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Ahat [919]
3 years ago
13

Simplify i will give u 15 points instead of 10

Mathematics
1 answer:
Anit [1.1K]3 years ago
5 0

Hello,

First of all , let's see that

4=2^2\leq 5\leq 9=3^2\\\\2\leq \sqrt{5}\leq 3\\ \\\text{so } (1-\sqrt{5})\leq 0\\ \\\\\text{Then } \sqrt{(1-\sqrt{5})^2}=|1-\sqrt{5}|=\sqrt{5}-1

So,

\sqrt{6(1-\sqrt{5})^2}=\sqrt{6}(\sqrt{5}-1)=\sqrt{30}-\sqrt{6}

Thanks

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Patrick is driving form Sydney to Canberra. He travels for 288km trip in 4 hours. What's his average speed?
nika2105 [10]

Answer:

v = 72 km/h

Step-by-step explanation:

Given that,

The distance covered by the Patrick, d = 288 km

Time taken, t = 4 hours

We need to find the average speed of Patrick. We know that the average speed of an object is equal to the total distance covered divided by total time taken. Let it is v. So,

v=\dfrac{d}{t}\\\\v=\dfrac{288\ km}{4\ h}\\\\v=72\ km/h

So, his average speed is equal to 72 km/h.

3 0
3 years ago
The distance on a bike path between Westfield and Southborough is 46 mi. Tracey leaves Westfield heading to Southborough cycling
ipn [44]

Answer: 2 hr.

Explanation: Think back to rate of change. <em>d</em> = <em>rt</em>, <em>r</em> = <em>d/t</em>, <em>t</em> = <em>d/r</em>. In this case, we will be using <em>d</em> = <em>rt</em>. Mph would be <em>r</em>, rate, so you would categorize 15 mph and 8 mph under rate. <em>t</em> should represent the time each cyclist traveled. Tracey's and Emma's distance, <em>d</em>, would be the same as their mph, hence Tracey's being 15<em>t</em> and Emma's would be 8<em>t</em>. When you add Tracey's distance plus Emma's distance, you end up with 46 mi. Now, you need to combine like terms, which should look like 15<em>t</em> + 8<em>t </em> = 46. Add 15 and 8 to get 23, so it should be 23<em>t</em> = 46 now. Then, divide both sides of the equation by 23 and now you should have your answer, <em>t</em> = 2 hr.

8 0
3 years ago
Read 2 more answers
This is for my Precalculus teacher and I am kinda confuse, help please!!
Andrews [41]

Answer:

They are different

6 0
3 years ago
In detail explain how to multiply in binomial of (5x-7 (2x-1) in foil method
Nesterboy [21]

Step-by-step explanation:

First

Outer

Inner

Last

First- 5x*2x=10x^2

Outer-5x*-1= -5x

Inner--7*2x= -14x

Last- -7*-1= 7

10x^2-5x-14x+7

you can simplify it further however thats the answer

4 0
3 years ago
Need help :))))))))
tatiyna

easy

No need to explain

6 0
3 years ago
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