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2 years ago

For the probability experiment of selecting a chip at random from a bag

1 answer:

andrey2020 [161]2 years ago

5 0

9/100

The chance of selecting a chip at random is equal for all chips, and since there are 9 chips that have a number less than 9, you add their individual probabilities so that 1/100 + 1/100 + 1/100... = 9/100

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8. 20% of 70 plants

Talja [164]

Answer:

20% of 70 plants is 14 plants.

Step-by-step explanation:

20×70= 1400

1400/100= 14

5 0

2 years ago

Read 2 more answers

Write the equation of the parabola that has the vertex at point (3,−12) and passes through the point (0,6).

lana [24]

Answer:

y = 2(x-3)^2 -12

y = -4/9(x-2)^2 +7 bonus

Step-by-step explanation:

The vertex form of a parabola is

y = a(x-h)^2 + k where (h,k) is the vertex

y = a(x-3)^2 - 12

We have one point given (0,6)

6 = a (0-3) ^2 -12

6 = a (-3)^2 -12

6 = 9a-12

Add 12 to each side

6+12 = 9a

18 = 9a

Divide each side by 9

18/9 = 9a/9

a=2

y = 2(x-3)^2 -12

We follow the same steps for the bonus

y = a(x-2)^2 +7

Substitute the point into the equation

3 = a (-1-2)^2 +7

3 =a (-3)^2 +7

3 = 9a +7

subtract 7 from each side

3-7 = 9a +7-7

-4 = 9a

Divide by 9

-4/9 =a

y = -4/9(x-2)^2 +7

3 0

2 years ago

Read 2 more answers

I NEED HELP!! answer from the image below m∠BCD =

nevsk [136]

Answer:

28 degrees

Step-by-step explanation:

If two parallel lines are cut by a transversal, then the pairs of corresponding angles are congruent.The corresponding angles are the ones at the same location at each intersection.

In the figure ABD and EDF are corresponding angles. So they are equal

So equation the angle ABD and EDF , we get

(3x+4) = (7x-20)

Group the like terms,

3x-7x = -20-4

-4x = -24

$x = \frac{-24}{-4}$