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NARA [144]
3 years ago
14

-4-{11-[4-(9)]} Solve

Mathematics
1 answer:
Ghella [55]3 years ago
4 0

Answer:

51


Step-by-step explanation:


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If x2=7 what is a value of x?<br><br> A.√7<br> B.3.5<br> C.√49<br> D.14
ikadub [295]

Answer:

x = sqrt(7) or x = -sqrt(7) thus of the choices you have A:

Step-by-step explanation:

Solve for x:

x^2 = 7

Take the square root of both sides:

Answer: x = sqrt(7) or x = -sqrt(7)

4 0
2 years ago
Alana ate breakfast at a restaurant. The bill came to $79.75. If she left 20% tip, how much was the tip?
Lana71 [14]
$79.75*0.2= 15.95
$79.75-15.95= $63.80
63.80+15.95= $79.75

Answer= $15.95
3 0
2 years ago
A local company wants to evaluate their quality of service by surveying their customers.
stich3 [128]

Answer: b. 0.98

Step-by-step explanation:

The formula to find the maximum error of the estimated mean :

E=z^*\dfrac{\sigma}{\sqrt{n}}            (1)

, where \sigma = standard deviation

n= Sample size

z* = Critical z-value.

As per given , we have

\sigma=5

n=100

Critical value for 95% confidence interval = z*=1.96

Put these values in the formula (1), we get

E=(1.96)\dfrac{5}{\sqrt{100}}

E=(1.96)\dfrac{5}{10}=0.98

Hence, the maximum error of the estimated mean quality for a 95% level of confidence is 0.98.

Therefore , the correct answer is b. 0.98 .

6 0
2 years ago
Read 2 more answers
State the domain and range for the following relation. Then determine whether the relation represents a function
ankoles [38]

Answer:

  • domain = (Rosa,Alia,Alice,Marie)
  • Range = (Alan,Hank,Ben)
  • Is a function

Step-by-step explanation:

Because each member in the domain has only one element on the co domain

7 0
2 years ago
A dog breeder plans to mix two types of food to make a mix of low cost
lys-0071 [83]

Answer:

  • 3.75 bags of ChowChow
  • 0.75 bags of Kibble

Step-by-step explanation:

The constraints on protein, minerals, and vitamins give rise to the inequalities ...

  40c +30k ≥ 150 . . . . . . required protein

  20c +20k ≥ 90 . . . . . . required minerals

  10c +30k ≥ 60 . . . . . . . required vitamins

And we want to minimize 10c +12k.

The graph shows the vertices of the feasible region in (c, k) coordinates. The one that minimizes cost is (c, k) = (3.75, 0.75).

To minimize cost, the daily feed should be ...

  • 3.75 bags of ChowChow
  • 0.75 bags of Kibble

Daily cost will be $46.50.

5 0
3 years ago
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