Plzzzzzz help me need to pass this

Mathematics

1 answer:

gavmur [86]3 years ago

6 0

-2r+3 ≥ 19
-2r ≥ 19-3
-2r ≥ 16
2r ≤ -16
r ≤ -16/2
r ≤ -8

r ∈ (-∞; -8]

Your answer is C

You might be interested in

What is the value of x?

barxatty [35]

Answer:

Step-by-step explanation:

x² = 40² + 9²

= 1600 + 81

x² = 1681

x = √1681

x= 41

3 0

3 years ago

A river flows at the rate of 12 feet per minute. What is the rate in second per foot?

ASHA 777 [7]

Answer: 1/5 or 0.2 in decimal form.

Explanation:

There are 60 seconds in a minute. We know the river flows 12 ft per 1 minute. So in order to find the rate per seconds, divide: 60/12. You get the answer: 1/5 or 0.2 in decimal form.

4 0

2 years ago

Approximately 5% of calculators coming out of the production lines have a defect. Fifty calculators are randomly selected from t

baherus [9]

Answer:

0.2611 = 26.11% probability that exactly 2 calculators are defective.

Step-by-step explanation:

For each calculator, there are only two possible outcomes. Either it is defective, or it is not. The probability of a calculator being defective is independent of any other calculator, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$