Answer:
It would be 10 months for the price of $320.
Step-by-step explanation:
First we need to find how much Anna's swimming charge and Bobie's charge is.
PA=70+t The price of the month equals to the starting fee and monthly charge
120=70+2t The price of 2 months times the monthly charge
50=2t
25=t is Anna's monthly charge
PB=250+t is Bobies starting price and monthly charge
264=250+2t is the month charge for Bobie after 2 months
14=2t
7=t is Bobie's monthly charge
70+25x=250+7x We need to find x which is what month will satisfy both equations
25x=180+7x Subtract 70 from both sides
18x=180 Subtract 7x from both sides
x=10 divide 18 from both sides
Now we have the months that satisfy both equations we need to find the total price that matches with it. So we plug it back into both equations.
PA=70+25x PB=250+7x
PA=70+25(10) PB=250+7(10)
PA=70+250 PB=250+70
PA=320 PB=320
Answer:
(-3,4)
Step-by-step explanation:
That means to reflect the point across the y-axis... If you draw (3,4) on the coordinate plane you should see (-3,4) is the reflection across the y-axis from that point.
Answer:
Faisal receives $241
Ahmed receives $482
Walid receives $723
Step-by-step explanation:
I am going to build a system of equations to solve this question.
We have that:
x is the amount that Faysal received.
y is the amount that Ahmed received.
z is the amount that Walid received.
Ahmed, Walid and Faisal made $1446 profit from selling used books.
This means that
Ahmed to receive double amount of Faisal
This means that
Walid to receive triple amount of Faisal.
This means that
So
Faisal receives $241
Ahmed receives $482
Walid receives $723
Say you have 7 divided by 3.5
7/3.5 If you set up like this 3.5 into 7, you move the decimal over once in 3.5
So you now have 35 into 7. Next you have to move the decimal on the seven however many times you moved the first decimal. So 7 is now 70
Next you just do simple division 35 into 70 =2
Answer:
(a)
The quantity of element that are still contained in the stolen rock
is 37.1627g
(b)
this rock can be used by the superhero's nemesis to render the superhero powerless is 567 years
Step-by-step explanation:
We are given
original quantity =250g
half life time =200 years
so, we can use formula
where
Po is initial quantity
h is half life time
t is time in years
so, we can plug h=200 and Po=250
and we get
(a)
we can plug t=550
and then we can find P(t)
we get
(b)
we can set P(t)=35
and then we can solve for t
we can take ln on both sides
years