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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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9

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Of the $2400 Mr Calvin earned, he spent 3/8 on food, 1/3 on taxes and 1/6 on other expenses. Find out how much all this is in do
sattari [20]

Answer: $300

Step-by-step explanation:

Mr. Calvin earned  \$2400

He spent  \frac{3}{8} on food i.e.

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\dfrac{1}{6}\ \text{on other expenses i.e.}\\\\\Rightarrow \dfrac{1}{6}\times 2400=\$400

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7 0
3 years ago
Dana can type nearly 90 words per minute. Use this information to find the number of hours it will take her to type 2.6 x 105 wo
Vlad1618 [11]

Dana can type 90 words per minute.

Since, 1 minute = \frac{1}{60} hours

Therefore, number of words she can type = \frac{90}{\frac{1}{60}}

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                                                                      = 5400 words per hour

If she types 2.6\times 10^5 words in 'x' hours.

Number of words Dana types with the given speed in 'x' hours = Speed of typing × Time

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Therefore, 5400\times x =2.6\times 10^5

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Therefore, Dana types 2.6\times 10^5 words in 48.15 hours.

Learn more,

brainly.com/question/621754

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3 years ago
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Simora [160]

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