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Zinaida [17]
3 years ago
14

A statistics teacher was interested in the relationship between the number of days students waited to start a project and the sc

ore that project received (out of 100 points). Information was collected on several students and was used to obtain the regression equation y = –3.64x + 96.5, where x represents the number of procrastination days and y is the predicted grade. What is the predicted grade of a student who procrastinated for 2 days?
25.96
85.58
89.22
103.78
Mathematics
2 answers:
seraphim [82]3 years ago
8 0
25.96
85.58
89.22
103.78
Aleks [24]3 years ago
4 0

Answer:

89.22

Step-by-step explanation:

just plug in 2 to the x in a calc like so: -3.64(2)+96.5 and it will give you 89.22 . got it right on my quiz like 5 min ago sooo yeah hope this helps people in the future.

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Given the information, you can only write an expression and simplify it:

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kolezko [41]

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3 years ago
X, Y and Z form the vertices of a triangle. XY = 12.4m, XZ = 10.4m and YZ = 8.7m. Find the angle ∠ YXZ rounded to 1 DP.
sweet-ann [11.9K]

Answer:

43.8°

Step-by-step explanation:

Applying,

Cosine rule,

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