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3 years ago

15

BRAINLIEST if you get it right...

1 answer:

TiliK225 [7]3 years ago

8 0

Answer:

average speed = (55 + 70 + 525) / 6

= 650 / 6

= 108.33 km per hour

Step-by-step explanation:

first hour = 55 per hour.

= 55

second and third = 35 per hour.

= 70

fourth, fifth and sixth = 175 per hour.

= 525

average speed = (55 + 70 + 525) / 6

= 650 / 6

= 108.33 km per hour

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2 years ago

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If y= -3x7+2x3+ x, the derivative of y with respect to x is

larisa [96]

Answer:

$\frac{dy}{dx}$ = - 21 $x^{6}$ + 6x² + 1

Step-by-step explanation:

Differentiate each term using the power rule

$\frac{d}{dx}$ (a $x^{n}$ ) = na $x^{n-1}$

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3 years ago

3(-0.4n-0.7)=-3.2n-2.58

svlad2 [7]

Answer:

$n=-0.24$

Step-by-step explanation:

$3\left(-0.4n-0.7\right)=-3.2n-2.58$

Use distributive property.

$-1.2n-2.1=-3.2n-2.58$

$-1.2n-2.1+2.1=-3.2n-2.58+2.1$

$-1.2n=-3.2n-0.48$

$-1.2n+3.2n=-3.2n-0.48+3.2n$

$2n=-0.48$

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3 years ago