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2 years ago

A) Determine which amounts of postage can be formed using just 3-cent and 10-cent stamps.

Mathematics

1 answer:

RUDIKE [14]2 years ago

8 0

wait i will take screen shot please bran-list

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(x^2 - x^(1/2))/(1-x^(1/2))

Levart [38]

$\frac { \left( { x }^{ 2 }-{ x }^{ \frac { 1 }{ 2 } } \right) }{ \left( 1-{ x }^{ \frac { 1 }{ 2 } } \right) }$

$\\ \\ =\frac { \left( { x }^{ 2 }-\sqrt { x } \right) }{ \left( 1-\sqrt { x } \right) } \cdot 1$

$\\ \\ =\frac { \left( { x }^{ 2 }-\sqrt { x } \right) }{ \left( 1-\sqrt { x } \right) } \cdot \frac { \left( 1+\sqrt { x } \right) }{ \left( 1+\sqrt { x } \right) }$

$\\ \\ =\frac { { x }^{ 2 }+{ x }^{ 2 }\sqrt { x } -\sqrt { x } -x }{ 1+\sqrt { x } -\sqrt { x } -x }$

$\\ \\ =\frac { -\sqrt { x } \left( 1-{ x }^{ 2 } \right) -x\left( 1-x \right) }{ \left( 1-x \right) }$

$\\ \\ =\frac { -\sqrt { x } \left( 1+x \right) \left( 1-x \right) -x\left( 1-x \right) }{ \left( 1-x \right) }$

$\\ \\ =\frac { \left( 1-x \right) \left\{ -\sqrt { x } \left( 1+x \right) -x \right\} }{ \left( 1-x \right) }$

$\\ \\ =-\sqrt { x } \left( 1+x \right) -x\\ \\ =-{ x }^{ \frac { 1 }{ 2 } }\left( 1+{ x }^{ \frac { 2 }{ 2 } } \right) -x$

$\\ \\ =-{ x }^{ \frac { 1 }{ 2 } }-{ x }^{ \frac { 3 }{ 2 } }-x\\ \\ =-\sqrt { x } -\sqrt { { x }^{ 3 } } -x$

3 0

3 years ago

Read 2 more answers

!!!29 POINTS!!!Will give brainlest!!!

Ludmilka [50]

A:16/333 b:16/33 c:12/25

7 0

2 years ago

Help I will mark you brainlist

vampirchik [111]

Answer:

D: 16.5

Step-by-step explanation:

Here,

Area of trapezium is 1/2 sum of parallel sides*height

as given,

1/2 (8+3)*3

1/2*33

16.5

Hope it helps!!

6 0

2 years ago

Jade is painting a rectangular wall. The wall is 414 yd long and 223 yd high. The formula for the area of a rectangle is A=bh. W

anyanavicka [17]

So remember that (a/b)(c/d)=(ac)/(bd)

convert to imporoper number for easy

4 and 1/4=4+1/4=16/4+1/4=17/4

2 and 2/3=2+2/3=6/3+2/3=8/3

length times base=17/4 times 8/3=
(17 times 8)/(4 times 3)=
136/12=
34/3=
33/3+1/3=
10+1/3=
10 and 1/3 square yards

area is 10 and 1/3 square yards

4 0

3 years ago

Read 2 more answers

18x - 77=1<br> X - 7y=-33

SIZIF [17.4K]

Answer:

x=-33+7y

then putting value of x

18(-33+7y)-77=1

-594+126y-77=1

-671+126y=1

126y=670

y=670/126

4 0

2 years ago