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Julli [10]
3 years ago
15

-6y + 3(12y) = 20(y - 1) + 15 is it true?

Mathematics
1 answer:
xxMikexx [17]3 years ago
5 0

Answer:

y= - 1/2 (negative half) =  -0.5

Step-by-step explanation:

−6y+3(12y)=20(y−1)+15

Multiply 3 and 12 to get 36.

−6y+36y=20(y−1)+15

Combine −6y and 36y to get 30y.

30y=20(y−1)+15

Use the distributive property to multiply 20 by y−1.

30y=20y−20+15

Add −20 and 15 to get −5.

30y=20y−5

Subtract 20y from both sides.

30y−20y=−5

Combine 30y and −20y to get 10y.

10y=−5

Divide both sides by 10

y= -5/10

Reduce the fraction -5/10 = -0.5 to lowest terms by extracting and cancelling out 5 .

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4 years ago
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A grandmother says that her grandson is two years older than her granddaughter and that together they are at least 12 years old.
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Answer:

her grandson would be 7 and her granddaughter would be 5.

Step-by-step explanation:

their ages together is 12. we divide that by the two grandchildren, and adjust it to where they are to years apart.

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6+6 + adjusted = 5 and 7.

to fact check 5+7=12, and 7 is two numbers above 5.

7 0
3 years ago
The circumference of a circular field is 194.68 yards. What is the radius of the field? Use 3.14 for in and do not round your an
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8 0
4 years ago
About​ ______% of the area is between z= -1 and z= 1 ​(or within 1 standard deviation of the​ mean)? How do you solve this?
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Answer:

68%

Step-by-step explanation:

<em><u>68-95-99.7% Rule:</u></em>

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This is the empirical rule which is used to remember the percentage of values that is within a band of the mean. We say:

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Clearly, from the empirical rule, we see that about 68% of the area is between z = -1 and z = 1 (or within 1 standard deviation of the mean)

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