3 years ago

After spending 5/9 of his money, David has$36 left. How much money did he have at first?

1 answer:

liq [111]3 years ago

8 0

81 dollars at first

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Andru [333]

Yes because it goes up and back down

4 0

4 years ago

Diano4ka-milaya [45]

Answer:

$A(0.8,\ 1.4)\ \text{or }\ A\left(\dfrac{4}{5},\dfrac{7}{5}\right)$

Step-by-step explanation:

If point $A(x,y)$ divides the segment with endpoints $C(x_1,y_1)$ and $D(x_2,y_2)$ in the ratio $m:n,$

then

$x=\dfrac{nx_1+mx_2}{m+n}\\ \\y=\dfrac{ny_1+my_2}{m+n}$

In your case,

$C(-4,3)\\ \\D(8,-1)\\ \\m:n=2:3$

then

$x=\dfrac{3\cdot (-4)+2\cdot 8}{2+3}=\dfrac{-12+16}{5}=\dfrac{4}{5}=0.8\\ \\y=\dfrac{3\cdot 3+2\cdot (-1)}{2+3}=\dfrac{9-2}{5}=\dfrac{7}{5}=1.4$

Thus,

$A(0.8,\ 1.4)\ \text{or }\ A\left(\dfrac{4}{5},\dfrac{7}{5}\right)$

3 0

3 years ago

inna [77]

The answer is 8.4x10^5

7 0

3 years ago

Svetllana [295]

answer

y=-7.4x+0.7

Step-by-step explanation:

3 0

3 years ago

Lina20 [59]

2) 4 is not a solution.
3) -1 is not a solution.
4) 0 is a solution.
5) 0.23 is not a solution.
6) 2/3 is a solution.

6 0

3 years ago

After spending 5/9 of his money, David has$36 left. How much money did he have at first?​