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SVETLANKA909090 [29]
3 years ago
5

F(x)=2x^2+3 when x=3

Mathematics
1 answer:
Rudik [331]3 years ago
5 0
2x^2+3
x=3
2(3)^2+3
2(9)+3
18+3
21 is the answer.
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To cut a lawn, Allan charges a fee of $15 for his equipment and $8.50 per hour spent cutting a lawn. Taylor charges a fee of $12
777dan777 [17]

Answer:


Step-by-step explanation:

Let y be the total charge and x no of hours spent for cutting the lawn,

Then for Allan we have the equation as

y = 8.50x+15

SInce 15 is the fixed charge and 8.50 is charged per hour we get the above equation for Allan.

Next similarly for Taylor, we have fixed charges 12 and variale 9.25

y =9.25x+12

When Taylor total charges is greater than Allan's total charge

we have 9.25x+12>8.5x+15

Simplify to get

0.75x>3

Or x>4

Whenever x i.e. no of hours exceed 4, Taylor charges will be greater than that of Allan

5 0
3 years ago
The shower block on the campsite has an area of 144 m2 The length of the shower block is 24 m.What is the width?
g100num [7]

Since the shower block is in the form of a rectangle. The shower block has an area of 144m^{2}. It has a length of 24m. We need to calculate the width of the shower block.

Area of rectangular shower block = length \times width

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width = = \frac{144m^{2}}{24m}

width = 6m

So, the width of the shower block is 6 meters.

8 0
4 years ago
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:

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Answer:

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Yp = -10 + ⅓(-1+10)= -10+⅓(9)= -10+3=-7

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Answer:

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