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nekit [7.7K]
3 years ago
10

Which expression is a multiplicative inverse of 25 A: -25 B: 1/25 C: 2.5 D: 25/1

Mathematics
1 answer:
slega [8]3 years ago
7 0
The answer is A. because a multiplicative inverse is usually just the opposite of the number. 
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A cylinder has a base diameter of 8 inches and a height of 7 inches. What is its volume in cubic inches, to the nearest tenths p
DaniilM [7]

Answer:

351.9 cubic in

Step-by-step explanation:

The volume of a cylinder is hr²π.

r is half the diameter, so 8/2 is 4.

Plug in your h and r and get:

7 * 4² * π

7 * 16 * π

112π

Multiply the π and you'll get about 351.9 cubic in

7 0
3 years ago
An ANOVA procedure is applied to data obtained from four distinct populations. The samples, each comprised of 15 observations, w
otez555 [7]

Answer:

a. 3 and 56, respectively.

Step-by-step explanation:

The computation of the degrees of freedom for the numerator and denominator for the critical value of F is given below:

k = 4

n = 15

Total degree of freedom is

= nk - 1

= 59

For numerator, it is

= k -1

= 4 - 1

= 3

and for denominator it is

= T - (k -1 )

= 59 - 3

= 56

3 0
3 years ago
Help with Geometry homework please.?
jolli1 [7]

Answer:

a. 60° it is opposite the other 60° angle

b. 120° it is supplementary with the 60° angle

c. 120° it is supplementary with the 60° angle

5 0
3 years ago
The Johnson Farm has 500 acres of land allotted for cultivating corn and wheat. The cost of cultivating corn and wheat (includin
babunello [35]

Answer:

He should plant 100 acres of corn and 400 acres of wheat.

Step-by-step explanation:

This problem can be solved by a siple system of equations.

]x denotes the number of acres of corn

y denotes the number of acres of wheat

Building the system:

The Johnson Farm has 500 acres of land allotted for cultivating corn and wheat. This means that:

x + y = 500

The cost of cultivating corn and wheat (including seeds and labor) is $42 and $30 per acre, respectively. Jacob Johnson has $16,200 available for cultivating these crops. This means that:

42x + 30y = 16,200

So, we have the following system

1) x + y = 500

2) 42x + 30y = 16,200

If he wishes to use all the allotted land and his entire budget for cultivating these two crops, how many acres of each crop should he plant?

1) x + y = 500

2) 42x + 30y = 16,200

I am going to write y as a function of x in 1), and replace in 2). So:

x + y = 500 means that y = 500-x

42x + 30y = 16,200

42x + 30(500-x) = 16,200

42x + 15000 - 30x = 16,200

12x = 1,200

x = \frac{1,200}{12}

x = 100

Now, going back to 1:

y = 500 - x = 500 - 100 = 400

He should plant 100 acres of corn and 400 acres of wheat.

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3 years ago
At a certain time of day, a 5 foot tall man has a 4 foot shadow. If a tree is 20 feet tall, what is the length of the tree’s sha
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Set up a proportion and get the answer x=16
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4 years ago
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