A.
1 hour = 60 minutes ;
2 hour s= 120 minutes;
140 - 120 = 20 minutes ;
20 = 60 ÷ 3 ;
20 minutes represents ( 1 / 3 ) hour;
Then, 140 minutes represents 2 1 / 3 hours ;
2 1 / 3 = 7 / 3 = 2.(3) ;
B.
2.(3) > 2.3 ;
your friend underestimate the length of the movie ;
Answer:
x=25°, y=18°
Step-by-step explanation:
Solved! Here is the explanation. As we have supplementary angles, we have a total of 180° of angles. Angle BXD is a right angle, so 2x+40°=90°. 2x=50°, and then we have x=25°. Now, to figure out y, we have to look at angle BXA. In this case, 5y=90°. y=18°. So, x=25° and y=18°. Hope this explanation helps!
Answer:
Step-by-step explanation:
The answers are:
A) {[(-15+5)×2+8]-32÷8}-(-7)
Calculate within parentheses: -16 - (-7)
Add and subtract (left to right): -16 - (-7) = -9
B) (5-2)³×2+[-4+(-7)]÷(-2+4)²
To solve this problem, you need to follow the steps of order of operations.
Calculate within parentheses: 
* 2 + [-4 + (-7)] ÷ (-2+4)²
Calculate within parentheses: *2 -11 ÷ (-2+4)²
Calculate within parentheses: 27 × 2 - 11 ÷ (-2+4)²
Calculate exponents: 27 × 2 -11 ÷ 4
Multiply and divide: 54 - 11 ÷ 4
Multiply and divide: 54 - 
Add and Subtract: 
Convert improper fractions to mixed numbers: = 
C) {-10-[12+(-3)²] + 3³}+3³}÷(-3)
Calculate within parentheses: -4 ÷ (-3)
Multiply and divide: 
Simplify and convert improper fraction to a mixed number:
= 
= 
Hope this helped! If so, please mark brainliest.
Answer:
Yes
Step-by-step explanation:
Answer:
251 b + 21 or b = (-21)/251
Step-by-step explanation:
Simplify the following:
6 b - 7 (-35 b - 3)
-7 (-35 b - 3) = 245 b + 21:
245 b + 21 + 6 b
Grouping like terms, 245 b + 6 b + 21 = (6 b + 245 b) + 21:
(6 b + 245 b) + 21
6 b + 245 b = 251 b:
Answer: 251 b + 21
__________________________________________
Or if you need the Roots.
Solve for b:
251 b + 21 = 0
Subtract 21 from both sides:
251 b + (21 - 21) = -21
21 - 21 = 0:
251 b = -21
Divide both sides by 251:
Answer: b = (-21)/251
