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natta225 [31]
3 years ago
10

Sarah is testing different types of planting soil to determine which type is most effective in growing blueberry bushes. She pur

chases two different brands of planting soil from a local store. Sarah applies Brand A to 1 area of the yard and Brand B to another area of the yard, both of which receive full sunlight. She waters the area with Brand B daily; she waters the area with Brand A every other day. At the end of the study, Sarah concludes Brand B is more effective in growing blueberry bushes. Why is her conclusion not valid?
Mathematics
2 answers:
Dmitriy789 [7]3 years ago
8 0
It is not valid because she watered brand B every day, but brand A every other day. In order to get valid results, she had to water the area the same amount.
deff fn [24]3 years ago
5 0
 Her conclusion is not valid because she needs to give each plant the same amount of water.
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The travels you have described are:

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7 0
3 years ago
The first step in the process for factoring the trinomial x^2-3x-40 is to
jenyasd209 [6]

(x-8)(x+5)

First thing you do is put the X's into the parentheticals because it is x^2 meaning there are 2 factors with x's. Then, you wonder what factors of -40 could add to get -3. In this case, they are -8 and 5. -8 times 5 is -40 and -8 +5 is -3. Then, you just add -8 and 5 beside the x's in the parentheticals.

5 0
3 years ago
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How much is <br>30-[(19x2)-(3x4)]
aliina [53]
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5 0
3 years ago
A rectangular plot of ground is 30 meters longer than it is wide. its area is 10,000 square meters.
dimulka [17.4K]
A = W· L
10,000 = W ( W +30 ) = W² + 30 W
W² + 30 W - 10,000 = 0
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L = 86.12 + 30 = 116.12
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6 0
3 years ago
Math! 30 points + brainliest
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Answer:

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B) 7.4x10^-3 mm

Step-by-step explanation:

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6 0
3 years ago
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