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koban [17]
3 years ago
6

19.

Mathematics
1 answer:
ziro4ka [17]3 years ago
4 0

Answer:

B. y= -3x2 + 3

Step-by-step explanation:

y= -3^2+3

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A big department store employs a total of 180 people. of these 180 people, 27 are managers, 100 are floor assistants, and the re
PilotLPTM [1.2K]

Among 180 people 27 are managers, 100 are floor assistants and the rest are helpers. Under the rest we mean 180-27-100=53 people.

The event "randomly selected employee is not a floor assistant" is the same as "randomly selected employee is manager or helper". You can count that in total 27+53=80 people form the set of managers and helpers.

Then the probability that randomly selected employee is not a floor assistant is

Pr=\dfrac{80}{180}=\dfrac{4}{9}.

Answer: Pr=\dfrac{4}{9}.

6 0
3 years ago
Find the reference angle of -320 degrees
CaHeK987 [17]

Answer:

  40°

Step-by-step explanation:

The reference angle is the positive difference between an angle and the nearest multiple of 180°.

Here, the nearest multiple of 180° is -360°. The difference of interest is ...

  |-320° -(-360°)| = 40°

The reference angle is 40°.

3 0
3 years ago
3. A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation
34kurt
  <span>When it hit the ground
y = 0 
y = –0.04x^2 + 8.3x + 4.3 
0.04x^2 - 8.3x - 4.3 = 0 
x = [-(-8.3) +/- √{(-8.3)^2 - 4 x 0.04 x (-4.3)}]/[2 x 0.04] 
x = [8.3 +/- 8.34]/[0.08] 
x = 208.02 m
A is right option
hope this helps</span>
3 0
3 years ago
Read 2 more answers
Write an equivalent expression to 8k-(5+2k) without parenthesis
iVinArrow [24]

Answer:

6k-5

Step-by-step explanation:

8k-(5+2k) write the equation out

8k-5-2k distribute the (-) to everything inside the parenthesis

6k-5 combine like terms

7 0
3 years ago
Edgar has a birdbath that holds 2 gallons of water. He only want to fill it 3/4 full. How much water, in gallons, should Edgar p
stepan [7]
Hello!

2 gallons ÷ 4 = 0.50

0.50 × 3 = 1.50

Edgar should put 1.50 gallons of eater in the birdbath.
7 0
3 years ago
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