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vichka [17]
3 years ago
8

If a person drives 75 miles in two hours, how long would it take in five hours? What it be at 17 hours?

Mathematics
2 answers:
loris [4]3 years ago
7 0
75 miles in 2 hours means
37.5 in 1 hour
So
37.5*5 miles in 5 hours
187.5 miles
And 
37.5*17 miles in 17 hours
637.5 miles

lapo4ka [179]3 years ago
3 0
4 1/2 hour if 2 hours was 75 another 2 hours would be 4 hours and the remaining hour would be 1/2 because they are basing by every two hours
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Find the value of x² - x+1 when x=√3 -1, in the form a+b√3 where a and b are integers​
lidiya [134]

Answer:

6-3\sqrt{3}

If you compare this to a+b\sqrt{3}, then a=6 and b=-3.

Step-by-step explanation:

We are given x=\sqrt{3}-1 and we are asked to find the value of x^2-x+1.

So we will need to find x^2.

x=\sqrt{3}-1

Square both sides:

x^2=(\sqrt{3}-1)^2

Expand using identity: (x-a)^2=x^2-2ax+a^2.

x^2=(\sqrt{3})^2-2(\sqrt{3})(1)+1^2

x^2=3-2\sqrt{3}+1

x^2=4-2\sqrt{3}

Let's go back to the full x^2-x+1.

x^2-x+1

(4-2\sqrt{3})-(\sqrt{3}-1)+1

4-2\sqrt{3}-\sqrt{3}+1+1

6-3\sqrt{3}

If you compare this to a+b\sqrt{3}, then a=6 and b=-3.

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3 years ago
How many months are in 59 days???
noname [10]

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7 0
2 years ago
There are 18 female teachers and 5 male teachers at Ashley's school. What is the ratio of the number of female teachers to the n
elena-14-01-66 [18.8K]

Answer:

The ratio of the number of female teachers to the number of male teachers is 18:5.

Step-by-step explanation:

First: Review how to write a ratio:

To write a ratio, take the two quantities, and put them on both sides of a colon (:). So, our two quantities our 18 and 5. But, they need to be in a specific order:

There are 18 female teachers and 5 male teachers at Ashley's school. What is the ratio of the number of female teachers to the number of male teachers?

Since, they mentioned the number of female teachers first, we put the quantity of female teachers first. So we will write 18 first and 5 after. So, the ratio is 18:5.

Thank you for reading

Topic: Ratios

6 0
2 years ago
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aleksandrvk [35]
Let the numbers be x and y.
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out of the above, only (6,60) and (12,30) satisfy both conditions. Thus our answer is:
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