For the 1st problem, solve the 2nd equation for x.
x = -1 - y
Now, replace x in the 1st equation with (-1 - y)
2(-1 - y) - 3y = 2
-2 - 2y - 3y = 2
-2 - 5y = 2
-5y = 4
y = -4/5
x = -1 - (-4/5) = -1 + (4/5) = -1/5
The solution is (-1/5, -4/5)
For the 2nd problem, multiply the top equation by 15 and the bottom equation by -12. That gives us:
10x - 12y = 15
-36x +12y = 84
Add the two together, which gives us:
-26x = 99
x = -99/26
Now, put this value of x into either equation to solve for y
3(-99/26) - y = -7
-297/26 - y = -7
-y = -7 + 297/26
-y = 115/26
y = -115/26
The solution to this system is (-99/26, -115/26)
72% as a fraction is 18/25.
Change 72% into a decimal, which is 0.75.
Then change the decimal into a fraction, 72/100.
Last step is to simplify 72/100 in its lowest form which gets us 18/25.
Answer:
0.009 also as 0 and 9 thousandths
Step-by-step explanation:
That is C and B. The missing lengths
75 miles per hour means,
75 miles per 60 minutes.
And this makes 1.25 miles per 1 minute.
1 mile is 1760 yards.
So 1.25 miles is ;
1.25 * 1760 = 2200 yards.
Answer is 2200 yards per minute.
