Answer:
-3
Step-by-step explanation:
Since x=1, we can simplify the equation to 9+7y=-12.
To find the value of 7y, we first have to find what is missing.
-12-9=-21, so 7y has to be equal to -21. -21/7 equals -3, so y=-3.
Answer:
the first one
Step-by-step explanation:
In the other 2 i can see the x repeats itself meaning it isn't a function.
The two angles are vertical angles, which means they are the same.
Set the two equations to equal and solve:
2x +2 = 3x -52
Subtract 2x from each side:
2 = x -52
Add 52 to each side:
x = 54
Answer:
$14.40
Step-by-step explanation:
She spent 12 dollars and has 1/5 left.
This means $12 is 4/5 of her original money.
$12=4/5 of the original money
$12+ $[12•(4/5)]=4/5+ (1/5)
$12+$[2.4]=5/5
$14.4=5/5 of the original money
She originally had $14.40
