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Feliz [49]
4 years ago
7

Find the product of 21* (-12)​

Mathematics
1 answer:
Lynna [10]4 years ago
7 0

Answer: 252

Step-by-step explanation: 21x-12=252

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Joseph and Molly each have coin collections.
Ugo [173]

Answer:

Joseph has 175

Molly has 275

Step-by-step explanation:

y = 15x + 25

y = 25x + 25

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3 years ago
The scores of individual students on the american college testing (act) program composite college entrance examination have a no
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The mean of the distribution of the sampling mean is the same as the mean of the population, 18.6.
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PLEASE HELP MEEEEe<br> jhchnthnht
Mars2501 [29]

The equation of the perpendicular bisector of BC with B(-2, 1), and C(4, 2) is y = 7.6 - 6•x

<h3>Which method can be used to find the equation of the perpendicular bisector?</h3>

The slope, <em>m</em>, of the line BC is calculated as follows;

  • m = (2 - 1)/(4 - (-2)) = 1/6

The slope of the perpendicular line to BC is -1/(1/6) = -6

The midpoint of the line BC is found as follows;

\left( - 2 +  \frac{4 - ( - 2)}{2}, \: 1 +  \frac{2 - 1}{2}   \right) = (1,\: 1.5)

The perpendicular bisector is the perpendicular line constructed from the midpoint of BC.

The equation of the perpendicular bisector in point and slope form is therefore;

(y - 1.5) = -6•(x - 1)

y - 1.6 = -6•x + 6

y = -6•x + 6 + 1.6 = 7.6 - 6•x

Which gives;

  • y = 7.6 - 6•x

Learn more about equations of perpendicular lines here:

brainly.com/question/11635157

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6 0
2 years ago
Slove the equation V=(20-2x)(15-2x)(x) for V
Schach [20]

Answer:

V = 300x + -70x2 + 4x3

Step-by-step explanation:

Simplifying

V = (20 + -2x)(15 + -2x)(x)

Reorder the terms for easier multiplication:

V = x(20 + -2x)(15 + -2x)

Multiply (20 + -2x) * (15 + -2x)

V = x(20(15 + -2x) + -2x * (15 + -2x))

V = x((15 * 20 + -2x * 20) + -2x * (15 + -2x))

V = x((300 + -40x) + -2x * (15 + -2x))

V = x(300 + -40x + (15 * -2x + -2x * -2x))

V = x(300 + -40x + (-30x + 4x2))

Combine like terms: -40x + -30x = -70x

V = x(300 + -70x + 4x2)

V = (300 * x + -70x * x + 4x2 * x)

V = (300x + -70x2 + 4x3)

Solving

V = 300x + -70x2 + 4x3

Solving for variable 'V'.

Move all terms containing V to the left, all other terms to the right.

Simplifying

V = 300x + -70x2 + 4x3

6 0
3 years ago
Please solve quickly ​
Crazy boy [7]

Answer:

75.36

hope this helps :)

5 0
2 years ago
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