Rhonda drove 51 miles per hour for 5 hours. She then drove 55 miles per hour for x hours. Which expression is equivalent to the total distance Rhonda drove? [
51
(
5
)
−
55
x
]
[ 51 ( 5 ) − 55 x ]

[
51
(
5
)
+
55
x
]
[ 51 ( 5 ) + 55 x ]

[
(
51
+
5
)
(
55
+
x
)
]
[ ( 51 + 5 ) ( 55 + x ) ]

[
(
51
+
55
2
)
(
5
+
x
)
]

Sherina wrote and solved the equation. x-56=230 x-56-56=230-56 x=174 what was sherina’s error? sherina’s work is correct. sherina only needed to subtract 56 from 230. sherina made a subtraction error when subtracting 56 from 230. sherina should have added 56 to both sides of the equation.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Brittany has designed four different birdcages, each with the same volume: a square pyramid, a cylinder, a cone, and a sphere. the zoo wants to use one of brittany’s designs but plans to change the volume of the cage. find the design change that would result in the birdcage with the greatest volume. a.) increase the area of the base of the square pyramid by a factor of ten. b.) increase the height of the cylinder by a factor of ten. c.) increase the radius of the cone by a factor of ten. d.) increase the radius of a sphere by a factor of ten.