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jenyasd209 [6]
4 years ago
5

CAN SOMEONE HELP ME ON THIS

Mathematics
1 answer:
laila [671]4 years ago
5 0
We apply the formula of distance between points:
 d = root ((x2-x1) ^ 2 + (y2-y1) ^ 2)
 We have then:
 For WX:
 WX = root ((- 3 - (- 10)) ^ 2 + (- 1-4) ^ 2)
 WX = 8.602325267
 For XY:
 XY = root ((- 5 - (- 3)) ^ 2+ (11 - (- 1)) ^ 2)
 XY = 12.16552506
 For WY:
 WY = root ((- 5 - (- 10)) ^ 2+ (11-4) ^ 2)
 WY = 8.602325267
 The triangle is isosceles because it has two equal sides.
 Answer:
 
WX = 8.60
 
XY = 12.17
 
WY = 8.60
 
Isosceles
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Answer: 101.69

Step-by-step explanation:

Formula we use to find the z-score :-

z=\dfrac{x-\mu}{\sigma}    (1)

Given : \mu=90

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Daniel's z score : z= 1.67

Let x be the raw score for Daniel's exam grade, then substitute the values of \mu,\ \sigma\ and \ x in (1), we get

1.67=\dfrac{x-90}{7}\\\\\Rightarrow\ x-90=7\times1.67\\\\\Rightarrow\ x=11.69+90=101.69

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