Answer:
For number 5 is n=10
Step-by-step explanation:
Answer:
13.416 or 13.4
Step-by-step explanation:
Step 1) Solve the second equation for
x
:
x
+
3
y
=
−
5
x
+
3
y
−
3
y
=
−
5
−
3
y
x
+
0
=
−
5
−
3
y
x
=
−
5
−
3
y
Step 2) Substitute
−
5
−
3
y
for
x
in the first equation and solve for
y
:
3
(
−
5
−
3
y
)
−
2
y
=
7
−
15
−
9
y
−
2
y
=
7
−
15
−
11
y
=
7
15
−
15
−
11
y
=
15
+
7
0
−
11
y
=
22
−
11
y
=
22
−
11
y
−
11
=
22
−
11
−
11
y
−
11
=
−
2
y
=
−
2
Step 3) Substitute
−
2
for
y
in the solution to the second equation at the end of Step 1 and calculate x:
x=−5−(3×−2)
x=−5−(−6)
x=−5+6
x=1
The solution is x=1 and y=−2
Answer:
28
Step-by-step explanation:
4(5*2)-16+4
4(10)-16+4
40-16+4
24+4
28
Set up the equation:
Let x be the number of weeks before they weigh the same.
148+2x=193-x
solve:
148+2x=193-x
3x=45
x=15
therefore: it will take 15 weeks until they weigh the same.
