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3 years ago

If Tommy is $47.50 and five hours for mowing grass how much will he earn for mowing grassfor seven hours

Mathematics

1 answer:

gregori [183]3 years ago

3 0

Tienes que dividirlo entre 5 y luego multiplicar entre 7 para que te dé el resultado correcto

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Which is not a rational number <br>0.77777...<br>11/13 <br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B19%7D%20" id="TexFormu

Ymorist [56]

Answer:

the square root of 19

Step-by-step explanation:

this is because it has no rational value

5 0

2 years ago

Read 2 more answers

PLEASE HELP PLEASEEEEEEE

Kitty [74]

EF and FG are equal so EF would be 6.1
6.1+6.1=12.2
EG=12.2

5 0

2 years ago

Evaluate the integral using the indicated trigonometric substitution. (use c for the constant of integration.) x^3 / sqrt x^2 +

slava [35]

$\displaystyle\int\frac{x^3}{\sqrt{x^2+49}}\,\mathrm dx$

Taking $x=7\tan\theta$ gives $\mathrm dx=7\sec^2\theta\,\mathrm d\theta$ , so that the integral becomes

$\displaystyle\int\frac{(7\tan\theta)^3}{\sqrt{(7\tan\theta)^2+49}}(7\sec^2\theta)\,\mathrm d\theta$
$=\displaystyle7^4\int\frac{\tan^3\theta\sec^3\theta}{\sqrt{49\tan^2\theta+49}}\,\mathrm d\theta$
$=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{\sqrt{\tan^2\theta+1}}\,\mathrm d\theta$
$=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{\sqrt{\sec^2\theta}}\,\mathrm d\theta$
$=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{|\sec\theta|}\,\mathrm d\theta$

When $\sec\theta>0$ , we have

$=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{\sec\theta}\,\mathrm d\theta$
$=\displaystyle7^3\int\tan^3\theta\sec^2\theta\,\mathrm d\theta$

and from here we can substitute $u=\tan\theta$ to proceed from here.

Quick note: When we set $x=7\tan\theta$ , we are implicitly enforcing $-\dfrac\pi2$ just so that the substitution can be undone later via $\theta=\tan^{-1}\dfrac x7$ . But note that over this domain, we automatically guarantee that $\sec\theta>0$ , so the absolute value bars can be dropped immediately.

6 0

2 years ago

What is the distance between the two points (-2 ,1 )and (4, 3)

kirill [66]

Solution:

Distance between two points = √(3−4)^2+(−2−3)^2

= √(−1)^2+(−5)^2

= √1+25

= √26

= 5.099

Distance between points (4, 3) and (3, -2) is 5.099.

3 0

3 years ago

Write an expression for the following situation and solve. Mr. Simms bought 20 pencils. He used 1/4 of the pencils and then gave

Aleonysh [2.5K]

Hi!
1/4 of 20 pencils are 5 pencils.
Since he gave away 4 pencils,
Total = 5 + 4 = 9
Mr. Simms use and give away total 9 pencils.

6 0

3 years ago

If Tommy is $47.50 and five hours for mowing grass how much will he earn for mowing grassfor seven hours￼

If Tommy is $47.50 and five hours for mowing grass how much will he earn for mowing grassfor seven hours