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3 years ago

Evaluate the function f(x)=-5x2 + 4x -6 when x = 2

Mathematics

1 answer:

Fantom [35]3 years ago

5 0

f(x)=-5x2+4x-6

f(2)= -5*2*2+4*2-6

f(2)= -20+2

f(2)=-18

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What is the approximate area of the circle shown below 9.4 cm

aivan3 [116]

Answer:

Step-by-step explanation:

A= πr²

A= 22/7 multiply by the radius.

Divide 9.4cm by 2.

Whatever you get is your answer. Now take the formula I have shown you above. Whatever you get is your answer.

6 0

3 years ago

A cylindrical roller 2.5 m in length, 1.5 m in radius when rolled on a road was found to cover the area of 16500 m2 . How many r

eduard

Answer:

701 revolutions

Step-by-step explanation:

Given: Length= 2.5 m

Radius= 1.5 m

Area covered by roller= 16500 m²

Now, finding the Lateral surface area of cylinder to know area covered by roller in one revolution of cylindrical roller.

Remember; Lateral surface area of an object is the measurement of the area of all sides excluding area of base and its top.

Formula; Lateral surface area of cylinder= $2\pi rh$

Considering, π= 3.14

⇒ lateral surface area of cylinder= $2\times 3.14\times 1.5\times 2.5$

⇒ lateral surface area of cylinder= $23.55 \ m^{2}$

∴ Area covered by cylindrical roller in one revolution is 23.55 m²

Next finding total number of revolution to cover 16500 m² area.

Total number of revolution= $\frac{16500}{23.55} = 700.6369 \approx 701$

Hence, Cyindrical roller make 701 revolution to cover 16500 m² area.

8 0

3 years ago

Find the first, fourth, and tenth terms of the arithmetic sequence described by the given rule. A (n) = 5 + (n - 1)(1/6)

ArbitrLikvidat [17]

Answer:

the average story is 10 feet and the car is below ground so it would be negative. i assume the answer would be -20 feet

Step-by-step explanation:

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3 years ago

What value makes 2 square root 51 equal to 10 square root 51x

scoundrel [369]

25 is the answer
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4 0

3 years ago

Please help me I really need it

Art [367]

Answer:

Angle C

Step-by-step explanation:

By applying sine rule in the given triangle,

$\frac{\text{sinB}}{CD}=\frac{\text{sinC}}{BD}=\frac{\text{sinD}}{BC}$

$\frac{\text{sinB}}{\text{sinC}}=\frac{\text{CD}}{\text{BD}}$

Therefore, sides of the given triangle will be in the same ratio as the sine of the angles.

Since, BD > BC > CD

Therefore, Opposite angles of these sides will be in the same ratio.

∠C > ∠D > ∠B

Largest angle of the triangle is angle C.

7 0

3 years ago