1. Subtract and simplify

Mathematics

1 answer:

hodyreva [135]3 years ago

5 0

Step-by-step explanation:

1-(-y^2-4y-8)-(-4y^2-6y+3)

Simplify: 3y^2+2y−11

Subtract: 3y^2+2y-11

2. 2x^2y^3z^2*4xy^4x^2

Simplify: 8x^5y^7z^2

Subtract: 8x^5y^7z^2

3. (x-4) (x^2-5x-6)

Simplify: x^3-9x^2+14x+24

Subtract: x^3-9x^2+14x+24

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The price of an iPod is reduced in a sale from £200 to £145. The price of the iPod is further decreased by 22% two months later.

mixer [17]

Answer:

£113.1

Step-by-step explanation:

The price of an iPod is reduced in a sale from £200 to £145.

The price of the iPod is further decreased by 22% two months later. Find the new price.

The above question is solved below:

We are to find the new price.

The percentage decrease = 22%

Hence:

£ 145 × 22% = £31.9

The new price is:

£145 − £31.9 = £113.1

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3 years ago

What graph best represents the solution to the equality y - 2x > -8

Ne4ueva [31]

Answer:

<h2>In the attachment</h2>

Step-by-step explanation:

$y-2x>-8\qquad\text{add}\ 2x\ \text{to both sides}\\\\y>2x-8\\-------------------------\\\\-\ dotted\ line\\\leq,\ \geq-\ solid\ line\\,\ \geq-\ shading\ above\ the\ line\\-------------------------\\\\y=2x-8-\text{It's a linear function.}\\\text{We only need two points to draw a graph.}\\\text{Choice two arbitrary values of x, substitute to the equation,}\\\text{and calculate the values of y}.\\\\for\ x=4\to y=2(4)-8=8-8=0\to A(4,\ 0)\\for\ x=0\to y=2(0)-8=0-8=-8\to B(0,\ -8)$