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Nookie1986 [14]
3 years ago
10

3. use the law of exponents to evaluate (1/x) ^ -n when x= 7 and n= 2

Mathematics
1 answer:
emmainna [20.7K]3 years ago
8 0
D on both ...................
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Several high schools participated in a study to evaluate the effectiveness of a new computer-based math curriculum. In all these
tensa zangetsu [6.8K]

Step-by-step explanation:

a

the study is experimental as we do not just observe students performance. 2 techniques were also randomly assigned. there is control over teaching techniques and performance is also observed.

b.

these are the 3 factors: high school, instructions type, scores.

high school has 2 levels. level 1, is 3 high school. level 2: each high school has 4 sections and these 4 have 24 students.

instructions type: 1 level divided into standard and computer based.

scores: 0 ( no level)

c.

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instructions type has between too. since there are two different types.

we have 24 students in each section which are within subjects.

d.

score on test is dependent variable

e.

student is basic experimental unit.

4 0
3 years ago
Marcus has a bag of cat food that contains 22 1/2 cups.if he feeds his cats a total of 3/4 cup of food per day,how many days wil
Korvikt [17]

Answer:

30 days.

Step-by-step explanation:

22 1/2 = 45/2 since 22*2+1 = 45, then divide that by 3/4 which, in reality, means multiply by 4/3. I then cross-multiplied by finding the GCF of the diagonal pairs. I hope this helped! Please mark Brainliest if it did.

7 0
3 years ago
Given that <br><img src="https://tex.z-dn.net/?f=x%20%3D%205y%20-%20z" id="TexFormula1" title="x = 5y - z" alt="x = 5y - z" alig
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x = 5y - z

You can think that x and z are numbers, and we have one variable z.

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x - 5y = - z

(x - 5y)*(-1) = - z *(-1)

z = - x + 5y

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PLEASE HELP!!! I don't get this and I really need help on this​
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