The ratio is 10 to 18, therefore 10 * nr of students = 18 * nr of girls.
So the number of girls = nr of students * 10 / 18 which is indeed 150.
Answer:
Step-by-step explanation:
Factorise the numerator and denominator
8a² - 2 ← factor out 2 from each term
= 2(4a² - 1) ← 4a² - 1 is a difference of squares
= 2(2a - 1)(2a + 1)
4a² + 4a + 1 ← is a perfect square
= (2a + 1)²
Thus
= ← cancel (2a + 1) on numerator/ denominator
=
=
Answer:
2 19/21 = 2.9048
Step-by-step explanation:
6 3/7 - 3 11/21 = 61/21
= 2 19/21
= 2.9047619
Answer:
B
Step-by-step explanation:
It would be -100 because you would be withdrawing, not adding the amount, or staying with the same amount.