So, -(a-3b) becomes -1(a-3b). Then, this becomes 5a-1a+3b. There is +3b because there is a double negative. So, 5-1=4, so your answer is 4a+3b. Pls brainliest

3 0

2 years ago

25. Two planes leave the airport at the same time. Their speeds are 135mph and 162mph, and the angle between their two paths is

sdas [7]

Answer:

The two planes are 349 miles apart.

3 0

3 years ago

Ralph and Jody go to the store to buy chips and candy bars. Ralph buys 3 bags of potato chips and 4 candy bars for 375 cents. Jo

s2008m [1.1K]

3x+4y = 375
6x+ 4y= 600
-------------------
6x-3x = 600 - 375

3x=225
x=225:3
x=75 cents

3*x+4y= 375
3*75+4y=375
225 +4y = 375
4y=375-225
4y=150
y=150:4
y=37,5 cents

the price is 75+37,5=112,5 cents for one bag of potato chips and one candy bar

3 0

3 years ago