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alexdok [17]
3 years ago
6

Can someone help me please

Mathematics
1 answer:
Andre45 [30]3 years ago
6 0

Answer:

Is there a choice D in this because A, B and C are all incorrect answers

Step-by-step explanation:

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21 marbles out of N are blue; probability of getting a blue one = 30%
MissTica
Probability=\frac{desired}{total}
0.3=\frac{21}{N}
0.3N=21
N=\frac{21}{0.3}
N=70

There are 70 total marbles. 
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3 years ago
a manufacturer is designing a flashlight for the flashlight to admit a focused beam the bull needs to be on the central axis of
Helen [10]

Answer:

y= 1/12(x-0)^2+0

this answer works as an upward parabola

Step-by-step explanation:

  • The formula for a veritcal parabola is y=1/4p(x-h)^2+k
  • (h,k)= coordinates of the vertex of the parabola
  • p= absolute value of the distance from the vertex to the focus/directrix
  • In this problem, it is given that the vertex is at the origin (0,0) and the focus (the bulb), is 3 centimeters away from the vertex.
  • Now, you know the values of the variables. Fill in the values
  • FROM THE FORMULA: 1/4p turns into 1/12 since p is 3.
  • (x-h)^2+k turns into (x-0)^2+0, since h and k where the values of the vertex which was 0,0
  • once all the variables are given values (except x and y) you have made your equation!
  • The answer is y=1/12(x-0)^2+0

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8 0
2 years ago
Aryon has $15. He buys 2 Cokes that each cost $1.00. He also buys a
fenix001 [56]
15.00-5.00-2.00-2.00= $6.00
7 0
2 years ago
The value of the variable which makes an equation a true sentence is called the ___ of the equation​
kirill [66]

Answer:

Solution

Step-by-step explanation:

the value of the variable which makes an equation a true sentence is called the <u>solution</u> of the equation

4 0
2 years ago
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PLEASE HELP GIVING BRAINLIEST TO CORRECT ANSWER
Vedmedyk [2.9K]

Answer:

The answer is: The third option/C

Step-by-step explanation:

7 0
2 years ago
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