Answer:
x = ± sqrt(-49)
or x = ± 7i
Step-by-step explanation:
x^2 +49 = 0
Subtract 49 from each side
x^2 +49 -49 = 0-49
x^2 = -49
Take the square root of each side
sqrt(x^2) = ± sqrt(-49)
x = ± sqrt(-49)
We have to complex numbers to solve
x = ± sqrt(-1) sqrt(49)
sqrt(-1) = i
x = ±i *7
x = ± 7i
Answer: 2 11/12 kg
Step-by-step explanation:
add the fractions and the the two(2)
Answer:
Four hours.
Step-by-step explanation:
She travels 2.5 miles an hour; so for her to travel ten miles, she must have hiked for four hours.
Answer:
2. 45
Step-by-step explanation:
i got this right today lol
<span>x + 3y = 5
2x - 3y = 1
------------------add
3x = 6
x = 2
</span>x + 3y = 5
2 + 3y = 5
3y = 3
y = 1
answer x = 2 y = 1
