Use the property of substitution to solve:
2 ( x - 2y = 15) ... 2x - 4y = 30
2x + 4y = -18
subtract..... 4x = 12
divide by 4 x =3 place into original equation 3 - 2y = 15
-2y = 12
y = -6
(3, -6)
"Out of" represents, mathematically, the fraction line. So 40 out of 50 can be represented by 40/50. The percentage can be represented by a fraction over 100. So to transform 40/50 to a fraction /100, we multiply 50 by 2, and of course we should multiply 40 by 2 too.
So 40/50 = 40 * 2/50 * 2 = 80/100 = 80%
So, 40 out of 50 is 80% as a percentage.
Hope this Helps! :)
Answer:
Check pdf
Step-by-step explanation:
Answer:The answer is (4,7)
Step-by-step explanation:
Answer:
91
Step-by-step explanation:
shaded area= area of rec - area of semi circle
A= 12*14- 1/2*22/7*7²= 91 cm²
note π=22/7 not 2/7
