Answer:
a) 8 x 10^3 or 8000
b) 8 x 10^-2 or .08
Explanation: Refer to a guide on rounding sig figs
Answer:
11/9
Step-by-step explanation:
Answer:
x=56 and the exterior angle is 116
Step-by-step explanation:
We will call the unknown angle in the triangle y. Angle y and the angle (2x +4) form a straight line so they make 180 degrees.
y + 2x+4 =180
Solve for y by subtracting 2x+4 from each side.
y + 2x+4 - (2x+4) =180 - (2x+4)
y = 180-2x-4
y = 176-2x
The three angles of a triangle add to 180 degrees
x+ y+ 60 = 180
x+ (176-2x)+60 = 180
Combine like terms
-x +236=180
Subtract 236 from each side
-x+236-236 = 180-236
-x = -56
Multiply each side by -1
-1*-x = -56*-1
x=56
The exterior angle is 2x+4. Substitute x=56 into the equation.
2(56)+4
112+4
116
Answer:
A.657 square inches B. 844 Square inches C. option B
Answer:
3, -1/2
Step-by-step explanation:
(4x – 5)^2 = 49
Take the square root of each side
sqrt((4x – 5)^2) = ±sqrt(49)
4x-5 = ±7
Add 5 to each side
4x -5 + 5 = 5 ±7
4x = 5±7
Divide each side by 4
4x/4 = (5±7)/4
x = (5±7)/4
First take the positive
x =( 5+7) /4 = 12/4 = 3
Then the negative
x = (5-7) /4 = -2/4 = -1/2
