Answer:
Number 1 and Number 4
Step-by-step explanation:
By factoring, you can figure out the roots (x = -2 or x = 2)...
1. x^2 - 4 = 0
--> (x + 2)(x - 2) = 0
--> x = -2, x = 2
2. x^2 + 4 = 0
--> factors weirdly, so I won't write it. You'd have to use the quadratic formula.
3. 3x^2 + 12 = 0
--> 3 (x^2 + 4) = 0
--> factors weirdly (same as above)
4. 4x^2 - 16 = 0
--> 4 (x^2 - 4) = 0
--> 4 (x+2) (x-2) = 0
--> x = -2, x = 2
5. 2 (x-2) 2 = 0
--> x = 2
Answer:
175
Step-by-step explanation:
Si haces 35% por 500, es igual a 175.
Answer: is c (70 degrees) I hope it helps anyone.
Step-by-step explanation:
RS is a tangent ⇒ ∠OSR = 90°
RT is a tangent ⇒ ∠OTR = 90°
OSRT is a quadrilateral, so has an angle sum of 360°
⇒ ∠OSR + ∠SRT + ∠OTR + ∠SOT = 360°
⇒ 90° + 40° + 90° + ∠SOT = 360°
⇒ 220° + ∠SOT = 360°
⇒ ∠SOT = 140°
Now use the Angle at the Center Theorem
∠SUT = ½ × ∠SOT = ½ × 140° = 70°
Answer:
g = -16
Step-by-step explanation:
-12/3 = -4
-4 x 4 = -16
Answer:
Step-by-step explanation:
2/3a + 2/5a - 3/4b - 7/4b + 12- 5
4/8a - 10/8b + 7