Answer:
x = -9
x = 2
Step-by-step explanation:
We can say that:
x (x + 7) = 6*3
x² + 7x = 18
x² + 7x - 18 = 0
Now solving by quadratic formula we get;
x = 2, and -9
if we substitute in -9 for x, let's see what happens:
(-9) (-9 + 7) = 6*3
(-9) (-2) = 6*3
18 = 18
therefore x = -9 works! Let's see what happens if we substitute x in for 2;
(2) (2 + 7) = 6*3
(2) (9) = 6*3
18 = 18
Therefore x = 2 works as well!
<u>The final answer would be;</u>
<u>x = -9</u>
<u>x = 2</u>
Hope this helps!
Ketch the graph 7x-3y=21
Using the intercept method:
Let x=0 and solve for y
7(0)-3y=21
-3y=21
-3y/-3=21/-3
y=-7
<span>Plot (0,-7)</span>
1 person can finish 1st, 1 person can finish 2nd, one can finish 3rd, out of one of the other three one has to be last. Mark as Brainliest please
<h3>Just put the value of x and calculate it.</h3>
Answer: a=−3
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
a−2+3=−2
a+−2+3=−2
(a)+(−2+3)=−2(Combine Like Terms)
a+1=−2
a+1=−2
Step 2: Subtract 1 from both sides.
a+1−1=−2−1
a=−3