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kotegsom [21]
3 years ago
9

Find the value of y when x equals -7. -3x+6y=-21

Mathematics
1 answer:
labwork [276]3 years ago
7 0
You would substitute -7 wherever you see the x symbol

-3 x -7 +6y=-21
21+6y=-21

then you would move the 21 to the other side and when you move it the sign would change from a +21 to a -21.
so you would be left with
6y=-21-21
6y=-42

then you would take the 6 over and because it is being multiplied to the y on one side, it would divide on the other.

y=-42/6
y=-7
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Ne4ueva [31]
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2 years ago
Use the rule ƒ(x) = -2x + 3 to complete the statement. When x = 5, ƒ(x) = _____.
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Answer:

-7

Step-by-step explanation:

To solve this equation, plug your x value in and simplify.

-2x + 3

-2(5) + 3

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3 years ago
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In a swimming class, 2/5 of the participants are girls. there are 24 boys in the class. find the total number of participants in
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3 years ago
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Step-by-step explanation:

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3 years ago
The motorcycle engine on a kawasaki ninja 1000 has a displacement of 1043 cubic-centimeters (cm3). in order to calculate its eng
marishachu [46]

\boxed{\boxed{ \ 0.061 \frac{inch^3}{cm^3}\ }}

<h3>Further explanation</h3>

We will calculate the unit conversion factor used to convert its engine displacement from cubic-centimeters to cubic-inches.

The relationships between inch and cm are as follows:

\boxed{ \ 1 \ inch = 2.54 \ cm\ }

Inches and cm represent units of length.

Made into fractions, 1 inch as the denominator and 2.54 cm as the numerator.

\boxed{ \ \frac{1 \ inch}{2.54 \ cm} \ }

As a unit conversion factor of volume, the numerator and the denominator in cubic.

\boxed{ \ \frac{(1 \ inch)^3}{(2.54 \ cm)^3} \ }

\boxed{ \ \frac{1 \ inch^3}{16.387 \ cm^3} \ }

Thus, we get the unit conversion factor

\boxed{\boxed{ \ 0.061 \frac{inch^3}{cm^3}\ }}

Let's use this unit conversion factor to calculate its engine displacement in new units.

\boxed{= 1,043 \ cm^3 \times 0.061 \ \frac{inch^3}{cm^3}}

Note for cm³ units that have been crossed out.

The conversion result is \ \boxed{ \ 63.623 \ inch^3\ }

<h3>Learn more</h3>
  1. Convert cubic-kilometers to cubic-meters brainly.com/question/1446243
  2. How to write in scientific notation brainly.com/question/7263463
  3. Calculating mass based on density and volume brainly.com/question/4053884

Keywords: the motorcycle engine, Kawasaki Ninja 1000, 1043 cubic-centimeters (cm³), to calculate, its engine displacement, in cubic-inches (in³), what unit conversion factor

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3 years ago
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