Answer:
D. 18
Step-by-step explanation:
- multiply both sides by 9/2, the reciprocal of 2/9.
4×(9/2)=x
- express 4×(9/2) as a single fraction.
4×9/2=x
- multiply 4 and 9 to get 36.
36/2=x
- divide 36 by 2 to get 18.
18=x
- swap sides so that all variable terms are on the left hand side.
x=18
Recall that the sum of all interior angles in a triangle is 180°, and that a flat-line is always 180°.
Check the picture below.
Answer:
-37
Step-by-step explanation:
Simplifying
74 + 2x = 0
Solving
74 + 2x = 0
Move all terms containing x to the left, all other terms to the right.
Add '-74' to each side of the equation.
74 + -74 + 2x = 0 + -74
Combine like terms: 74 + -74 = 0
0 + 2x = 0 + -74
2x = 0 + -74
Combine like terms: 0 + -74 = -74
2x = -74
Divide each side by '2'.
x = -37
Simplifying
x = -37
Answer:
x = 0 x= -9
Step-by-step explanation:
x^2 + 18x = 9x
Subtract 9x from each side
x^2 + 18x-9x = 9x-9x
x^2 +9x = 0
Factor x from the left hand side
x(x+9) =0
Using the zero product property
x=0 x+9 = 0
x =0 x+9-9 = 0-9
x = 0 x= -9
Answer:
None of them are whole numbers. Whole numbers are numbers that don’t need fraction bars or decimals or roots.
