Answer:
x = -2
, y = 3
Step-by-step explanation:
Solve the following system:
{4 x + 5 y = 7
y = 3 x + 9
Hint: | Perform a substitution.
Substitute y = 3 x + 9 into the first equation:
{4 x + 5 (3 x + 9) = 7
y = 3 x + 9
Hint: | Expand the left hand side of the equation 4 x + 5 (3 x + 9) = 7.
4 x + 5 (3 x + 9) = (15 x + 45) + 4 x = 19 x + 45:
{19 x + 45 = 7
y = 3 x + 9
Hint: | Choose an equation and a variable to solve for.
In the first equation, look to solve for x:
{19 x + 45 = 7
y = 3 x + 9
Hint: | Isolate terms with x to the left hand side.
Subtract 45 from both sides:
{19 x = -38
y = 3 x + 9
Hint: | Solve for x.
Divide both sides by 19:
{x = -2
y = 3 x + 9
Hint: | Perform a back substitution.
Substitute x = -2 into the second equation:
Answer: {x = -2
, y = 3
Answer:
x > 3
Step-by-step explanation:
8x - 6> 12+2x
+6 +6
8x > 18 + 2x
-2x -2x
6x > 18
/6 /6
x > 3
N || P.
Since N is parallel to O, and O is parallel to P, then N must be parallel to P.
Answer:
Step-by-step explanation:
<u>Given equation</u>
2^x = -2x + 4
To solve graphically, following steps required
1.<u> Graph the function</u>
2. <u>Graph the function</u>
3. <u>Identify any intersection of the lines</u>
4. <u>Take the x-coordinates of the intersection points and record as solution</u>
<em>See attached, the answer and the solution of the given equation</em>
<u>The solution is </u>
Answer:
B
Step-by-step explanation:
