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ElenaW [278]
3 years ago
8

Select the correct answer.

Mathematics
1 answer:
Alex_Xolod [135]3 years ago
3 0
The answer is D


Explanation:
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Let x1 = 12, y1 = 15, and y2 = 3. Let y vary inversely with x. Find x2.
Ostrovityanka [42]
We have that an inverse variation in a function is given by:
 y = k / x

 We must find the value of the constant k.
 To do this, we substitute the values of x1 = 12, y1 = 15.
 We have then:
 15 = k / 12

 Clearing k we have:
 k = (15) * (12)

k = 180
 Substituting the value of k we have that the inverse variation is:
 y = 180 / x

 For y2 = 3 we have:
 3 = 180 / x2

 Clearing x2 we have:
 x2 = 180/3
 x2 = 60
 Answer:
 
x2 = 60
3 0
3 years ago
A family of 12 went to the local Italian restaurant for dinner. Every family member ordered a drink and meal,3 ordered an appeti
egoroff_w [7]

Answer:

cost = 12 d + 12m + 3a + 6c

7 0
2 years ago
Match the numbers with the correct label
mr_godi [17]

Answer:

  see below

Step-by-step explanation:

In decimal, the values of the fractions are ...

  -0.2 = -0.200

  -3/7 = -0.429

  -2/8 = -0.250

So, in a, b, c order, they are ...

  a = -3/7

  b = -2/8

  c = -0.2

3 0
2 years ago
The mean amount of money spent on lunch per week for a sample of 458458 college students is $43$ 43. If the margin of error for
a_sh-v [17]

Answer:

The 99% confidence interval for the mean amount of money spent on lunch per week for all college students is between $41.40 and $44.60.

Step-by-step explanation:

A confidence interval has two bounds, a lower bounds and an upper bound.

These bounds depend on the sample mean and the margin of error.

The lower bound is the sample mean subtracted by the margin of error.

The upper bound is the margin of error added to the sample mean.

In this problem, we have that:

The sample mean is $43.

The margin of error is $1.60 for a 99% confidence interval.

Lower bound: 43 - 1.60 = $41.40

Upper bound: 43 + 1.60 = $44.60

The 99% confidence interval for the mean amount of money spent on lunch per week for all college students is between $41.40 and $44.60.

6 0
3 years ago
Will the solution to the following equation be positive or negative?
Schach [20]

Answner:

negative

Step-by-step explanation:

I hope it can help.

4 0
2 years ago
Read 2 more answers
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