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Zinaida [17]
2 years ago
8

Please help

Mathematics
1 answer:
Ipatiy [6.2K]2 years ago
4 0

Answer:

cos (theta) = √21/5

Step-by-step explanation:

sin (theta) = 2/5

(sin (theta))^2 = 4/25

4/25 + (cos (theta))^2 = 1

(cos (theta))^2 = 1 - 4/25 = 21/25

cos (theta) = √21/5

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Answer:

y= 1/3x+26/3

Step-by-step explanation:

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Will donate 5 dollars
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The value of x is less than 16
4 0
3 years ago
Solve using proportions.
denis23 [38]

Answer:

7.8 = k

Step-by-step explanation:

Since the figures are similar, we can use proportions

c           k

----- = -------

b            j

Substituting the values in

6.5         k

----- = -------

4          4.8

Using cross products

6.5 * 4.8 = 4k

31.2 = 4k

Divide each side by 4

31.2/4 = 4k/4

7.8 = k

3 0
2 years ago
2. Let's pretend I'd give you a penny today, two pennies
gizmo_the_mogwai [7]
Answer:
-f(n+1) = f(n) x 2
-on the 10th day you'd receive $512
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example of use:
f(10) = f(9) x 2
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7 0
1 year ago
What is the first term of the expression?<br><br><br> −6xyz + 9xy + 12x + 18y <br><br> TIA!
tatyana61 [14]

For this case we have that by definition:

  • <em>The terms of a polynomial expression are those that are composed of coefficients and variables separated by signs of addition and subtraction. </em>

We then have the following expression:

-6xyz + 9xy + 12x + 18y

According to the definition, we can conclude that the first term is given by:

-6xyz

Answer:

The first term of the expression is:

-6xyz

4 0
3 years ago
Read 2 more answers
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