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2 years ago

HELPS WHATS THE ANSWER

Mathematics

2 answers:

nikitadnepr [17]2 years ago

7 0

Answer:

$3x^2+2x-3$

Step-by-step explanation:

$3x^2 - 4x - 8 - ( 2x - 5 )$

$3x^2- 4x - 8 - 2x + 5$

$3x^2 +4x - 8 - 2x + 5$

$3x^2+2x-3$

$Solution = 3x^2+2x-3$

miv72 [106K]2 years ago

6 0

Answer:

Step-by-step explanation:

(f - g)(x)

= f(x) - g(x)

= 3x² + 4x - 8 - (2x - 5) ← distribute parenthesis by - 1

= 3x² + 4x - 8 - 2x + 5 ← collect like terms

= 3x² + 2x - 3 → A

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Read 2 more answers

A motion sensor has a range of 65 meters as shown. The ultrasonic waves sweeping out from the sensor span an angle of 135°.

VMariaS [17]

The approximate area that is within range of the motion sensor is 4975 square meters

<h3>How to determine the area of the range?</h3>

The figure is not given, however the area of the range can be calculated without the figure.

The given parameters are:

Angle, ⊕ = 135°

Radius, r = 65 meters

The area of the range is calculated using the following sector area

$A = \frac{\theta}{360} * \pi r^2$

This gives

$A = \frac{135}{360} * 3.14 * 65^2$

Evaluate

A = 4974.9375

Approximate

A = 4975

Hence, the approximate area that is within range of the motion sensor is 4975 square meters