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timofeeve [1]
2 years ago
11

Help please lol :)).

Mathematics
1 answer:
katen-ka-za [31]2 years ago
7 0

Answer:

$10.50

Step-by-step explanation:

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The formula for the circumference of a circle is C = 2r, where r is the radius and C is the circumference. The equation solved f
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r = c/2pi

Step-by-step

c= pi*d

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2 years ago
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A cell phone company has a basic plan of $40 plus $0.45 for any minutes over 700. Before receiving his statement, John saw he wa
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Answer:

718\ min

Step-by-step explanation:

Let

x ----> the number of minutes

y ----> the total charge in dollars

we know that

For x>700 min

y=0.45x+40

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For y=48.10

substitute

48.10=0.45x+40

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solve for x

45x=4,810-4,000\\45x=810\\x=18\ min

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7 0
3 years ago
Y+7=9/10(x+9) in standard form
sammy [17]
Alright,

-9/10x + y = 1 1/10 
8 0
3 years ago
What are the focus and directrix of the parabola that is the graph of the function f(x)=x²?
Hitman42 [59]

Answer:

Step-by-step explanation:

Given

y=x^2

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a=\frac{1}{4}

so Focus of parabola is (0,0)

directrix

y=-a

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y=-\frac{1}{4}      

5 0
3 years ago
Use the functions f(x)=2x and g(x)=x^2+1 to find the value of each expression
Alinara [238K]

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1.  20

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We have that:

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f(g(x)) = f(x²-1) = 2(x²+1) = 2x² + 2

1. f(g(3))

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2. f(3)+g(4)

f(3) = 2(3) = 6

g(4) = 4² + 1 = 17

f(3) + g(4) = 6 + 17 = 23

3. f(5) - 2g(1)​

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6 0
3 years ago
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