What's the markdown price of this red dress

Mathematics

1 answer:

il63 [147K]3 years ago

3 0

It was marked down $18.49.

You might be interested in

Use the given information to find the unknown value:y varies directly as the square of z. When x = 2, then y= 20. Find y when 2

Vladimir79 [104]

Answer

y = 45 when x = 3

Step-by-step explanation:

$\begin{gathered} \text{Given that y varies directly as the square of x} \\ \text{This implies that there is a positive relationship betwe}en\text{ y and the square of z} \\ \text{Mathematically, this can be expressed as} \\ y\text{ }\propto x^2 \\ To\text{ turn this expression into an equation, we n}eed\text{ to introduce a proportionality constant k} \\ y=kx^2 \\ \text{ According to the question, y = 20 and x = 2} \\ \text{From the above informaion we can find our k} \\ y=kx^2 \\ 20\text{ = k }\cdot2^2 \\ 20\text{ = k }\cdot\text{ 4} \\ \text{Divide both sides by 4} \\ \frac{20}{4}\text{ = }\frac{k\cdot\text{ 4}}{4} \\ k\text{ = 5} \\ \text{ Find y when }x\text{ = 3} \\ y=kx^2 \\ y\text{ = 5 }\cdot(3)^2 \\ y\text{ = 5 }\cdot\text{ 9} \\ y\text{ = 45} \end{gathered}$

8 0

1 year ago

What does a equal -5(6a+21)=-15

Anettt [7]

Step 1 remove paranthesis
(-30a-105)=-15

Step 2: Move constant to RHS (take not negative sign is removed if sides are changed and vice versa)

-30a=-15+105
-30a=90

Step 3: Simplify
-a=3

Step 4: remove negative sign from variable
a=3

6 0

2 years ago

Explain how you can use base ten block to find 2.16÷3

Andrei [34K]

You can use base ten blocks to find 2.16/ 3 by using 7 base ten blocks and 2 base one blocks.

6 0

3 years ago

Read 2 more answers

Help, Help me, please

11Alexandr11 [23.1K]

8×5×12in^2+8×5×10in^2+12×10in^2=480 in^2+400in^2+120in^2=1000in^2 if one takes all the angles

If not then the answer would be 420in^2+120in^2=540in^2