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3 years ago

Chelsea pays a sale price of $60 for a pair of

Mathematics

1 answer:

kondor19780726 [428]3 years ago

7 0

Answer:

Regular price=$80. Savings=$20.00

Step-by-step explanation:

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Show all work and provide necessary descriptions

masya89 [10]

Let

$P=(P_x,P_y),\quad Q=(Q_x,Q_y)$

If M is the midpoint, the x and y coordinates of M are the average of the x and y coordinates of P and Q:

$M=\left(\dfrac{P_x+Q_x}{2},\ \dfrac{P_y+Q_y}{2}\right)$

We can solve this expression for the coordinates of Q:

$M_x = \dfrac{P_x+Q_x}{2} \implies Q_x = 2M_x-P_x$

$M_y = \dfrac{P_y+Q_y}{2} \implies Q_y = 2M_y-P_y$

Plug in the values for the coordinates of M and P to get

$Q_x = 2M_x-P_x = 2\cdot 5-11 = 10-11=-1$

$Q_y = 2M_y-P_y = 2\cdot (-2) - (-10) = -4+10=6$

5 0

3 years ago

Simplify to create an equivalent expression.<br> 2-4(5p+1)}2−4(5p+1)

ZanzabumX [31]

Answer:

-8-60p

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Solve each system of equations by writing a new system that eliminates one of the variables.

Rufina [12.5K]

Answer:

$x=33\\y=-41$

Step-by-step explanation:

Let:

$2x+y=25\hspace{5}(1)\\and\\4x+3y=9\hspace{5}(2)$

We need to eliminate one of the variables, so let's use elimination method. First multiply (1) by 2

$2*(1)\equiv\hspace{5}4x+2y=50$

Now subtract (2) from 2*(1) in order to eliminate x:

$2*(1)-(2)\\4x-4x+2y-3y=50-9\\-y=41$

Solving for y:

Multiplying both sides by -1

$y=-41$

Finally, replacing the value of y in (1)

$2x-41=25$

Solving for x:

add 41 to both sides:

$2x=66$

Multiply both sides by 1/2:

$x=\frac{66}{2} =33$

3 0

3 years ago

Write -0. 18 repeating as a fraction in simplest form.

galina1969 [7]

Answer:

-2/11

Step-by-step explanation:

8 0

3 years ago

34.25 multiplied by what Equals 342.5

laiz [17]

Just work backwards.

342.5/ 34.25 = 10

8 0

3 years ago