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Brilliant_brown [7]
3 years ago
15

In the given diameter 12cm and

Mathematics
1 answer:
lakkis [162]3 years ago
5 0

Answer:

12.6 cm

Step-by-step explanation:

Given:

m<AOB = θ = 120°

Diameter (d) = 12 cm

Required:

Length of arc AB

Solution:

Length of arc AB = θ/360 × πd

Plug in the values

Length of arc AB = 120/360 × π×12

≈ 12.6 cm (nearest tenth)

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The ratio of the cost of a tennis racket ro tennis balls is 18:1. If a can of balls cost $5.35, what is the cost of the racket?
siniylev [52]

Multiply the ratio by $5.35

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The racket costs $96.30.

5 0
2 years ago
Using the discriminant, describe the nature of the roots for the equation <br> 49x^2 − 28x + 4 = 0.
scZoUnD [109]

Answer:

Put the equation in standard form by bringing the 4x + 1 to the left side.

7x2 - 4x - 1 = 0

We use the discriminant to determine the nature of the roots of a quadratic equation. The discriminant is the expression underneath the radical in the quadratic formula: b2 - 4ac.

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Now here are the rules for determining the nature of the roots:

(1) If the discriminant = 0, then there is one real root (this omits the ± from the quadratic formula, leaving only one possible solution)

(2) If the discriminant > 0, then there are two real roots (this keeps the ±, giving you two solutions)

(3) If the discriminant < 0, then there are two imaginary roots (this means there is a negative under the radical, making the solutions imaginary)

44 > 0, so there are two real roots

4 0
2 years ago
Each morning Rin rides 1.5 miles to school and then rides home in the afternoon. Later in the evening, she rides to the park and
brilliants [131]

Answer:

Last equation given in the list of possible answers:

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Step-by-step explanation:

We need to include in the total addition of miles ridden during the week:

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b) 1.5 miles from school back home

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so for the miles ridden per day we have: "1.5 +1.5 + x"

Now, since per week she does 5 days like this, then we need to multiply the expression above by 5 in order to total the number of miles she rides weekly (25 miles)

5 ( 1.5 + 1.5 + x ) = 25

And we can use this equation to find the amount "x" that Rin rides in the evening.

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3 years ago
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A rational expression is undefined when the denominator is zero.
V=\dfrac{5-x}{x(x-2)}
is undefined when x=0 or x=2.
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