The score range that sally would have to make a 90 average is 85-100
Answer: D
Tracing
Step-by-step explanation:
Sir Arthur Conan Doyle, author of the Sherlock Holmes stories, was credited as an influence to forensic science due to his character's use of methods such as fingerprints, serology, ciphers, trace evidence, and footprints long before they were commonly used by actual British and American police forces.
Step-by-step explanation:
log2x = 1 - log(x+4)
log2x = log10 - log(x+4)
log2x = log[10/(x+4)]
2x = 10/(x+4)
2x(x+4) = 10
2x² + 8x - 10 = 0
÷2 both sides of equation
x² + 4x - 5 = 0
(x+5)(x-1) = 0
x = -5, 1
x isn't be -5 because logA, A need to be > 0
So, x value is 1
The numbers can be 5.25 and 26.25
