Anyone a math Genius?
simplify each radical expression.
-21_/27x^9

Answers

Answer 1

Answer: ok so according to comments, question is
$-21\sqrt{27x^(9)}$
remember that
$√(xy)$ = $√(x)$ times $√(y)$
and $\sqrt{yx^(2)}$ = $x√(y)$
so
$-21\sqrt{27x^(9)}$ = $-21√(27)\sqrt{x^(9)}$ = $-21√(9)√(3)\sqrt{x^(2)}\sqrt{x^(2)}\sqrt{x^(2)}\sqrt{x^(2)}√(x)$ = $-21(3)√(3)(x)(x)(x)(x)√(x)$ =
$-63x^(4)√(3)√(x)$ = $-63x^(4)√(3x)$

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At noon, train A leaves Bridgton headingeast at 90 mi/h to Cogsville. At 12:30 PM,
train B leaves Bridgton and heads east at
100 mi/h. At what time will train B catch
up to train A?

Answers

Train B will catchup to Train A at 5:30 PM.

We have,

d = distance covered by both trains when they meet

t = time it takes for train B to catch up to train A

For train A:

Distance = Speed × Time

d = 90t

For train B:

Distance = Speed × Time

d = 100(t - 0.5) (train B departs 30 minutes (0.5 hours) later than train A)

Since both equations represent the samedistance, we can set them equal to each other:

90t = 100(t - 0.5)

Let's solve for t:

90t = 100t - 50

10t = 50

t = 5

It will take 5 hours for train B to catchup to train A.

To determine the time when train B catches up to train A, we add the 5 hours to the departure time of train B, which is 12:30 PM:

12:30 PM + 5 hours = 5:30 PM

Therefore,

Train B will catchup to Train A at 5:30 PM.

Learn more about speed here:

brainly.com/question/7359669

#SPJ6

I'd say maybe by 5:30 b would

Evaluate the function at x = –2
A.y = –2
B.y = 0
C.y = 2
D.y = 3

Answers

- - C.

This is because if x=-2 then go to the -2 on the grid.

Now go up until the line reaches a point in the grid in which is "on" a number.
I have attached a picture explaining what I mean.
As you can see the line reached a point (on x=-2) and the answer is C.2 (Positive because it is on the higher end no the lower end.

The answer is equal C, y = 2.

A bottle rocket that was made in science class had a trajectory path that followed the quadratic equation y=-x^2+4x+6. What is the turning point of the rocket's path?1) (1,5)
2) (2,10)
3) (-2,-10)
4) (1,-5)

Answers

$y=-x^2+4x+6 \n \na =-1, \ b = 4 , \ c=6 \n \n The \ vertex \ is \ (x,f(x)) \n \nx=(-b)/(2a) =(-4)/(2\cdot (-1))=(-4)/(-2)=2\n \n f(2)=-x^2+4x+6 =-2^2+4 \cdot 2+6 =-4+8+6=10 \n \n The \ vertex \ is \ (2,10) \n \n \n Answer: \ 2) \ \ (2,10)$

Factor the polynomial.

54c3d4 + 9c4d2

Answers

$54c*3d^4+9c*4d^2$

$162cd^4+9c*4d^2$

$162cd^4+36cd^2$

Calcule a soma dos multplos positivos de 9 monores que 100

Answers

Calculate some two positive multiples of 9 less than 100.

Multiples of a whole number are found by taking a product of any counting number and that whole number.

Counting number whole number multiples
1 9 9
2 9 18
3 9 27
4 9 36
5 9 45
6 9 54
7 9 63
8 9 72
9 9 81
10 9 90
11 9 99

The multiples listed are all less than 100. You can choose which two positive multiples you want.

All real numbers less than 74.