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3 years ago

MULTIPLY.....WILL MARK BRAINLIESTx^2(-10x^2+1)

Mathematics

1 answer:

Tanya [424]3 years ago

5 0

Answer:

Step-by-step explanation:

Distributive property: a(b + c) = a*b +a*c

$a^{m}*a^{n}=a^{m+n}\\\\\\x^{2}(-10x^{2}+1)= x^{2}*(-10x^{2}) +x^{2}*1\\\\=-10x^{(2+2)}+ x^{2}\\\\= -10x^{4} + x^{2}$

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Help plzzzzz.............

ludmilkaskok [199]

Answer:

a) 3 b) y = 3x + 11

Step-by-step explanation:

In order to find the gradient (slope), find the change in y or change in x (rise/run).

-2 - 2 / 7 - (-5)

-2 - 2 / 7 + 5

-4/12 = -1/3

Now that we know the gradient of line AB is -1/3, take the opposite reciprocal of that to find the gradient perpendicular to line AB.

-1/3 ⇒ 3

Take point C's values and the perpendicular gradient found earlier and substitute them into the point-slope form equation.

y - 5 = 3(x - (-2))

y - 5 = 3(x + 2)

y - 5 = 3x + 6

y = 3x + 11

7 0

3 years ago

Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2 h, and Car B traveled the dista

lidiya [134]

Recall your d = rt, distance = rate * time.

notice, the distance are the same, say it was "d" miles.

and if car A is travelling at a speed of say "r" mph, then B is going at "r+15" mph.

$\bf \begin{array}{lccclll}
&\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{time}\\
&------&------&------\\
\textit{Car A}&d&r&2\\
\textit{Car B}&d&r+15&1.5
\end{array}
\\\\\\
\begin{cases}
\boxed{d}=2r\\
d=1.5(r+15)\\
----------\\
\boxed{2r}=1.5(r+15)
\end{cases}
\\\\\\
2r=1.5r+22.5\implies 0.5r=22.5\implies r=\cfrac{22.5}{0.5}\implies \boxed{r=\stackrel{mph}{45}}$

how far is B going? well, r + 15.

5 0

4 years ago

Read 2 more answers

Anyone know this problem?

USPshnik [31]

The answer is 2/3 because 21 ÷ 3 = 7, and 7 × 2 = 14. I hope this helps!

5 0

3 years ago

A right rectangular pyramid is sliced vertically (down) at the red line by a plane not passing through the vertex of the pyramid

crimeas [40]

The cross-section of a right rectangular pyramid will be shaped similar to the base, that is, a rectangle. Hence, 4th option is the right choice.

If the peak of the rectangular pyramid is directly above the center of the base, it creates a perpendicular to the base, indicating the height of the pyramid. This type of rectangular pyramid is known as the right rectangular pyramid.

A rectangle is a quadrilateral, that is a closed figure with 4 line segments, with all four interior angles at 90°.

When we slice a right rectangular pyramid vertically down at the red line by a plane, not passing through the vertex, of the pyramid will be a dilated image of its base.

A dilated image is an enlarged or diminished image of the preimage, similar with all angles.

Thus, the cross-section of a right rectangular pyramid will be shaped similar to the base, that is, a rectangle. Hence, 4th option is the right choice.

Learn more about right triangular pyramids at

brainly.com/question/27658401

#SPJ4

For complete question, refer to the attachment.

5 0

2 years ago

Find the value of y. 4 5 7 2

Debora [2.8K]

Angles (7x+17)° and (5x-5)° are consecutive interior angles, that means they add up to 180°.
So we can make an equation to solve for x, which eventually will help us solve for y.
180 = (7x+17) + (5x -5)

re arrange that:
180 = 7x + 5x + 17 - 5

180 = 12x + 12
- 12 -12

168 = 12 x
 12 12

14 = x

Now we will plug it into (5x - 5) to help us solve for y,
Angle (5x - 5) and (23y) are supplementary angles, meaning they equal to 180°.
 180 = (23y) + (5(14) - 5)

180 = (23y) + (70 - 5)

180 = 23y + 65
- 65 - 65

115 = 23y
23 23

___ = y

Good luck!

4 0

3 years ago

MULTIPLY.....WILL MARK BRAINLIESTx^2(-10x^2+1)​

MULTIPLY.....WILL MARK BRAINLIESTx^2(-10x^2+1)