The interstection of 2 lines is a plane
Step-by-step explanation:
multiplying eq 1 by 4and eq 2 by 3 ,we get
-12x+4y=28
-12x+12y=-36
solving eq 1and 2
4y-12y=64
-8y=64
y=-8
x=-5
Answer:
<u>Step-by-step explanation:</u>
EQ1: x + y = 12 --> x = 12 - y
EQ2: xy = 15
Substitute x = 12-y into EQ2 to solve for y:
(12 - y)y = 15
12y - y² = 15
0 = y² - 12y + 15
↓ ↓ ↓
a=1 b= -12 c=15
Now, let's solve for x:
Lastly, find x² + y² :
Answer:
<em> miles,</em>
Step-by-step explanation:
<em>To find out how many miles each person rode, divide the total number by how many people there were. </em>
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<em>Each person rode </em> <em>miles.</em>
Answer:
2
Step-by-step explanation:
Density equals the mass of the substance divided by its volume; D = m/v. Objects with the same volume but different mass have different densities.
so 10/5=2 so the density =2