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zavuch27 [327]
3 years ago
7

If a + 2b + 6c = -9 what is 12c + 2a + 4b

Mathematics
1 answer:
katrin [286]3 years ago
3 0

Answer:

-18

Step-by-step explanation:

Multiply the given equation by 2.

2(a +2b +6c) = 2(-9)

12c +2a +4b = -18

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Equation is equivalent to 4.5 = 2a?
nasty-shy [4]
<span>Simplifying 4.5 = 2a

Solving 4.5 = 2a
Solving for variable 'a'.
</span>
<span>Move all terms containing a to the left, all other terms to the right.
 Add '-2a' to each side of the equation. 4.5 + -2a = 2a + -2a
</span>
<span>Combine like terms: 2a + -2a = 0 4.5 + -2a = 0
</span>
<span>Add '-4.5' to each side of the equation.
4.5 + -4.5 + -2a = 0 + -4.5
</span>
<span>Combine like terms: 4.5 + -4.5 = 0.0
0.0 + -2a = 0 + -4.5
-2a = 0 + -4.5
</span>
<span>Combine like terms: 0 + -4.5 = -4.5
-2a = -4.5
Divide each side by '-2'.
a = 2.25
 Simplifying
a = 2.25

Let's check: 2 x 2.25 = 4.5
Next time, follow these steps and you will pass


Hope I helped :)
</span>
7 0
4 years ago
A rectangle has side lengths of 134 feet and 213 feet. Find the perimeter of the rectangle. Write your answer as a mixed number
Tamiku [17]

Answer:

8 1/6

Step-by-step explanation:

5 0
3 years ago
Solve the system of equations using elimination. 3x – 5y = –2 4x – 7y = –3
Stolb23 [73]
The answer to this question is Y=1 and X=1
7 0
3 years ago
Read 2 more answers
2. A circular patio has a diameter of 18 feet. How
lisabon 2012 [21]

Answer:  So to cover the patio it would take 255 whole tiles.  254.469 if you want to be exact.

Step-by-step explanation:

When finding flooring needed we are finding for area.  We know the formula for finding the area of a circle is A=\pi r^{2} so we plug in our known variables...

we know r because radius is half of diameter and diameter was given in problem.  So half of 18 is 9.

r=9

A=\pi 9^{2}

A=\pi81

A=254.469

8 0
3 years ago
A ball is thrown into the air with an upward velocity of 28ft/s. Its height h in feet after t seconds is given by the function h
Pavlova-9 [17]

Answer:

In bold below.

Step-by-step explanation:

Find derivative which gives the velocity:

V = h' = -32t + 28

At maxm height V = 0 so

-32t + 28 = 0

Time to reach maxm height t = -28/-32 = 0.875 seconds.

So maxm height

= -16(0.875)^2 + 28*0.875 + 8

= 20.25 ft.

5 0
3 years ago
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