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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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Kameryn types 75 words per minute and is just starting to write a term paper. Joe already has 510 words written and types at a s
AnnZ [28]

Answer:

Kameryn will have more words typed than Joe when the number of minutes exceeds 34.

Step-by-step explanation:

Let

x -----> the number of minutes

y ----> the total words typed

we know that

<em>Kameryn</em>

y=75x -----> equation A

<em>Joe</em>

y=60x+510 -----> equation B

Solve the system of equations by substitution

Substitute equation A in equation B and solve for x

75x=60x+510

75x-60x=510

15x=510

x=34\ minutes

That means

For x=34 minutes

The amount of words written by Kameryn and Joe are the same.

therefore

For x > 34 minutes

Kameryn will have more words typed than Joe when the number of minutes exceeds 34.

6 0
3 years ago
27 + (8-5) -am looking for the answer of number 7
Rasek [7]

Answer:

The answer to the equation from question 7 is 14.

Step-by-step explanation:

In question 7, we are given an equation.

2³ + (8 - 5)² - 3

First, subtract 5 from 8 in the parentheses.

2³ + 3² - 3

Next, solve the exponents for 2³ and 3².

8 + 9 - 3

Add 8 to 9.

17 - 3

Subtract 3 from 17.

14

So, the answer to this equation from question 7 is 14.

4 0
3 years ago
Leah wants to carpet a room that is 12 feet wide and 15 feet long. Carpeting is sold by the square yard. Find the length and wid
Zigmanuir [339]

Answer:

length: 5 yd

width: 4 yd

area: 20 yd^2

Step-by-step explanation:

1 yd = 3 ft

15 ft * (1 yd)/(3 ft) = 5 yd

12 ft * (1 yd)/(3 ft) = 4 yd

A = LW

A = 5 yd * 4 yd = 20 yd^2

7 0
3 years ago
Read 2 more answers
A seller has a house that is 2100 ft. The neighborhood comps show the line of best fit to be y = 0.074x + 50.48. What is a fair
Irina18 [472]

Answer:

$206,000

Step-by-step explanation:

Hope this helps :)

if you can mark brainliest pls

5 0
2 years ago
I will mark you brainliest!!!! Which ordered pair is the best approximation of the solution?
Ulleksa [173]

Answer:

D

Step-by-step explanation:

We can substitute y = 2x + 1 in the second equation

2x + 1 = -7x + 8

Add 7x to both sides

9x + 1 = 8

Subtact 1 from both sides

9x = 7

x = 7/9

Substituing x in the first equation

y = 14/9 + 1

x rounds to 0.8

y rounds to 2.5

 

5 0
3 years ago
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