Answer:
yes
Step-by-step explanation:
By definition, all sides are the same length, so the perimeter is simply the length of a side times the number of sides.
11, 12, 13, 14, 15, 16, 17, 18, 19 Sorry if it doesn't help, I'm being too obvious
Answer:16/20
Step-by-step explanation:
if you divide the two numbers by 4 you have:
16/4=4
20/4=5
(if you divide or multiply both of the numbers with the same number, the ratio will remain the same)
So the two numbers are same
Answer:
About 39,402.
Step-by-step explanation:
You need to find the 46% of black cars.
Answer:
(-4,15)
Step-by-step explanation:
Personally I think this works better with substitution, but I'll do it your way.
3x + y = 3
<u>2x + y = 7 </u> Subtract these two equations
x = - 4 3 - 7 = - 4
3x + y = 3 Substitute - 4 for x
3(-4) + y = 3 Combine
-12 + y = 3 Add 12 to both sides
-12 + 12 + y = 3+12
y = 15
<u>Check</u>
2x + y = 7
2*-4 + 15 = 7
- 8 + 15 = 7
7 = 7
It checks.