menu
Qammunity
Login
Register
My account
Edit my Profile
Private messages
My favorites
Ask a Question
Questions
Unanswered
Tags
Categories
Ask a Question
Y =x2−3x−4 x=y+8 solution set a: {(-1,0), (4,0)} b: {(8,0), (0,8)} c: {(0,0)} d: {(2,-6)} e: there is no real solution
asked
Apr 20, 2018
222k
views
3
votes
Y =x2−3x−4 x=y+8
solution set
a: {(-1,0), (4,0)}
b: {(8,0), (0,8)}
c: {(0,0)}
d: {(2,-6)}
e: there is no real solution
Mathematics
high-school
Maybe Julius
asked
by
Maybe Julius
8.8k
points
answer
comment
share this
share
0 Comments
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
4
votes
Plug in x into first equation
Y=(y+8)^2-3 (y+8)-4
Y=y2+16y+64-3y-24-4
Y=y2+13y+36
Y=(y+9) (y+4)
Y =-9,-4 plug in -9 to find x n plug in -4 to find its x
X=y+8
X=-9+8 x=-1 Plug in -1 into first equation
Y=x2-3x-4
Y=-1^2+3-4
Y =1+3-4
Y=0
(-1,0) do the same for -4
X=y+8
X=-4+8
X=4
Y=x2-3x-4
Y=4^2-12-4
Y=16-16
Y=0
(4,0)
Solutions are (-1,0)(4,0)
Misterhex
answered
Apr 26, 2018
by
Misterhex
7.8k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
Related questions
asked
Jan 9, 2017
89.5k
views
The domain of the function g(x) = √(x2−3x−4) is? Use the fishball method
Mad Eddie
asked
Jan 9, 2017
by
Mad Eddie
8.6k
points
Mathematics
high-school
1
answer
5
votes
89.5k
views
asked
Jun 7, 2018
157k
views
Let f(x)=x2−3x−4 . What is the average rate of change from x = 7 to x = 10? Question 6 options: 24 14 66 42
Dkar
asked
Jun 7, 2018
by
Dkar
7.1k
points
Mathematics
high-school
1
answer
3
votes
157k
views
asked
Oct 24, 2018
95.5k
views
Let f(x)=x2−3x−4 . What is the average rate of change from x = 7 to x = 10? Enter your answer in the box.
Suman Barick
asked
Oct 24, 2018
by
Suman Barick
7.4k
points
Mathematics
high-school
2
answers
3
votes
95.5k
views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.
9.4m
questions
12.2m
answers
Other Questions
How do you can you solve this problem 37 + y = 87; y =
What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement how thick must the cement be to cover field
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy
Search Qammunity