Answer:
A. Subtract x from both sides: (i.e. 5+x-12 = x-7 <--> 5-12 = -7)
This equation is identically true, so it holds no matter what x is.
B. This one is pretty self-explanatory
Step-by-step explanation:
u wrote the question wrongly the answer is in answer box
This question also my teacher gives me
hope it helps
Answer:
The height of the stone at the time it is thrown is 15.
Step-by-step explanation:
You have a quadratic function of the form h (x) = ax² + bx + c. In this case it is h (x) = -5x²+10x+15, where a =-5, b =10, c =15, x is the time and h (x) is the height of the stone after being thrown.
The moment the stone is thrown is instant zero. So if x = 0, h (0) is calculated:
h(0)= -5*0² +10*0 +15
h(0)= 0 + 0 + 15
h(0)= 15
The height of the stone at the time it is thrown is 15.
The answer is A.) Both will double at the same rate. Now I am going to explain how I know. If the interest rate of each is 1% this means that 1% of each will be added to the accounts per month. $1900 x 1% is $19 per month. $700 x 1% is $7 per month. Now I will divide 1900 by 19 to find how many months it will take to double the money in that account. It will take 100 months for the account with $1900 in it to double. Now I will multiply $700 by $7 to get 100 months also. This means that each account will take 100 months to double so your answer is A.) Both will double at the same rate.
The answer would be negative -1.9 or if needed as a fraction, the answer would be -1 9/10