It's 50 because the bottom right is 65 too so 65 + 65 is 130. 180 - 130 is 50
Answer:
18i\sqrt{x} 7\\
Step-by-step explanation:
the answer is 18i in front if the root square an 7 goes inside it
Answer:
z = 60
Step-by-step explanation:
100+20+z=180
120+z=180
z=60
20% off means it is selling for 80% of the original price ( 100% - 20% =80%)
Divide the sale price by 80% as a decimal:
380/0.80 = 475
The original price was $475
Justify:
Multiply the original price by 20% and subtract:
475 x 0.20 = 95
475-95 = $380 which is the sale price.
2x^2 + x + 3=0 has only complex roots.
The determinant is 1-4*2*3 = -23
-23 (or any determinant) is the part under the square root sign, If that determinant is negative, knowing you cannot take the square root of a negative number, we know the answers must be complex.
