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3 years ago

(3x^2-15d) - (-10x^2-4d)

Mathematics

2 answers:

ElenaW [278]3 years ago

6 0

<span>(3x^2-15d) - (-10x^2-4d) = 13x^2-11d

Hope this helps!!
</span>

kirill [66]3 years ago

4 0

Yehhhh man whattt hee said im just trynnna get more points

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3 years ago

a plane averaged 400 mph on a trip going east, but only 280 mph on the return trip. The total flying time in both directions was

Liula [17]

Answer:

1400 miles

Step-by-step explanation:

Speed is the time rate of change of distance. It is the ratio of distance to time and is given by the equation:

$Speed(S) = \frac{distance(d)}{time(t)}\\ S=\frac{d}{t}$

plane averaged 400 mph on a trip going east, but only 280 mph on the return trip.

The time spent (t₁) in going east is given by:

$S=\frac{d}{t_1}\\ t_1=\frac{d}{S} =\frac{d}{400mph}$

The time spent (t₂) in going east is given by:

$S=\frac{d}{t_2}\\ t_2=\frac{d}{S} =\frac{d}{280mph}$

The total time (t) = t₁ + t₂

t = t₁ + t₂ = 8.5 hours

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Therefore the one way distance is 1400 miles

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3 years ago

If -2 is a root of the quadratic equation x²-5x+c find the value of c

Tcecarenko [31]

Answer:

Step-by-step explanation:

P(x)= x^2-5x+c=0

P (-2)= (-2)^2-5 (-2)+c=0

= 4+10+c=0

=14+c=0

C=(-14)

3 0

3 years ago

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