Determine whether the expressions are equivalent. 8x+4y is ___ to 4(2x+1)

Equivalent. 8x+4y=8(x+4y)

Equivalent. 8x+4y=4(2x+1)

Not equivalent. 8x+4y=6x(4y+2x)

Not equivalent. 8x+4y=4(2x+y)

Landon wrote that 3−2.6=4. which statement about his answer is true?

You buy 4 items that cost 2.69 14.45 8.05 13.95 what is the estimated total round to the nearest dollar

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?