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2 years ago

Pleasee, whats the substitution of 9x+2y=-3 and -9x-y=-3

Mathematics

1 answer:

Lubov Fominskaja [6]2 years ago

4 0

Answer: (1,-6)

Step-by-step explanation:

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The width of a rectangle is 2x ^2 +9x -7 and length is x^2 -9

lesantik [10]

Answer:

63 - 81x - 25x² + 9x³ + 2x⁴

Step-by-step explanation:

Multiply the two polynomials to arrive at your answer I guess, since this was not specific enough.

I am joyous to assist you anytime.

7 0

2 years ago

Tom throws a ball into the air. The ball travels on a parabolic path represented by the equation , where represents the height o

tigry1 [53]

Answer:

2.5 second

Step-by-step explanation:

The equation is missing in the question.

The equation is, $h=-8t^2+40t$ , where 'h' is the height and 't' is time measured in second.

Now we know to reach its maximum height, h in t seconds, the derivative of h with respect to time t is given by :

$\frac{dh}{dt} =0$

Now the differentiating the equation with respect to time t, we get

$\frac{dh}{dt}=\frac{d}{dt}(-8t^2+40t)$

$\frac{dh}{dt}=-16t+40$

For maximum height, $\frac{dh}{dt} =0$

So, $-16t+40=0$

$\Rightarrow 16t=40$

$\Rightarrow t=\frac{40}{16}$

$\Rightarrrow t = 2.5$

Therefore, the ball takes 2.5 seconds time to reach the maximum height.

7 0

3 years ago

A football team loses 4 yards on one play and 7 yards on another play. Write a sum of negative integers to represent this situat

Shtirlitz [24]

Answer:

-11 yards

Step-by-step explanation:

the first loss is represented by -4 and the second loss is represented by -7.

The sum of negative numbers will be:

(-4) + (-7) = -11

3 0

3 years ago

PLEASE HELP ASAP

Svetradugi [14.3K]

Answer:

(y+2)=2(x−3)

(y−4)=2(x-6)

y=2x−8

Step-by-step explanation:

4 0

1 year ago

Read 2 more answers

Volume of a cone = r²h,

inessss [21]

Answer:

7.5 m 457.5 $\pi$ $m^{2}$

Step-by-step explanation:

First, visualize the original cone and the smaller cone as overlapping similar triangles. The scale factor of the original cone to the smaller cone is 50:40, so if the smaller cone has a radius of 6 m, then the radius of the original cone would be 7.5 m.

The volume of the frustum is the volume of the original cone minus the volume of the smaller cone. The formula for the volume of a cone is V = $\frac{1}{3} \pi r^{2}h$ .

Original Cone = $\frac{1}{3} \pi r^{2}h$ = $\frac{1}{3} \pi *7.5^{2}*50$ = 937.5 $\pi$

Smaller Cone = $\frac{1}{3} \pi r^{2}h$ = $\frac{1}{3} \pi *6^{2}*40$ = 480 $\pi$

Frustum = 937.5 $\pi$ - 480 $\pi$ = 457.5 $\pi$

6 0

1 year ago