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aliya0001 [1]
3 years ago
6

50 Points

Mathematics
2 answers:
KonstantinChe [14]3 years ago
8 0

Answer:

A) x = 15

Step-by-step explanation:

4x - 30 = 2x

subtract 2x from each side of the equation:

2x - 30 = 0

add 30 to each side:

2x = 30

x = 15

mixas84 [53]3 years ago
6 0

Answer:

\displaystyle A)  {15}^{ \circ}

Step-by-step explanation:

remember that,

<u>when</u><u> </u><u>a </u><u>transversal</u><u> </u><u>crosses</u><u> </u><u>two </u><u>parallel</u><u> lines</u><u> </u><u>then </u><u>the</u><u> </u><u>Alternate</u><u> </u><u>interior</u><u> angles</u><u> </u><u>are</u><u> </u><u>equal</u><u> </u>that is being said

\displaystyle 4x - 30 = 2x

cancel 2x from both sides:

\displaystyle 2x - 30  = 0

add 30° to both sides:

\displaystyle 2x  = 30

divide both sides by 2:

\displaystyle x  =15

hence

our answer is A)

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Answer:

And then SSY=SS_{total}=\sum_{j=1}^n (y_j-\bar y)^2 =240  

C. 240

Step-by-step explanation:

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Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".  

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