Step-by-step explanation:
2x+3y=13..........(I)
2x-3y=5.….........(II)
Subtract equation II from equation I
0+6y=8
6y=8
y=8/6=4/3
Substitute 4/3 for y in 2x-3y=5
2x-3×(4/3)=5
2x-4=5
Collect like terms
2x=4+5
2x=9
x=9/2
Therefore,y=4/3,x=9/2
Answer:
5/8
Step-by-step explanation:
3/8 are dogs so the remaining amount is 5 so it would be 5/8
Answer:
7^22
Step-by-step explanation
Given the expression
7^8 × 7^3 × 7^4 × 7^7
In indices
a^m × a^n = a^{m+n}
The powers are added since the base are the same
We ate going to add all the powers of the expression given since they have the same base which is 7
7^8 × 7^3 × 7^4 × 7^7
= 7^{8+3+4+7}
= 7^22
= 3.91×10^18
Answer: it’s 12
Step-by-step explanation: