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4 years ago

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.

Mathematics

2 answers:

KatRina [158]4 years ago

7 0

Answer:

First question: f(x) = 23(1.17)ˣ; Second question: f(x) = 27(1.13)ˣ; Third question: f(x) = 13x - 170; Fourth question: f(x) = 17x + 23

Explanation:

First question: Shop A sells 11 units and Shop B sells 12 units. Together, this is 11+12 = 23 units. The rate of sales is expected to increase by 17%; this means they will sell 100% of the current sales and an extra 17%:

100+17 = 117%; 117% = 117/100 = 1.17

This gives us the equation f(x) = 23(1.17)ˣ

Second question: We want to find the difference between element A, 44(1.13)ˣ, and element B, 17(1.13)ˣ:

44(1.13ˣ) - 17(1.13ˣ)

Factor out the common factor, 1.13ˣ:

1.13ˣ(44-17) = 1.13ˣ(27) = 27(1.13)ˣ

Third question: Selling x shirts for $13 each gives us the expression 13x. She plans to donate $270; this means she would subtract it from her profits, giving us the function

f(x) = 13x-270

Fourth question: We subtract the length of the patio, 13x+6, from the length of the backyard, 30x+29:

30x+29 - (13x+6) = 30x+29 - 13x - 6

Combine like terms:

30x-13x + 29-6

17x + 23

This gives us the function

f(x) = 17x + 23

Andrej [43]4 years ago

5 0

1) Jason: Shop A - 11 units; Shop B - 12 units. Sales increase at 17% per week. So, 11 + 12 = 23.

f(x) = 23(1.17)ˣ

2) Daniel: Element A temp - 44(1.13)ˣ ; Element B temp - 17(1.13)ˣ. How much temp of Element A be more than the temp of Element B.

f(x) = 44(1.13)ˣ - 17(1.13)ˣ = 27(1.13)ˣ
f(x) = 27(1.13)ˣ

3) Maggie: Tshirt price - $13. Charity donation - 270

f(x) = 13x - 270

4) Mr. Smith: Length of backyard - 30x + 29 ; Length of square patio - 13x + 6
Length not covered by the patio.

f(x) = (30x + 29) - (13x + 6) = 30x - 13x + 29 - 6 = 17x + 23
f(x) = 17x + 23

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bagirrra123 [75]

For firework launched from height 100ft with initial velocity 150ft/sec, equation made is correct

(a) equation will be $h(t) = -16t^2+150t+100$

(b) Now we have to see when it will land. At land or ground level height h will be equal to 0. So simply plug 0 in h place in equation made in part (a)

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then $t = \frac{-150-170}{-32} = \frac{-320}{-32} = 10$

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For t =4 seconds, $h = -16(4)^2+150(4)+100 = 444 feet$

For t =6 seconds, $h = -16(6)^2+150(6)+100 = 424 feet$

For t =8 seconds, $h = -16(8)^2+150(8)+100 = 276 feet$

For t =10 seconds, $h = -16(10)^2+150(10)+100 = 0 feet$

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$x = \frac{-b}{2a}$

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$x = \frac{-b}{2a}$

so t = 4.6875

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For t =4.6875, $h = -16(4.6875)^2+150(4.6875)+100 = 451.563$

so vertex is at (4.6875, 451.563)

(f) As the firework is launched so in starting time is t=0, we cannot have time before t=0 (negative values) practically. Also we cannnot have firework going down into the ground so we cannot have h value negative physically.

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