Answer:
The first step is to replace the value of x from the first equation with x in the second equation:
x=y-7
3x+15y=-1
3(y-7)+15y=-1
3y-21+15y=-1
18y=-1+21
18y=20
y= =
x=
x=
Answer:
The interior of Earth is very hot (the temperature of the core reaches more than 5,000 degrees Celsius) for two main reasons: The heat from when the planet formed, The heat from the decay of radioactive elements.
Step-by-step explanation:
yes it does get hot
5: 90 can also be written as a fraction 5/90 then reduce the fraction
5/90 (5*1=5/5*18=90) so it reduces to 1/18
the ratio simplified is 1:18
Answer:
2 inches in the drawing
Step-by-step explanation:
Because if 5 feet equals 1 inch and 5 times 2 equals 10 feet (so now we do the same to the other side) 1 times 2 and that equals to 2 inches.