x. help pls

Mathematics

1 answer:

AlexFokin [52]2 years ago

5 0

Answer:

Step-by-step explanation:

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A test to detect an infection gives a positive result 98% of the time if a person is infected. It is 97% accurate for people who

Rama09 [41]

If the test gives a positive result for an infected person 98% of the time, that means that 2% of the time, it gives a negative result for an infected person, which would be a false negative.

If the test is 97% accurate for non-infected people, that means that it gives a negative result 97% of the time. So a positive result will be given 3% of the time for non-infected people, which is a false positive.

6 0

2 years ago

Simplify the expression: 10s+–2s

likoan [24]

Answer:

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Terms

Step-by-step explanation:

Step 1: Define

10s + -2s

Step 2: Simplify

Rewrite: 10s - 2s
Combine like terms: 8s

3 0

2 years ago

Read 2 more answers

working together, melissa and jing can mow a lawn in 5 hours. It would take melissa 8 hours to do the job alone. What is the val

lubasha [3.4K]

Total Time = (M x K) / (M + K)
5 = (8 x K) / (8 + K)
40 + 5 K = 8K
40 = 3K
King can do the job in 13.33 Hours

King could mow (1 / 13.33) of the lawn in one hour.