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lord [1]
1 year ago
12

Expand and simplify bracket please quickly

Mathematics
1 answer:
natulia [17]1 year ago
4 0

Answer:

4y²-1/4 is the required answer

Step-by-step explanation:

(2y -  \frac{1 }{2} )(2y +  \frac{1}{2} ) \\ using \: formula \:  {x}^{2}  - y {}^{2}  = (x - y)(x + y) \\ 4y {}^{2}  -  \frac{1}{4}

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WILL MARK THE BRAINLIEST
Elis [28]

Answer:

Option D, 16/21

Step-by-step explanation:

<u>Step 1:  Add all of them together</u>

5 + 7 + 9

21

<u>Step 2:  Figure out how much of the plants are medicinal</u>

7 + 9

16

<u>Step 3:  Figure out the probability </u>

16/21

Answer:  Option D, 16/21

7 0
3 years ago
The rectangles shown are similar. What is the value of x?
drek231 [11]
Since the rectangles are similar. The ratio of their sides will be the same.

So, we can write:

x:18 = 4:6 \\  \\ &#10; \frac{x}{18}= \frac{4}{6} \\  \\   &#10;x =  \frac{4}{6}  * 18 = 12

Therefore, the left side of the bigger rectangle will be 12 units in length.
3 0
3 years ago
What is the value or (10^-3)(10^5)​
topjm [15]

Answer: 100

Step-by-step explanation:

(10^-3)(10^5)​

1/10^3*10^5 (I applied the negative power rule x^-a=1/x^a)

1/1,000*10^5

1/1,000*100,000

100,000/1,000=100

Hope this helps, HAVE A BLESSED AND WONDERFUL DAY! I also hope you had a great Superbowl Weekend! :-)

- Cutiepatutie ☺❀❤

7 0
3 years ago
47. A car travels at a constant speed of 50 miles per hour.
SIZIF [17.4K]

Answer:

The inverse of the given function is $t(d)=\frac{d}{50}$. The time taken to travel 180 miles is 3.6 hours.

Step-by-step explanation:

It is given that a car travels at a constant speed of 50 miles per hour. A function for distance traveled is also given as d(t)=50t.

It is required to find the inverse of the function by expressing the time travel in terms of distance traveled and also find t(180).

To find the inverse, express time traveled in terms of distance traveled using normal algebraic methods and then substitute 180 for t and explain its results.

Step 1 of 2

The given function is d(t)=50t.

Consider d(t) as d and t as t(d) and rewrite the equation.

The rewritten function is d=50 t(d)

Divide by 50 on both sides of the equation.

$$\begin{aligned}&d=50 t(d) \\&\frac{d}{50}=\frac{50 t(d)}{50} \\&t(d)=\frac{d}{50}\end{aligned}$$

Step 2 of 2

Substitute 180 for $t$ in the simplified expression and interpret the results.

$$\begin{aligned}&t(d)=\frac{d}{50} \\&t(d)=\frac{180}{50} \\&t(d)=3.6\end{aligned}$$

The time taken to travel 180 miles is 3.6 hours.

3 0
2 years ago
True or false? And why? The value of |x +1| is greater than or equal to 0
goldfiish [28.3K]

True.

The absolute value of anything is the distance that value is away from zero.

For instance, |-5 + 1| = 4

As we can see, any number that we plug into this equation will always be a number equal to or greater than zero.

4 0
3 years ago
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