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grandymaker [24]
3 years ago
10

4y^2 + 2 =38 Help with work would be greatly appreciated

Mathematics
2 answers:
DIA [1.3K]3 years ago
5 0

4y^2 + 2 - 2 = 38 - 2 (subtract both side by 2)

4y^2 = 36

Divide by 4:

y^2 = 9

y = \sqrt{9}

y = 3

Reil [10]3 years ago
4 0

Note the equal sign. What you do to one side, you do to the other. Do the opposite of PEMDAS.

First, subtract 2 from both sides

4y² + 2 (-2) = 38 (-2)

4y² = 38 - 2

4y² = 36

Next, divide 4 from both sides

(4y²)/4 = (36)/4

y² = 36/4

y² = 9

Finally, root both sides to fully isolate the y.

√y² = √9

y = √9

√9 = √3 x √3 = 3

y = 3

3 is your answer for y

hope this helps

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Given: Length of lamp post= 12-foot.

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Cross multiplying both side and using the value of Tan 60°

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