jellysoup98
jellysoup98
05-10-2014
Mathematics
Answered
please help me with this question
Answer :
flavour5
flavour5
05-10-2014
1. y^2 - (y^2 + 10y+ 25) = 20
2. -10y -25 = 20
3. -10y = 45
4. y = -4.5
Answer Link
tmacar
tmacar
05-10-2014
y^2 - (y+5)^2 = 20
starting with (y+5)^2 that's y^2 + 5y + 5y + 25
then you change the signs and get
y^2 - y^2 - 10y - 25 = 20
so -10y = 45 >> 10y = -45 >> y = -4,5
answer: A
Answer Link
VIEW ALL ANSWERS ( 84+ )
Other Questions
the amount of snow on the ground increased by 8 in between 7 PM and 10 PM by 10 PM there was less than 2ft of snow how much snow was there by 7 PM
A number decreased by 4 is less than 14
how do you write 4540 million in standard form
the running back for the Bulldogs football team carried the ball 9 times for a total loss of 15 34 yards Find the average change in field position on each run
If I threw a ball vertically at an initial speed of 34msec how many seconds would it take to reach its maximum height
Which of the following is a complex sentence Points 2 If you read carefully you should be able to find the theme Reading carefully you should be able to find th
The scientific notation of 2500
Saturn has a radius of 60330000 meters and a mass of 57 1026 kilograms Calculate the strength of its gravitational field
What are the pH changes in the stomach before and after taking an antacid tablet
why do you need blood amp what organ pushes blood through your body
