7^2 = 7x • 3
49 - 21x
-21x + 49
Answer:
x = 11.5, y = -5.5.
As an ordered pair this is (11.5, -5.5).
Step-by-step explanation:
2x+4y=1 Multiply this by 3:
3x+5y=7 Multiply this by -2.
6x + 12y = 3
-6x - 10y = -14 Adding these 2 equations:
0 + 2y = -11.
y = -11/2
y = -5.5.
Now plug this into the first equation:
2x + 4(-5.5) = 1
2x = 1 + 22
x = 23/2
x = 11.5.
Answer:
Step-by-step explanation:
A driver spent 45minutes to cover a distance of 120km
Convert minutes to hour
- 45 min = 45 /60 hr = 3/4 hr
Use the distance equation
Find the speed
Substitute the distance and time value and find the value of speed
- s = 120 / (3/4) = 120 * 4/3 = 160 km /h
1 is 28
2 is 13, 84, 85
Figure both by the Pythagorean Theorem<span />
Answer:
Division property of equality
Step-by-step explanation:
They are dividing both sides.