3 years ago

Please help me answer 5 and 6.

Mathematics

1 answer:

Kryger [21]3 years ago

5 0

For number 5 you are just multiplying by 4.5

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(1 point) consider the function f(t)=⎧⎩⎨⎪⎪⎪⎪0,−5,−6,6,t<00≤t<11≤t<7t≥7;f(t)={0,t<0−5,0≤t<1−6,1≤t<76,t≥7; 1. wr

sergij07 [2.7K]

$f(t)=\begin{cases}0&\text{for }t$

Recall that

$u(t)=\begin{cases}0&\text{for }t$

Take it one piece at a time. For $t\ge0$ , we can scale $u(t)$ by -5:

$-5u(t)=\begin{cases}0&\text{for }t$

If we shift the argument by 1 and scale by -5, we have

$-5u(t-1)=\begin{cases}0&\text{for }t$

so if we subtract this from $-5u(t)$ , we'll end up with

$-5u(t)+5u(t-1)=\begin{cases}0&\text{for }t$

For the next piece, we can add another scaled and shifted step like

$-6u(t-1)+6u(t-7)=\begin{cases}0&\text{for }t$

so that

$-5u(t)+5u(t-1)-6u(t-1)+6u(t-7)=\begin{cases}0&\text{for }t$

For the last piece, we add one more term:

$6u(t-7)=\begin{cases}0&\text{for }t$

and so putting everything together, we get $f(t)$ :

$f(t)\equiv-5u(t)+5u(t-1)-6u(t-1)+6u(t-7)+6u(t-7)$
$f(t)\equiv-5u(t)-u(t-1)+12u(t-7)$

5 0

3 years ago

please help :( please help :( please help :( please help :( please help :( please help :( please help :( please help :(

yanalaym [24]

Answer:

64 for number 1. Not sure on number 2 sorry.

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

What is the area of a sector with a central angle of 131 degrees and a radius of 7.2 ft?

svetoff [14.1K]

Answer:

162.78

Step-by-step explanation:

Use your π =3.14

3.14 times 7.2 times 7.2

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3 years ago

Michael wrote a novel that sells for $20 dollars each. He received a bonus of $50,000 to sign the contract to write the book, an

Marat540 [252]

$50000 + (9%x(10000x$20)=
$50000 + (9%x$200000)=
$50000 + $18000=
$68000

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3 years ago

Write in slope intercept form.<br> 15x − 4y = 11

kvv77 [185]

Answer:

y = 15/4x - 11/4

Step-by-step explanation:

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3 years ago