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Stells [14]
3 years ago
13

2x-21+6=x-3. How would you solve this

Mathematics
1 answer:
Harman [31]3 years ago
4 0

Step-by-step explanation:

2x-21+6=x-3

  • 2x-15=x-3
  • 2x-x=-3+15
  • x=12

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Solve 4 + 2 sinx= 14-8 sinx for 0° ≤ x ≤ 180
Oduvanchick [21]
<h2>Answer:</h2>

<u>x= 90°</u>.

<h2>Step-by-step explanation:</h2>

<h3>1. Write the expression.</h3>

4 + 2 sin(x)= 14-8 sin(x)

<h3>2. Subtract "4" from both sides of the equation.</h3>

-4+4 + 2 sin(x)= 14-8 sin(x)-4\\ \\2 sin(x)= 10-8 sin(x)

<h3>3. Add "8sin(x)" to both sides of the equation.</h3>

2 sin(x)+8 sin(x)= 10-8 sin(x)+8 sin(x)\\ \\10 sin(x)= 10

<h3>4. Divide both sides by 10.</h3>

\frac{10 sin(x)}{10} = \frac{10}{10} \\ \\sin(x)=1

<h3>5. Apply the arcsin of sin^-1 to both sides of the equation.</h3>

arcsin(sin(x))=arcsin(1)\\ \\x=90

<h3>6. Conclude.</h3>

<u>x= 90°</u>.

3 0
1 year ago
Which of these strategies would eliminate a variable in the system of equations? ​8x+8y=2 8x+5y=1 ​ Add the equations. (Choice B
harkovskaia [24]

Answer:

B. Subtract the bottom equation from the top equation.

Step-by-step explanation:

When looking at the two equations:

8x + 8y = 2

8x + 5y = 1

We can easily get rid of the x variable by subtracting the two equations from each other since the terms are equivalent. This would allow us to solve for the y value, which we could plug into the an equation to solve for the x value.

7 0
3 years ago
Read 2 more answers
Which equation is represented by the table? x y (x, y) 0 2 (0, 2) 1 –1 (1, –1) 2 –4 (2, –4) A. y = –2x B. y = x – 1 C. y = 2x D.
SashulF [63]
Answer:  [D]:    y  =  -3x  +  2  .
__________________________________________________
4 0
3 years ago
You plan to replace the carpeting in the room shown. What is the area of the room
LenaWriter [7]
Answer: 198 ft^2

total Area = Area of rectangle + area of trapzoid
= base*height + .5(b1+b2)*height

9*18+.5(9+3)6
162+36
198
8 0
4 years ago
Having a hard time with this one.
Vladimir79 [104]

answer for this question is 1/16

3 0
3 years ago
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