Choose the system of equations that matches the following graph: picture of coordinate plane with line y equals negative 5 halves x minus 7 and line y equals 7x minus 7. they intersect at 0, negative 7 a. 5x + 2y = −14 7x + y = 7 b. 5x + 2y = −14 7x − y = 7 c 5x − 2y = −14 7x + y = 7 d. 5x − 2y = −14 7x − y = 7

Match each equation with the operation you can use to solve for the variable. 1 subtract 10 2 divide by 10 3add 18 4add 10 5 subtact 18 6multiply by 5. 7multiply by 10. a 5 = 10p b p + 10 = 18 c p + 18 = 5 d 5p = 10

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %