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mina [271]
3 years ago
15

Which of the following is equivalent to the expression below?

Mathematics
1 answer:
PilotLPTM [1.2K]3 years ago
8 0

Answer:

C 9i

D -9i

Step-by-step explanation:

sqrt(-81)

sqrt(81) sqrt(-1)

we know that sqrt(-1) = i

±9i

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A restaurant advertises that its burritos weigh 250 g 250 g250, start text, space, g, end text. A consumer advocacy group doubts
pantera1 [17]

Answer: C) H0 : μ = 250 , Ha: μ < 250

Step-by-step explanation:

The questions is incomplete. The correct question is

A restaurant advertises that its burritos weigh 250 g. A consumer advocacy group doubts this claim, and they obtain a random sample of these burritos to test if the mean weight is significantly lower than 250 g. Let u be the mean weight of the burritos at this restaurant and ĉ be the mean weight of the burritos in the sample. Which of the following is an appropriate set of hypotheses for their significance test? Choose 1 answer:

A) H0 : x = 250 , Ha : x < 250

B) H0 : x = 250 , Ha : x > 250

C) H0 : μ = 250 , Ha: μ < 250

C) H0 : μ = 250 , Ha: μ > 250

Solution:

The null hypothesis is the hypothesis that is assumed to be true. The restaurant advertises that its burritos weigh 250. This is the null hypothesis. 250 is the population mean,μ . Thus, the null hypothesis is

H0 : μ = 250

The alternative hypothesis is what the researcher expects or predicts. The consumer advocacy group tests if the mean weight is significantly lower than 250g. This is the alternative hypothesis. It is expressed as

H0 : μ < 250

4 0
3 years ago
Im desperate xD
Marizza181 [45]
They both have the same intensity because both of them have a 1:4 ratio of concentration.
6 0
3 years ago
Read 2 more answers
How many time does 80 fit into 415
Elza [17]

Answer:

5 times

Step-by-step explanation:

have a good day/night :)

6 0
3 years ago
Read 2 more answers
-9=k-6
Shkiper50 [21]

Answer:

k = -3

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

Step-by-step explanation:

<u>Step 1: Define</u>

-9 = k - 6

<u>Step 2: Solve for </u><em><u>k</u></em>

  1. Add 6 to both sides:                    -3 = k
  2. Rewrite:                                         k = -3
3 0
3 years ago
Which expression equals the sum 1+2+3+4+5+6..
otez555 [7]

Answer:

7 * 3

7+7+7

3+3+3+3+3+3+3

2+2+2+2+2+2+2+2+2+2+1

(2*10)+1

(10*1)+11....

...and so on

Step-by-step explanation:

I don't know what type of expression you are looking for

7 0
2 years ago
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