3 years ago

Seven less than twice a number is no more than 77

Mathematics

1 answer:

irina1246 [14]3 years ago

4 0

No because 77 is greater than the lowest number

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What is 5 x 3/7 !!! 15 POINTS !!

Sav [38]

Answer: 13/7

Step-by-step explanation: So you add a one on the bottom of the 5 then multiply it. 5X3=13 and 1X7= 7 then you get 13/7.

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3 years ago

In a survey of 100 people, 39 preferred ketchup on their hot dogs. What percent did not

Elena-2011 [213]

Answer:

C. 61%

Step-by-step explanation:

out of 100 people, 39 liked ketchup while 61 did not. The ratio and percentage is 61%

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3 years ago

Read 2 more answers

4> Solve by using Laplace transform: y'+5y'+4y=0; y(0)=3 y'(o)=o

harina [27]

Answer:

$y=3e^{-4t}$

Step-by-step explanation:

$y''+5y'+4y=0$

Applying the Laplace transform:

$\mathcal{L}[y'']+5\mathcal{L}[y']+4\mathcal{L}[y']=0$

With the formulas:

$\mathcal{L}[y'']=s^2\mathcal{L}[y]-y(0)s-y'(0)$

$\mathcal{L}[y']=s\mathcal{L}[y]-y(0)$

$\mathcal{L}[x]=L$

$s^2L-3s+5sL-3+4L=0$

Solving for $L$

$L(s^2+5s+4)=3s+3$

$L=\frac{3s+3}{s^2+5s+4}$

$L=\frac{3(s+1)}{(s+1)(s+4)}$

$L=\frac3{s+4}$

Apply the inverse Laplace transform with this formula:

$\mathcal{L}^{-1}[\frac1{s-a}]=e^{at}$

$y=3\mathcal{L}^{-1}[\frac1{s+4}]=3e^{-4t}$

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3 years ago

A burro is standing near a cactus. The burro is 58 in. tall. His shadow is 4 ft long. The shadow of the cactus is 8 ft long. Wha

Sever21 [200]

To find the height of the cactus, make a ratio.

58 inches divided by 4 feet equals x inches divided by 8 feet.

58/4 = x/8

14.5 = x/8

116 = x

The height of the cactus is 116 inches.

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3 years ago

What is the surface area of a sphere with a radius of 11cm? Use 3.14 for pi

vagabundo [1.1K]

I hope this helps you

Area=4.pi.r^2

Area =4.3,14.11^2

Area =1519

6 0

3 years ago