Answer:
4.
Step-by-step explanation:
[(21 + 6) − 3^2] ÷ 9 ⋅ 2.
First work out the parentheses:
= ( 27 - 3^2) / 9 . 2.
Now the exponential:
= (27 - 9) / 9 . 2
= 18/9 .2
= 2 . 2
= 4.
Answer:
B
Step-by-step explanation:
It just is
Answer:
x = 31
ROS = 62
Step-by-step explanation:
QOR + ROS = 90 degrees as indicated by the box
28+ 2x = 90
Subtract 28 from each side
2x = 90 -28
2x = 62
Divide by 2
2x/2 = 62/2
x = 31
ROS = 2x = 2*31 = 62
Let x = the number of hours since 5 a.m.
Let y = temperature, °F
Let the total temperature change be modeled by the expression
y = ax + b
At 5 a.m., x = 0 and y = -9.4°F. Therefore
b = -9.4
When x = 6 hours, y = 2.8°F. Therefore
6a + b = 2.8
6a - 9.4 = 2.8
6a = 12.2
a = 2.0333
The expression is
y = 2.0333x - 9.4
Answer:
y = 2.0333x - 9.4
where
x = hours since 5 a.m.
y = temperature, °F
