Answer:
150°
Step-by-step explanation:
It is given that CosФ < 0 i.e CosФ is negative.
Therefore, the minimum the value of Ф for which CosФ <0 will be in the second quadrant i.e 90° < Ф < 180°.
Now it is also given that, Sin Ф =0.5 {the value of SinФ is positive because Sin value is positive in second quadrant.}
⇒ Ф =180° - Sin⁻¹ (0.5) = 180°-30° =150° (Answer)
Answer:
the answer is 11.7
Step-by-step explanation:
Her niece sees 15 goats.
Step-by-step explanation:
Given,
Total animals on barn = 40
Total legs counted by May's niece = 110
A goat has 4 legs and chicken has 2 legs.
Let,
x represent the number of goats
y represent the number of chicken
x+y=40 Eqn 1
4x+2y=110 Eqn 2
Multiplying Eqn 1 by 4
Subtracting Eqn 2 from Eqn 3
Dividing both sides by 2
Putting y = 25 in Eqn 1
Her niece sees 15 goats.
Keywords: linear equation, elimination method
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Answer:
D Reliable
Test reliability defines how consitent a measure is of a particular element o over iterations of the test
Answer: 4x° = 80°, 60°, 2x° = 40°
Steps:
4x + 60 + 2x = 180
6x + 60 = 180
6x = 120
x = 20
4x
4(20) = 80
2x
2(20) = 40
Check:
80 + 40 + 60 = 180
180 = 180 ✅