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lawyer [7]
3 years ago
15

The cost of 11 dvds and 7 cds is 172.50 and the cost of 10 dvds and 7 cds is 155.80. How much does a cd and dvd cost?

Mathematics
1 answer:
AleksandrR [38]3 years ago
5 0

Answer:

The question has a mistake

Step-by-step explanation:

11d+7c= 172.5

10d+7c= 155.8

By subtraction;

1d+ 0c = 16.7

1d = 16.7

11×16.7+7c=172.5

7c = 172.5-11*16.7

You will get a negative answer yet the cost cannot be negative.

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Does this graph represent a function? Why or why not?
bogdanovich [222]

Answer:

with my own opinion the answer is b

4 0
3 years ago
Plot the numbers -5/6 and 8/3<br>on the number line below.​
Murljashka [212]

Answer:

-5/6= -0.8333

And

8/3=2.67

On the number line they will be

8 0
3 years ago
5u^2 + 6 = -13u please help
Komok [63]

Answer:

u = -2, -3/5

General Formulas and Concepts:

<u>Algebra I</u>

  • Standard Form: ax² + bx + c = 0
  • Factoring
  • Finding roots

Step-by-step explanation:

<u>Step 1: Define equation</u>

5u² + 6 = -13u

<u>Step 2: Solve for </u><em><u>u</u></em>

  1. Rewrite:                    5u² + 13u + 6 = 0
  2. Factor:                      (u + 2)(5u + 3) = 0
  3. Find roots:                u = -2, -3/5
5 0
3 years ago
A cube has a lateral area of 676 square feet.<br> What is the side length of the cube?
sp2606 [1]

Answer:

13 ft.

Step-by-step explanation:

Lateral Surface area of a cube is the area of 4 sides, front side, back side, left side face and right side face.

It can be seen seen from the attached figure as well.

Each face in a cube is a square. And each side in the cube is equal.

So, Lateral surface area is nothing but 4 \times area of a square.

And we know that area of a square = side^{2}.

Hence, Lateral surface area = 4 \times side^{2}

As per question:

4 \times side^{2} = 676

side^2 = 169 \\\Rightarrow side = 13

Hence, side length of cube = 13 feet.

7 0
3 years ago
Is 13/8 rational have to add more letters lol
Serhud [2]
I do not believe so but dont quote me on it.
7 0
3 years ago
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