–2
0
2
11
Answer:
x = 2 , - 11.
Step-by-step explanation:
Given : x² + 9x – 22 = 0
To find : What values of x make the equation.
Solution : we have given x² + 9x – 22 = 0
On factoring
x² + 11x - 2x – 22 = 0 .
Taking common x from first two term and -2 from last two terms.
x ( x +11) - 2 (x +11) = 0.
On grouping
(x -2) (x +11) = 0
For
x - 2 =0
x = 2 .
For
x + 11 = 0
x = -11.
Therefore, x = 2 , - 11.
Answer:
Jerome spent hours studying mathematics
Step-by-step explanation:
We were given that every 5 hours Jerome spends studying math. he studies science for 4 hours.
The ratio of Mathematics to Science is
respectively.
The total ratio is .
If Jerome spent a total of hours studying last week, then the number of hours he spent studying mathematics is
.
.
hours.
Answer:
And then we can solve for x like this:
And the final solution would be 30 hours for math and 24 for the science course.
Step-by-step explanation:
We need to define some notation first. Let
x= number of hours that he spent for the math course
y = number of hours that he spent for th science course
We have that the total of hours is 54, and we can write that like this:
(1)
And the other conditions is: " For every 5 hours Jerome spends studying math, he studies science for 4 hours" And we can write this like that:
And we can solve for x like this:
And we can replace this into equation (1) and we got:
And if we do the algebra we got:
And then we can solve for x like this:
And the final solution would be 30 hours for math and 24 for the science course.
-r^2+6r-9
Answer:
100 in
50 de
Step-by-step explanation: