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disa [49]
3 years ago
7

5(y-4)=7(2y+1)I need the answer​

Mathematics
1 answer:
8_murik_8 [283]3 years ago
8 0

Answer: y = -3

Move all terms containing y to the left, all other terms to the right

<u>Add -14y to each side of the equation</u>

<u></u>-20 + 5y + -14y = 7 + 14y + -14y<u></u>

<u></u>

<u>Combine like terms: 5y + -14y = -9y </u>

<u></u>-20 + -9y = 7 + 14y + -14y<u></u>

<u></u>

<u>Combine like terms: 14y + -14y = 0 </u>

<u></u>-20 + -9y = 7 + 0\\-20 + -9y = 7<u></u>

<u></u>

<u>Add '20' to each side of the equation</u>

<u></u>-20 + 20 + -9y = 7 + 20<u></u>

<u></u>

<u>Combine like terms: -20 + 20 = 0 </u>

<u></u>0 + -9y = 7 + 20\\-9y = 7 + 20<u></u>

<u></u>

<u>Combine like terms: 7 + 20 = 27 </u>

<u></u>-9y = 27<u></u>

<u></u>

<u>Divide each side by -9</u>

<u></u>-9y/9=27/-9\\y=-3<u></u>

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The product of side length and altitude is area. The area remains the same regardless of how you measure it.

From the first side and altitude,
.. area = side*altitude = (4.2 cm)*(3.6 cm) = 15.12 cm^2
From the second side and altitude
.. area = side*altitude
.. 15.12 cm^2 = side*(2.4 cm)
.. side = (15.12 cm^2)/(2.4 cm) = 6.3 cm

The perimeter is the sum of the measures of all sides. Opposite sides are of equal measure.
.. perimeter = 2*(4.2 cm +6.3 cm) = 21.0 cm
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3 years ago
PLEASE HELP ASAP WILL GIVE BRAINLIEST!
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Answer:

1.01

Step-by-step explanation:

Mean with outliner = (39.55 + 40.51 + 41.01 + 37.76+ 35.32 + 33.28 + 34.38 + 36.48 + 39.87 + 50.32 + 40.59 + 41.71)/12 = 39.23 seconds.

In this case, the outlier comes to be the data: 50.32. If we don't consider that data point, the mean equals:

Mean wihout outliner = (39.55 + 40.51 + 41.01 + 37.76+ 35.32 + 33.28 + 34.38 + 36.48 + 39.87 + 40.59 + 41.71)/11 = 38.22

The difference is:  39.23 - 38.22 = 1.01

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Your high school freshman class consists of 760 students. In recent years, only 4 out of 7 students actually graduated in four y
IceJOKER [234]

Answer:

434

Step-by-step explanation:

760 * (4/7)= 434.3

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Joe can drive 194 miles in 4 hours. At the same<br> rate, how far can he drive in 6 hours.
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Answer:

Lets take the miles for 6 hours to be x.

Using cross-multiplication, this problem can be solved.

194              4

x                  6

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Therefore, Joe drives 291 miles in 6 hours.

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