X+y = 15
x-y = 25
------------
2x = 40
x = 40/2
x = 20
y = 15-x
y = 15-20
y = -5
2x² - y² =
2*20² - (-5)² =
2*400 - 25 =
800 - 25 =
775
Sal: 25 +5x = 240
Divide 5 from both sides so it would be 5+ x=240/5
Subtract 5 from both sides x=48-5
X= 43
Elena: 15 + 5x=300
Divide 5 from both sides so it would be 3 +x=300/5
Subtract 15 from both sides x=60-3
X=57
So Sal jogged for 43 minutes. While Elena jogged for 57 minutes
Answer:
We conclude that:
Step-by-step explanation:
Given the expression
Least Common Multiple of x+4, x+6: (x+4) (x+6)
Adjusting fractions based on the LCM
since the denominators are equal, combine the fractions:
so the expression becomes
simplify
Therefore, we conclude that:
0 is the answer because if it is divisible, that means that a would have to be able to go into b evenly
Answer:
Diana approximately had 128 cards
Step-by-step explanation:
Let n be the number of cards Diana had. She knows that
- there are 17 kings among n cards
- 4 kings among 30 cards
Write a proportion:
Cross multiply: