The fraction of the plants that have flowers in the set given is calculated by dividing the number of plants with flowers by the total number of plants.
f = plants with flowers / total number of plants
From the given,
f = 4 / 5
f = 0.8
Thus, the answer to this item is the first choice.
I am not so sure because i have not studied this yet i am very sorry
Answer:
x = 52
Step-by-step explanation:
The triangle is isosceles. The markings tell us that.
The 76 is not opposite either one of the equal sides. Let the angle values opposite the equal sides be x
x + x + 76 = 180 All triangles = 180
2x + 76 = 180 Subtract 76 from both sides.
2x = 180 - 76
2x = 104 Divide both sides by 2
x = 104/2
x = 52
So x = 52
Answer:
d. none of the above
Step-by-step explanation:
The sum of deviations from the mean is zero.
__
The sum of absolute deviations, divided by the sample size, is the mean absolute deviation.
The sum of the squared deviations from the mean, divided by the sample size, is the variance.
Answer:
6.55 cm
Step-by-step explanation:
A triangle is a polygon with three sides and three angles. Types of triangles are isosceles, acute, scalene, obtuse, right and equilateral triangle.
Cosine rule is used to show the relationship between sides and angles of a triangle. If a, b, and c are sides of a triangle, while A, B, and C are angles opposite to the corresponding sides. Then:
c² = a² + b² - 2ab*cos(C)
Given that PR = 13 cm, PQ = 12 cm and angle QPR = 30°, hence:
QR² = PR² + PQ² - 2(PR)(PQ)cos(∠QPR)
QR² = 13² + 12² - 2(13)(12)cos(30) = 169 + 144 - 270
QR² = 43
QR = 6.55 cm