Answer:
He can clean 10 pools in 25 hours.
Step-by-step explanation:
Y = 2x - 4....so sub in 2x - 4 for x in the other equation
y = x^2 - 6x + 12
2x - 4 = x^2 - 6x + 12
x^2 - 6x - 2x + 12 + 4 = 0
x^2 - 8x + 16 = 0
(x - 4)(x - 4) = 0
x - 4 = 0
x = 4
x - 4 = 0
x = 4
solution is (4,4)
Answer:
a. 1
b. 7
c. -4
Step-by-step explanation:
a. 5 + (-4)
= 5 - 4
= 1
b. -9 + 16
= 7
c. 10 + (-14)
= 10 - 14
= - 4
If you further explanation how it come then please tell.
The correct answer is C. 49.
Remember that there are 100 students divided into 7-12 and 13-18 age group. So there should be 50 for each. The table should go like this:
7-12 age group
23 adventure or biography
27 - detective
so you just have to subtract 50 from 23, which makes it 27. The remaining belongs to the 13-18 age group.
13-18 age group
1 - detective
49 - adventure or biography.
