x+y=4
-x+y=2
We solved this equations system by reduction method:
x+y=4
-x+y=2
-----------------
2y=6 ⇒y=6/2=3
x+y=4
-(-x+y=2)
---------------
2x=2 ⇒x=2/2=1
answer: x=1; y=3
substitution method
x+y=4
-x+y=2
x=4-y
-(4-y)+y=2
-4+2y=2
2y=2+4
2y=6
y=6/2=3; then x=4-y=4-3=1
answer: x=1; y =3
equalization method
x+y=4 ⇒y=4-x
-x+y=2 ⇒y=2+x
Therefore:
4-x=2+x
-x-x=2-4
-2x=-2
x=-2/-2=1; then; y=4-x=4-1=3
Answer: x=1; y=3.
In 100 she can make 10 and in 70 she can make 7 so just add 10 and 7 to get the answer of 17
Answer:
Step-by-step explanation:
Let the total number of Newspapers be x
Number of newspapers delivered in first hour of his route= of x
Total number of newspapers delivered in first hour= x
Number of newspapers left= x-
Number of newspapers left=
Number of newspapers left=
Number of newspapers delivered in second hour=4/5 of
Number of newspapers delivered in second hour=
Fraction of newspapers delivered in second hour is=
Hence, the correct answer is
See the attached picture:
Answer:
The differences between the absolute highest and the absolute lowest temperatures is 78°.
Step-by-step explanation:
It is provided that:
- The highest temperature ever recorded in Chicago was 105°
Compute the differences between the absolute highest and the absolute lowest temperatures as follows:
Thus, the differences between the absolute highest and the absolute lowest temperatures is 78°.