Answer:
he answered 74.5% of questions correctly
This is called the Pythagorean theorem : a ² + b ² = c ². You can substitute any of the variable with any of the known numbers and then you all you have to do is isolate the variable. I hope that helps!!
Answer:
D Multiply equation B by 5 and equation A by 4 and add the results together
Answer: B ( 2,9) .
Step-by-step explanation:
X+y=9
y=8x
x+8x= 9
9x = 9
x = 9/9
x = 1
y = 8(1)
y =8
