Mark is trying to find the length of a building block. He knows that the sum of 2.5 times the length of the block, 5 times the length of the block, and 1.9 inches is equal to 12.4 inches. What is the length of the building block?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Type the correct answer in each box. spell all words correctly. a sequence of transformations maps ∆abc onto ∆a″b″c″. the type of transformation that maps ∆abc onto ∆a′b′c′ is a . when ∆a′b′c′ is reflected across the line x = -2 to form ∆a″b″c″, vertex of ∆a″b″c″ will have the same coordinates as b′.

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.