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3 years ago

Just need someone to explain how I simplified it to -2a+15b/ 4

Mathematics

2 answers:

nikitadnepr [17]3 years ago

6 0

Answer:

Step-by-step explanation:

3(4a + 6b) = 3*4a + 3*6b = 12a + 18b

-2(7a + b) = -2*7a + (-2)*b = -14a - 2b

$\frac{5[3(4a+6b)-2(7a+b)-b]}{20}=\frac{5[12a+18b-14a-2b-b]}{20}\\\\ \frac{5[-2a+15b]}{20}=\frac{15b-2a}{4}$

x =1/4

Shtirlitz [24]3 years ago

4 0

X = 1/4 ?

since multiplying fractions is straight across,

1/4 * (15b -2a) would result in the simplification you got.

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Determine the radius and center of the circle with the following equation x^2+y^2-12x+24y-10=6

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Answer:

Center: (6, -12)

Radius: 4

Step-by-step explanation:

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Comparing with the standard form equation $(x-h)^2+(y-k)^2=r^2$ , since $r^2=196$ , then the radius of the circle is $r=14$ . Also, the center of the circle would be $(h,k)\rightarrow(6,-12)$ .

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2 years ago

e. Translate the word problem below into an equation; then solve. It only takes Vera 2 hours to sew 1 dress, but it takes Ivy 4

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Using the together rate, it is found that it would take them 16 hours to sew 12 dresses.

<h3>What is the together rate?</h3>

The together rate is the sum of each separate rate.

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Ivy's rate is of 1/4.

Hence, the together rate is the time it would take them to produce one dress working together, and is given by:

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2 years ago

The cost of going to a drive-in movie theater is $5. 50 per person plus $2. 75 per car. Use the dropdown menu to create an algeb

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The algebraic equation which shows that the number of x people can go to the drive-in with one car for $19. 25 is,

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<h3>How to write algebraic equation?</h3>

Algebraic equation are the expression which consist the variables, coefficients of variables and constants.

The algebraic expression are used represent the general problem in the mathematical way to solve them.

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Use constant numbers for the fixed values.

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Hence, the algebraic equation which shows that the number of x people can go to the drive-in with one car for $19. 25 is,

$5.50x+2.75=19.25$

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2 years ago

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