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goldfiish [28.3K]
3 years ago
13

1.Find the perimeter of the picture frame.

Mathematics
1 answer:
labwork [276]3 years ago
5 0

Perimeter of the frame is 60 in and perimeter of the picture is 52 in. Area of the picture is 160 in²

Step-by-step explanation:

  • Step 1: Find the perimeter of the frame when width = 12 in and length = 18 in

Perimeter of the frame = 2 (length + width)

                                      = 2(18 + 12) = 2 × 30 = 60 in

  • Step 2: Find the perimeter of the picture inside the frame.

Length of the picture = 18 - 2 = 16 in

Width of the picture = 12 - 2 = 10 in

⇒ Perimeter of the picture = 2 (length + width)

                                            = 2 ( 16 + 10) = 2 × 26 = 52 in

  • Step 3: Find the area of the picture.

Area = length × width

        = 16 × 10 = 160 in²

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Divide 9y power 2 by 3<br><br>divide (8x power 2 +4x ) by 2x​
olchik [2.2K]

Answer:

1=27

2=34

Step-by-step explanation:

1)9y power 2÷3

or, y=9 power 2÷3

or, y=9×9÷3

or, y=81÷3

or, y=27

2) (8x power 2+4x)÷2

=(8x×8+4x)÷2

=(64x+4x)÷2

=68x÷2

or, x=68÷2

or, x=34

4 0
3 years ago
Jay sells 10 packs of apples for 80p. He wants to make £75 at the end of the year. How many packs of apples does he need to sell
ipn [44]

Answer:

937.5 packs of apples

Step-by-step explanation:

Note that:

100p = £1

80p = x

Cross Multiply

100x = 80p × £1

x = 80/100

x = £0.8

Jay sells 10 packs of apples for 80p.

Hence:

£0.8 = 10 packs of apples

£75 = x

Cross Multiply

£0.8 × x = £75 × 10 Packs

x = £75 × 10 Packs/£0.8

x = 937.5

Therefore, to make £75 at the end of the year, he has to sell 937.5 packs of apples

3 0
2 years ago
Consider the function f(x)= 2/5x-4
Gre4nikov [31]

Answer: a) \frac{5}{2}x+10=f^{-1}(x)=g(x)

Step-by-step explanation:

Since we have given that

f(x)=\frac{2}{5}x-4

a.) Find the inverse of f(x) and name it g(x).

Let f(x) = y

So, it becomes

y=\frac{2}{5}x-4

Switching x to y , we get

x=\frac{2}{5}y-4

5x=2y-20\\\\5x+20=2y\\\\\frac{5x+20}{2}=y\\\\\frac{5}{2}x+10=y\\\\\frac{5}{2}x+10=f^{-1}(x)=g(x)

b) . Use composition to show that f(x) and g(x) are inverses of each other.

\mathrm{For}\:f=\frac{2}{5}x-4\:\\\\\mathrm{substitute}\:x\:\mathrm{with}\:g\left(x\right)=\frac{5}{2}x+10\\\\=\frac{2}{5}\left(\frac{5}{2}x+10\right)-4\\\\=x

Similarly,

\mathrm{g\left(x\right)=\frac{5}{2}x+10,\:f\left(x\right)=\frac{2}{5}x-4,\:g\left(x\right)\circ \:f\left(x\right)}\\\\\mathrm{For}\:g=\frac{5}{2}x+10\:\mathrm{substitute}\:x\:\mathrm{with}\:f\left(x\right)=\frac{2}{5}x-4\\\\=\frac{5}{2}\left(\frac{2}{5}x-4\right)+10\\\\=x

so, both are inverses of each other.

c) Draw the graphs of f(x) and g(x) on the same coordinate plane.

As shown below in the graph , Since for inverse function we need an axis of symmetry i.e. y=x

And both f(x) and g(x) are symmetry to y=x.

∴ f(x) and g(x) are inverses of each other.


5 0
3 years ago
Express 50p as a fraction of £8<br> Give your answer in its simplest form.
Sonbull [250]

Answer:

1/16

Step-by-step explanation:

Convert 50p to pound sterling.

50p = £0.5

Divide £0.5 with £8.

0.5/8

Simplify the fraction.

0.5×2/8×2

1/16

5 0
3 years ago
Read 2 more answers
According to these three facts, which statements are true?
Norma-Jean [14]
Sinuar and radius of 16 are true
8 0
3 years ago
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