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Allushta [10]
3 years ago
5

Can someone help me solve this?

Mathematics
1 answer:
Dovator [93]3 years ago
8 0

Answer:

5 felt pads.

7 cards.

Step-by-step explanation:

Remark

  • The total number of items is 12
  • So let the felt sheets be x
  • Let the cards = y

Equations and Solution

x + y = 12

Now the price is 7.75 that she has to pay for the 12 items. She wants to come back with 0 dollars.

0.5x + 0.75y = 7.75             Multiply this equation by 2

x + 1.5y = 15.50                    write the first equation underneath and subtract.

<u>x +    y =   12</u>

      .5y =  3                          Divide by 0.5

y = 3/0.5

y = 7

So she can get 7 cards.

x + y = 12

x + 7 = 12

x = 12 - 7

x = 5

So she can buy 5 felt pads.

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I need help with this one please
Semmy [17]

Answer:

A

Step-by-step explanation:

a geometric sequence is where we multiply a factor from element to element.

a1 = $900

a2 = 981 = a1 × f = 900 ×

a3 = 1069.29 = a2 × f = a1 × f × f = s1 × f²

an = 900 \times  {f}^{n - 1}

so, now let's try and get f.

remember, 981 = 900 × f

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just to control, we check for s3 :

900 × (1.09)² = 900 × 1.1881 = 1069.29

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so,

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there is a nice formula for sums of finite sequences

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aivan3 [116]

Option D:

x

Solution:

Given compound inequality:

6-x>15 \text { or } 2 x-9 \geq 3

Let us first solve 6-x>15.

Subtract 6 from both sides.

6-x-6>15-6

-x>9

To reverse the inequality multiply by -1  on both sides.

(-x)(-1)

x

Now solve the next inequality 2 x-9 \geq 3.

Add 9 on both sides.

2 x-9+9 \geq 3+9

2 x \geq 12

Divide by 2 on both sides.

$\frac{2 x}{2} \geq \frac{12}{2}

x \geq 6

Combine the inequality.

x

Option D is the correct answer.

5 0
3 years ago
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