Answer:
4
Step-by-step explanation:
Explanation:
D
=
d
2
=
b
2
−
4
a
c
=
100
+
96
=
196
-->
d
=
±
14
There are 2 real roots:
x
=
−
b
2
a
±
d
2
a
=
10
6
±
14
6
=
5
3
±
7
3
The positive real root is :
12
3
=
4
Answer:
x = 114°
Step-by-step explanation:
x = 114
vertical angles are equal
Your just multiplying 7 and 10, so your answer is gonna be B.
Answer:
(6, - 3 )
Step-by-step explanation:
Given the 2 equations
2x + 5y = - 3 → (1)
2x + 2y = 6 → (2)
Subtracting (1) from (2) term by term will eliminate the x- term
(2x - 2x) + (2y - 5y) = 6 - (- 3), that is
- 3y = 9 ( divide both sides by - 3 )
y = - 3
Substitute y = - 3 in either of the 2 equations and solve for x
Substituting y = - 3 in (1)
2x + 5(- 3) = - 3
2x - 15 = - 3 ( add 15 to both sides )
2x = 12 ( divide both sides by 2 )
x = 6
Solution is (6, - 3 )
