Answer:
75=100%
Step-by-step explanation:
15=20%
30=50%
75=100%
Answer:
x = 22.2
Step-by-step explanation:
Let's set up this problem using cosine law:
x^2 = a^2 + b^2 -2abcos110
where a = 12, b = 15
x^2 = (12)^2 + (15)^2 - 2(12)(15)cos110
= 144 + 225 - 360(-0.342)
= 492
x = 22.2
Definitions:
1. A real number can be represented on a number line.
2. A rational number can be represented as a fraction, with both the numerator and denominator as integers. The denominator cannot be zero.
3. An irrational number has decimals that go on indefinitely.
4. An integer is a real number that is countable.
5. A repeating decimal has a group of numbers that repeat indefinitely as decimals.
6. A complex number involves the use of the quantity i, defined as i² = -1.
Answers:
a. 7/8
Real, Rational.
b. √36
Real, Rational because its value is +6 or -6.
c. √24
Real, Irrational.
d. 0.75
Real, rational because 0.75 = 3/4.
e. 0
Real, rational
f. √(-100)
Complex, because √(-1) * √100 = +/- i√100
g.

Irrational, Repeating decimal because

h -18/6
Real, Integer, Rational because -18/6 = -3.
Let x = age of jack
Let y = age of Lacy
x=3y (Jack age is 3 times that of Lacy)
(x+y)-8 = 25
Substituting value of x:
(3y+y) -8 = 25
4y - 8 = 25
4y = 33
y = 33/4 = 8.25 or 8 years 3 months (age of Lacy)
x = 3(8.25) = 24.75 or 24 years 9 months (age of Jack)
Checking:
Substituting in equation ( x + y ) -8 = 25
24.75 + 8.25 - 8 = 25
25 = 25