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dybincka [34]
4 years ago
15

Rain is falling steadily in Phoenix, Arizona. After 2 hours, 4 inches of rain has fallen. Use the table below to help you write

an equation that gives the amount of rain that has fallen after x hours if the rain falls at a constant rate. How many inches of rain will fall in 24 hours if the rain continues at this rate?
Mathematics
1 answer:
IrinaVladis [17]4 years ago
7 0

Answer:48

Step-by-step explanation:2hours is 4 imches so 24÷2=12 4×12=48 so your answer is 48

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1. Given points ????(3, −5) and ????(19, −1), find the coordinates of point ???? that sit 3/8 of the way along AB ,close to A th
Nastasia [14]

Answer:  The required co-ordinates of point C are (9, -3.5).

Step-by-step explanation:   We are given the points A(3, -5) and B(19, -1).

We are to find the co-ordinates of point C that sit 3/8 of the way along AB, where the point P is close to A than to B.

According to the given information, we have

\dfrac{AC}{AB}=\dfrac{3}{8}\\\\\Rightarrow \dfrac{AC}{AC+BC}=\dfrac{3}{8}\\\\\Rightarrow 8AC=3AC+3BC\\\\\Rightarrow 5AC=3BC\\\\\Rightarrow AC:BC=3:5.

So, point C divides the line segment AB in the ratio 3 : 5.

We know that

if a point Q divides a line segment joining the points S(a,b) and T(c,d), in the ratio m : n, then the co-ordinates of Q are

\left(\dfrac{mc+na}{m+n},\dfrac{md+nb}{m+n}\right).

Therefore, the co-ordinates of point C are

\left(\dfrac{3\times19+5\times3}{3+5},\dfrac{3\times(-1)+5\times(-5)}{3+5}\right)\\\\\\=\left(\dfrac{57+15}{8},\dfrac{-3-25}{8}\right)\\\\=(9,-3.5).

Thus, the required co-ordinates of point C are (9, -3.5).

3 0
4 years ago
f of x equals the quantity x minus one times the quantity x plus two times the quantity x plus four all divided by the quantity
Alik [6]
f(x)=\frac{(x-1)(x+2)(x+4)}{(x+1)(x-2)(x-4)}

The denominator of a fraction can't be equal to 0.
(x+1)(x-2)(x-4) \not= 0 \\
x+1 \not=0 \ \land \ x-2 \not= 0 \ \land \ x-4 \not= 0 \\
x \not= -1 \ \land \ x \not = 2 \ \land \ x \not= 4

The function is undefined at x=-1, x=2, x=4, because for these values the denominator of the function would equal 0, and it's impossible to divide by 0.

Edward is correct.
7 0
4 years ago
Identify the graph of 4x^2+5y^2=20 for T(5,-6) and write an equation of the translated or rotated graph in general form. (pictur
NikAS [45]

Answer:

b. ellipse; 4x^2+5y^2-40x+60y+260=0

Step-by-step explanation:

The graph of 4x^2+5y^2=20 an ellipse because the coefficients of the quadratic terms are not the same.

This ellipse is centered at the origin. If this ellipse is translated  so that its center is now at (5,-6).

Then the translated ellipse will now have equation.

4(x-5)^2+5(y+6)^2=20

We expand to get;

4(x^2-10x+25)+5(y^2+12y+36)=20

4x^2-40x+100+5y^2+60y+180=20

4x^2+5y^2-40x+60y+100+180-20=0

4x^2+5y^2-40x+60y+260=0

6 0
4 years ago
Read 2 more answers
The ratio of two numbers is 3 to 7. The sum of the numbers is 150. What are the numbers?
Natalka [10]
45 and 105, you can put the equation as 3x+7x=150. Add them to 10x then divide, x=15 so 3*15=45, and same for the other number.
7 0
3 years ago
PLEASE HELP ME WITH MY MATH QUESTIONS IF YOU HELP ME I WILL GIVE YOU BRAINLIEST
ankoles [38]
For the graphing if for example it says (3,-9) then you start at the very middle called the origin. Then go to the right 3.(this is called the x-axis) then go down 9 (this is the y axis) stop there and put you point. I hope this kinda helps explain this to you better :/
7 0
3 years ago
Read 2 more answers
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