4 years ago

Write 2 equivalent expressions that illustrate the associative property of addition

Mathematics

1 answer:

Katen [24]4 years ago

6 0

(5 + 2) + 1 = 5 + (2 + 1)

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Mrs. Huang operates a soybean farm. She buys many supplies in bulk. Often the bulk products need to be custom mixed before Mrs.

Evgen [1.6K]

To solve this problem, let us first assign variables. Let us say that:

x = volume of 67% herbicide solution

y = volume of 46% herbicide solution

The total volume should be 42 liters therefore:

x + y = 42

x = 42 – y --> 1

The component mass balance on the pure herbicide would be:

0.67 x + 0.46 y = 0.55 (42) --> 2

Substituting equation 1 to 2:

0.67 (42 – y) + 0.46 y = 23.1

28.14 – 0.67 y + 0.46 y = 23.1

- 0.21 y = - 5.04

y = 24 L

Calculating for x using equation 1:

x = 42 – 24

x = 18 L

Therefore we only need 18 L of the 67% herbicide solution.

Answer:

A. 18 L

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4 years ago

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The function f is defined by the following rule.<br> f(x) = x - 4<br> Complete the function table.

Vanyuwa [196]

Answer:

-9

-6

-4

-3

Step-by-step explanation:

hope this helps!

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2 years ago

Complete the congruence statement.

Westkost [7]

I need more information to understand and complete

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2 years ago

If there are 20 values in a data set in order from smallest to largest, what is

Natasha_Volkova [10]

Answer:

C The mean of the 10th and 11th values

Step-by-step explanation:

Strike the lowest and largest number until you get 1 or 2:

1, 2, 3,4 5,6 ,7 8, 9, 10, 11, 12, 13 ,14, 15, 16, 17, 18, 19, 20

2, 3,4 5,6 ,7 8, 9, 10, 11, 12, 13 ,14, 15, 16, 17, 18, 19

3,4 5,6 ,7 8, 9, 10, 11, 12, 13 ,14, 15, 16, 17, 18

4 5,6 ,7 8, 9, 10, 11, 12, 13 ,14, 15, 16, 17

5,6 ,7 8, 9, 10, 11, 12, 13 ,14, 15, 16,

,6 ,7 8, 9, 10, 11, 12, 13 ,14, 15

,7 8, 9, 10, 11, 12, 13 ,14,

8, 9, 10, 11, 12, 13

9, 10, 11, 12

10, 11,

Finding the Mean:

10+11

21/2

Mean:

10.5

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3 years ago

Multiplying or dividing both sides by a negative number changes the direction of an inequality

omeli [17]

If you multiply or divide both sides by a negative number it changes the direction of the inequality sign

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4 years ago

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