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jonny [76]
4 years ago
12

you plant 30 african violet seeds and 9 of them sprout use experimental probability to predict how many will sprout if you plant

20 seeds
Mathematics
1 answer:
Ostrovityanka [42]4 years ago
8 0
Given that out of 30 planted seeds only 9 of the m sprouted, then:
Experimental probability =(number of occurrence of event)/(total number of trials made)
=9/30
=3/10
thus the number of seeds that will sprout given that 20 seeds we planted will be:
3/10×20
=6 seeds

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What is the simplified form of x plus 4 over x squared minus 3x minus 10⋅x minus 3 over x squared plus x minus 12? (6 points)
melomori [17]

Answer:

The simplified form is 1 over the quantity x plus 2 times the quantity

x minus 5 ⇒ 1/(x+2)(x-5) ⇒ last answer

Step-by-step explanation:

* Lets write the product of the two fraction

∵ \frac{x+4}{x^{2}-3x-10} *\frac{x-3}{x^{2}+x-12}

- At first factorize the denominators

# x² - 3x - 10

∵ x² = x × x ⇒ 1st term in the 1st bracket and 1st term in the

  2nd bracket

∵ -10 = 2 × -5 ⇒ 2nd term in the 1st bracket and 2nd term in the

  2nd bracket

∵ x × - 5 = -5x ⇒ ext-reams

∵ x × 2 = 2x ⇒ means

∵ 2x + -5x = -3x ⇒ middle term

∴ x² - 3x - 10 = (x + 2)(x - 5)

# x² + x - 12

∵ x² = x × x ⇒ 1st term in the 1st bracket and 1st term in the

  2nd bracket

∵ -12 = -3 × 4 ⇒ 2nd term in the 1st bracket and 2nd term in the

  2nd bracket

∵ x × 4 = 4x ⇒ ext-reams

∵ x × -3 = -3x ⇒ means

∵ 4x + -3x = x ⇒ middle term

∴ x² + x - 12 = (x - 3)(x + 4)

* Lets write the fractions after factorization

∴ \frac{x+4}{(x+2)(x-5)}*\frac{x-3}{(x-3)(x+4)}

- lets simplify the fractions by cancel (x - 3) up with (x - 3) down

 and cancel(x + 4) up with (x + 4) down

∴ \frac{1}{(x+2)(x-5)}*1=\frac{1}{(x+2)(x-5)}

* The simplified form is 1 over the quantity x plus 2 times the

  quantity x minus 5

3 0
3 years ago
Find the scale for 10cm=5m
Ivanshal [37]
10 cm = 5m
10/10  = 5/10
1 cm = 1/2 m
8 0
4 years ago
Read 2 more answers
Y = 2x^2 + 3<br> im looking for how to find the axis of symmetry
andre [41]

The axis of symmetry of the quadratic equation y = 2x^2 + 3 is x = 0

<h3>How to determine the axis of symmetry?</h3>

The equation is given as:

y = 2x^2 + 3

Differentiate the above equation with respect to x

y' = 4x + 0

This gives

y' = 4x

Set the equation to 0

4x = 0

Divide both sides by 4

x = 0

Hence, the axis of symmetry is x = 0

Read more about axis of symmetry at:

brainly.com/question/1349456

4 0
2 years ago
Read 2 more answers
Jen graphs y=1/2x+8. which point is on the line?
d1i1m1o1n [39]

Answer:

(0,8)

Step-by-step explanation:

the equation of the line is given in y=mx+b form and b is where the y axis is intersected, but it is also a point on the line.

8 0
4 years ago
10 points for question answered correctly and work shown<br> thanks!
MaRussiya [10]

Answer:

Part 1 - A

Answer: 301.592895 m^3

Step-by-step explanation:

The formula for the volume of a cone is calculated the formula:

<u>V = πr^2h/3  </u>

In the question, we are given the value of the radius and height in meters through which we can calculate the volume.

r = 6

h = 8

and we know the value of π to be 22/7, or 3.14285714286.

By substituting these values in the formula, we can solve for volume of the cone:

V = π (6)^2 8 / 3  

Volume = 301.592895 m^3

Hope this helps!

4 0
3 years ago
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