Answer:
Step-by-step explanation:
Given the system of equations:
2x + 3y = 15
X + 3y = 0
What is x?
2x + 3y = 15
X + 3y = 0 subtract the bottom equation fron the top one
2x - x + 3y - 3y = 15 - 0 see how the 3y - 3y equates to zero
2x - x = 15
x = 15 Now for extra credit what is y?
X + 3y = 0
15 + 3y = 0
15 - 15 + 3y = 0 - 15
3y = -15
3y/3 = -15/3
y = -5
-15
-5
0
5
15
P < 12
1. add 16 over
2. divide all by 3
Answer:
5 tens and 8 ones gives 58
Step-by-step explanation:
We have to describe 58 as a sum of tens and ones
We know that first digit from the right is the ones place
Second digit is the tens place
Hence, 5 tens and 8 ones gives 58
Also, we can see that
10+10+10+10+10=50 (5 tens)
and 1+1+1+1+1+1+1+1=8 (8 ones)
on adding both we get 58
Hence, 5 tens and 8 ones gives 58
Answer:
a= -4
Step-by-step explanation:
2^-4 ×2^a =2^-8
2^-4+a = 2^-8
both 2 are cancelled by dividing
then,
-4+a = -8
a = -8+4
a= -4
hope this helps you
Answer:
Aman's age = 20, Arun's age = 28
Step-by-step explanation:
Let
= Aman's age
Let
= Arun's age
- - - -
(Sum of their age is 56 after 4 years in the future)


(Ages are in the ratio 5:7)

Now, we can use substitution to find for Arun's age:



∴ Arun is 
To find for Aman's age, we can use substitution:



∴ Aman is 20
Hope this helps :)