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Zigmanuir [339]
3 years ago
8

David bought three DVDs and four books for $40 at a yard sale. Anna bought one DVD and six books for $18. how much did each DVD

and book cost ?
Mathematics
1 answer:
Dvinal [7]3 years ago
5 0

Answer: Anna bought 1 DVD and 6 books for $18. How much did each DVD and book cost? ... Your equations (2 unknowns and two equations, d is for a DVD and b is ... For Anna: d+6b=18 ... Combined equation: −14b=−14 and b=1 (means that each book worths $1). Now for DVD price,

Step-by-step explanation:

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Help how to solve! 24=3r divided by 4
zhenek [66]

24=3r/4

Multiply both sides by 4

24=(3r)/4

(24)*(4)=(3r/4)*(4)

96=3r

Flip the equation

3r=96

Divide both sides by 3

3r/3=96/3

r=32

Now lets check if the answer is good

24=3(32)/4

24= 96/4

24=24

You see , the answer is good .


I hope that's help ! Let me know .

6 0
3 years ago
Joe paid 14.00 for a board game this is 70% off the original price what is the original price?
soldi70 [24.7K]

Answer:

The correct option is B.

Step-by-step explanation:

It is given that Joe paid 14.00 for a board game this is 70% of the original price what is the original price.

Let the original price of board game be x.

x\times \frac{70}{100}=14

x\times \frac{7}{10}=14

Multiply both sides by 10.

7x=140

Divide both sides by 7.

x=20

The original price is 20. Therefore the correct option is B.

6 0
3 years ago
6 (x-3)=4 (x-4)+2 (x-1) how many solutions are possible for the equation
olga2289 [7]
Indefinitely many solutions is the answer to this problem. All real numbers are solutions. The answer was 0=0.
4 0
3 years ago
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Ratio Question:
netineya [11]

Answer:

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Step-by-step explanation:

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3 0
2 years ago
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Y=3xy-1, Solve for y
Ket [755]

Answer:

y = \frac{1}{3x-1}

Step-by-step explanation:

Given

y = 3xy - 1

Collect terms in y on the left side by subtracting 3xy from both sides

y - 3xy = - 1 ← factor out y on the left side

y(1 - 3x) = - 1 ( divide both sides by 1 - 3x

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y = \frac{1}{3x-1}

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3 years ago
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