Answer:3. B 4. B
Step-by-step explanation:3. Supplementary equals 180, 113 + 67 = 180
Answer:
3. C
4. D
Step-by-step explanation:
3.

Once 

4.
A quadratic equation has no real roots when the discriminant (
) is negative.
.
Let's try all the equations:
(A)

(B)


(C)

(D)

Answer
6/5 and 17/8
Step-by-step explanation:
1 1/5 = 6/5
1= 5/5 + 1/5 = 6/5
2 1/8 = 17/8
2 = 16/8 + 1/8 = 17/8
a^2 +b^2 = (2.5sqrt(2))^2
2a^2 = 6.25 *2
a^2 = 6.25
a = sqrt(6.25)
a = 2.5
length of each side = 2.5 units