Y^20=( )^2
1) y^4
2) y^5
3)y^10
4)y^12

Answers

Answer 1

Answer: y^20 = (?)^2

We want to find the missing number. Let's first think about how exponents are dealt with. If there are two exponents (ex: (z^5)^2) then the exponents multiply to find your new exponent (ex: z^10).

Therefore, we want the power of y to multiply by 2 and equal 20. The answer is 3) y^10.

(y^10)^2 = y^20

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What is the product of 4xy and y2 + 2x?4xy 3 + 4xy
4xy 2 + 8x 2y
4xy 3 + 8x 2
4xy 3 + 8x 2y

Answers

The product of 4xy and y² + 2x can also be written as
4xy(y² + 2x)

When we have brackets like this, we multiply whatever is left of the brackets by everything inside.

1) 4xy multiplied by y²
    4xy x y² = 4xy³

2) 4xy multiplied by 2x
    4xy x 2x = 8x²y

3) Add together 4xy³ and 8x²y
    4xy³ + 8x²y

A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of a blue marble, replacing it, and then picking a black marble?

8/75

4/45

1/9

Answers

There are 15 total marbles in the bag, of which 6 are blue nd 4 are black.

The probability of pulling a blue marble from the full bag is 6/15 .

The probability of pulling a black marble from the full bag is 4/15 .

The probability of both events happening is

(6/15) x (4/15) = 24/225 = 8/75

A souvenir maker wants to create a scale model of the Empire State Building. The Empire State Building is 1,472 feet tall and has a base with dimensions 286 ft by 286 ft. If the model is 6 in. tall, what are the approximate dimensions of its base in inches? (Round your answer to the nearest tenth of an inch.)A) 1.2 in. by 1.2 in.
B) 1 in. by 1 in.
C) 0.2 in. by 0.2 in.
D) 2.3 in. by 2.3 in.

Answers

It looks like this $1472x=6=\ \textgreater \ 6/1476=scale=.004076$ . So the answer is A) 1.2 in. by 1.2 in.

Solve x+2=1/2x-1 Please hurry!

Answers

Answer:

X = - 6

Step-by-step explanation:

x + 2 = 1/2x - 1

$2 + 1 = (1)/(2)x - x$

$3 = - (1)/(2)x$

$x = ( - 3)/( (1)/(2) ) \n x = ( - 6)/(1) \n x = - 6$

Hopethishelps:)

Algebra II. Radical expressions.: Multiply, and then simplify if possible. Show your work.

Answers

remember distributive property
a(b+c)=ab+ac
a(b-c)=ab-ac

also
law of exponents
$√(mn)$ = $√(n) √(m)$

and
(a-b)(a+b)=a^2-b^2 (for question 14)
and (a+b)^2=a^2+2ab+b^2 (for question 15)

11. $√(2x)(√(6x)-3√(x))$ = $\sqrt{12x^(2)}-3\sqrt{2x^(2)}$ = $2x√(3)-3x√(2)$

12. 108+(28∛21)

13. (-2√6)+(4√10)

14.√(2x-3)-49

15. 2x+(20√x)+50

16. (3∛2)-(6∛4)-16

17. 42x-6

Solución por favor ayuda