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goldenfox [79]
4 years ago
9

5) BRAINLIEST + 15 POINTS :)

Mathematics
1 answer:
MAXImum [283]4 years ago
4 0

Answer:

The answer is D.

Step-by-step explanation:

As the question say x represents number of minutes and y represents total amoumt so $5 and $10 is a fixed amount that are needed to pay for each month. So the expression for each month that is needed to pay is :

y = 0.99x + 5

y = 0.79x + 10

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Use a half-angle identity to find the exact value of sinPi/8
stellarik [79]

Answer:

  sin(π/8) = (1/2)√(2-√2)

Step-by-step explanation:

Using the half-angle formula ...

  \sin{\dfrac{\theta}{2}}=\sqrt{\dfrac{1-\cos{\theta}}{2}}

We can let θ = π/4 and simplify the result as follows:

  \sin{\dfrac{\pi}{8}}=\sqrt{\dfrac{1-\cos{(\pi/4)}}{2}}=\sqrt{\dfrac{1-\dfrac{\sqrt{2}}{2}}{2}}=\sqrt{\dfrac{2-\sqrt{2}}{4}}\\\\=\boxed{\dfrac{1}{2}\sqrt{2-\sqrt{2}}}}

5 0
3 years ago
Read 2 more answers
-<br> (<br> -<br> 7.4–1.1)–(2.1–8.1)
SashulF [63]

Answer:

0.3

Step-by-step explanation:

(7.4-1.1) - (2.1-8.1)

Lets start with (7.4-1.1)

Step 1:

(7.4-1.1) =6.3 (All you do is subtract 7.4-1.1 and it gives you 6.3)

Step 2: Lets do (2.1-8.1)

(2.1-8.1)= -6 (2.1 minus 8.1 gives you -6 because 2.1 is smaller than 8.1 so it will give you a negative)

Step 3: Subtract

6.3-6

So your answer would be 0.3

Hope that helped :)

5 0
4 years ago
Question 2 (Multiple Choice Worth 1 points)
mariarad [96]

Answer:

D (last one)

Step-by-step explanation:

(x - 3)(x + 11)

Expand

x² + 11x - 3x - 33

Simplify

x² + 8x - 33

4 0
3 years ago
If z is directly proportional to x and z=12 when x=3,Find the value of x when z=18 *​
miskamm [114]

Answer:

x = 4.5

Step-by-step explanation

When z is 6 that means x is 1.5 which means that when z is 18 then x is 4.5 because we add 3+1.5 which is 4.5

4 0
3 years ago
Which set of ordered pairs does not describe a function
jeka94
Well where is the functions?
6 0
3 years ago
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