Answer:
4-9 = 4+(-9)
-6-7 = -6+(-7)
-4-(-9) = -4 + 9
6-(-7) = 6+7
Step-by-step explanation:
Double negatives means a positive and one positive and one negative is a negative.
Please give brainliest. I am working hard to get it.
Let:
x = Chemistry textbooks sold
y = Physics textbooks sold
The textbook store sold a combined total of 260, so:
The number of chemistry books sold was three times the number of physics textbooks sold, so:
Let:
Replace (2) into (1):
Replace the value of y into (2):
Answer:ygggydtdgdgdfddgfs
Step-by-step explanation:
Answer:
PD is the answer
Step-by-step explanation:
(PA) (PC) = (PB) (PD)
Answer:
30 cm^2
Step-by-step explanation:
a = 13 cm
b = 12 cm
using Pythagorean theorem:
a^2 = b^2 + c^2
--> c^2 = a^2 - b^2 = 13^2 - 12^2 = 169 - 144 = 25
--> c = √25 = 5
The area of that right triangle is:
S = b.c / 2 = 12 . 5 / 2 = 30 (cm^2)
