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3 years ago

-30 + 10 Find the sum

Mathematics

1 answer:

ludmilkaskok [199]3 years ago

5 0

The answer of -30+10 is -20

-30+10=-20

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A train on a straight track goes in the positive direction for 6.7 km , and then backs up for 4.0 km . Is the distance covered b

RSB [31]

Answer:

Distance is greater than the displacement.

Step-by-step explanation:

We are given that a train on a straight track goes in the positive direction.

We have to find that distance covered by the train is greater than, lees than or equal to its displacement.

Train covered distance in positive direction=6.7 km

Train covered distance in back=4.0 km

Distance covered by the train=6.7+4=10.7 Km

Because distance is the length of path covered by object.

Displacement =Final position -Initial position

Displacement =6.7-4=2.7 km

10.7 > 2.7

Distance > Displacement

Hence, Distance is greater than the displacement.

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Four businessman invested a sum of RS 2,50,000 in the ratio of 3:5:7:10 to start a new business.

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3 years ago

Symbolism uses a concrete image to convey something that is what? Choices are: 1. lost. 2. intangible. 3. tangible. 4. uncertain

Shalnov [3]

I believe the correct answer from the choices listed above is option 2. Symbolism uses a concrete image to convey something that is intangible. I<span>t is an object representing another to give it an entirely different meaning that is much deeper and more significant.</span>

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Find all points on the circle (x^2) + (y^2) = 676 where the slope is 5/12

borishaifa [10]

Implicit defferentation

remember that dy/dx y= dy/dx

so
take derivitive of both sides
$2x+2y \space\ \frac{dy}{dx}=0$
solve for $\frac{dy}{dx}$
minus 2x both sides
$2y \space\ \frac{dy}{dx}=-2x$
divide both sides by 2y
$\frac{dy}{dx}=\frac{-2x}{2y}$
$\frac{dy}{dx}=\frac{-x}{y}$

when is the slope equal to $\frac{5}{12}$
solve for $\frac{dy}{dx}=\frac{5}{12}$
$\frac{dy}{dx}=\frac{5}{12}$
$\frac{5}{12}=\frac{-x}{y}$
$5y=-12x$
$y=\frac{-12}{5}x$
find where the circle and this line intersects

substitute $\frac{-12}{5}x$ for y
$x^2+(\frac{-12}{5}x)^2=676$
$x^2+\frac{144}{25}x^2=676$
$\frac{25}{25}x^2+\frac{144}{25}x^2=676$
$\frac{169}{25}x^2=676$
times both sides by $\frac{25}{169}$
$x^2=100$
sqrt both sides, take positive and negative roots
x=+/-10

sub back

$y=\frac{-12}{5}x$
$y=(\frac{-12}{5})(10) \space\ or \space\ (\frac{-12}{5})(-10)$
$y=\frac{-120}{5} \space\ or \space\ \frac{120}{5}$
$y=-24 \space\ or \space\ 24$

the points are (10,-24) and (-10,24)

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3 years ago

If f(x) = 2x^2 + 1 and g(x) = x^2 - 7, find (f - g)(x).

zavuch27 [327]

2x squared +1 (-)x squared -7 is
a.) x squared +8

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