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Dahasolnce [82]
3 years ago
10

Please help me with number 1 to 6 please

Mathematics
1 answer:
Ugo [173]3 years ago
8 0
1.) 144
2.) 8
3.) 262.5
4.) 36
5.) 630
6.) 440
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Write (x+1)÷x-(y+1)÷y as a simplified fraction ​
mina [271]

Answer:

\frac{y-x}{xy}

Step-by-step explanation:

y - x / xy

8 0
3 years ago
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George observes that for every increase of 1 in the value of x, there is a increase of 60 in the corresponding value of y. He cl
Brums [2.3K]

Hi there!

<u><em>FACTS</em></u><em> :</em>

<em>To see if multiple ratios are proportional, you can write them as fractions, reduce them, and compare them. If the reduced fractions are all the same, then you have proportionnal ratios. You can also write them as fractions and divide the numerator (top number) by its denominator (bottom number), and compare the decimal numbers the same way you would compare the fractions (I personnaly find this method easier because you don't need to simplify the fractions).</em>

<u>STEPS TO ANSWER:</u>

x = 1 ; y = 90 → \frac{1}{90} = 1 ÷ 90 = <u>0.01111111...</u>


x = 2 ; y = 150 → \frac{2}{150} = 2 ÷ 150 = <u>0.0133333...</u>


x = 3 ; y = 210 → \frac{3}{210} = 3 ÷ 210 = <u>0.01428571</u>


x = 4 ; y = 270 → \frac{4}{270} = 4 ÷ 270 = <u>0.0148148...</u>


x = 5 ; y = 330 → \frac{5}{330} = 5 ÷ 330 = <u>0.01515152</u>


<em>** You didn't really need to calculate them all because even the first two decimal numbers weren't equivalent, but I wanted to show you the whole process so I calculated them all.</em>


⇒ If you compare all the decimals you got, you can easily see that they are not the same, which means that the ratios between the values of "x" and the values of "y" are not proportional. Therefore, George's reasoning wasn't good.


There you go! I really hope this helped, if there's anything just let me know! :)

5 0
4 years ago
Ppllslslssllslslssl. awaaawwwwnnnssseeeerr thhhhhiissssss pplllslsssllslsls
Vlad1618 [11]
D is the correct answer
3 0
3 years ago
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The distribution of SAT scores of all college-bound seniors taking the SAT in 2014 was approximately normal with a mean of 14971
RideAnS [48]

Answer:

P(X<1200) is 0.8212

Step-by-step explanation:

Test statistic (z) = (X - mean)/sd

X is score of a tester = 1200

mean = 1497

sd = 322

z = (1200 - 1497)/322 = -297/322 = -0.92

The cumulative area of the test statistic is the probability that X<1200. The cumulative area is 0.8212.

Therefore, P(X<1200) = 0.8212

8 0
3 years ago
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Which angle measure has a tangent of 8.9352
Hunter-Best [27]
Tanθ = 8.9352

θ = tan⁻¹ (8.9352)

<span>θ </span>≈<span> 83.614</span>°
4 0
3 years ago
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