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Feliz [49]
3 years ago
7

Algebra 1 I need help ASAP

Mathematics
1 answer:
galben [10]3 years ago
3 0

Find the depth of the river at 9 hours and 18 hours by seeing where the line is on the Y axis.


At 9 hours the river is 18 feet deep

At 18 hours the river is 21 feet deep.



The average rate of change is the change in Y over the change in X

The Y is the depth and the X is the time:


(21-18) / (18-9) = 3/9 = 1/3 = 0.33


The average rate of change is 0.3 foot per hour. ( Rounded to nearest tenth)

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Can you help me simplify this expression 16d + 20c + 5d -7 - 8c - 7d + 3?
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Answer:

12c + 14d - 4

Step-by-step explanation:

16d + 20c + 5d -7 - 8c - 7d + 3

Simplify the expression

__________________________

To solve, we need to first take in mind the fact that there are different like terms within this expression. Like terms are numbers or values that end in different symbols, such as variables or exponents. Since we are filled with variables such as c and d. We can do as followed :

Combine the "d" like terms :

16d + 5d - 7d

21d - 7d

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Combine the "c" like terms :

20c - 8c

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Combine the constants :

-7 + 3

-4

Now add all of the values together to get the final expression.

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3 years ago
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lutik1710 [3]
<h3>Answer: Choice C</h3>

cos(a - b) = cos(a)cos(b) + sin(a)sin(b)

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cos(180 - q) = cos(180)cos(q) + sin(180)sin(q)

cos(180 - q) = -1*cos(q) + 0*sin(q)

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cos(180 - q) = -cos(q)

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Answer:

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Step-by-step explanation:

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That was a very dumb question !?

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