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2 years ago

Please solve. 5+ 1/7x= -2

Mathematics

2 answers:

elena-s [515]2 years ago

8 0

5+1/7x=-2
-5 -5
1/7x= -7

X= -49

BARSIC [14]2 years ago

5 0

The answer is -49 to the equation

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Evaluate the integral. (sec2(t) i t(t2 1)8 j t7 ln(t) k) dt

polet [3.4K]

If you're just integrating a vector-valued function, you just integrate each component:

$\displaystyle\int(\sec^2t\,\hat\imath+t(t^2-1)^8\,\hat\jmath+t^7\ln t\,\hat k)\,\mathrm dt$

$=\displaystyle\left(\int\sec^2t\,\mathrm dt\right)\hat\imath+\left(\int t(t^2-1)^8\,\mathrm dt\right)\hat\jmath+\left(\int t^7\ln t\,\mathrm dt\right)\hat k$

The first integral is trivial since $(\tan t)'=\sec^2t$ .

The second can be done by substituting $u=t^2-1$ :

$u=t^2-1\implies\mathrm du=2t\,\mathrm dt\implies\displaystyle\frac12\int u^8\,\mathrm du=\frac1{18}(t^2-1)^9+C$

The third can be found by integrating by parts:

$u=\ln t\implies\mathrm du=\dfrac{\mathrm dt}t$

$\mathrm dv=t^7\,\mathrm dt\implies v=\dfrac18t^8$

$\displaystyle\int t^7\ln t\,\mathrm dt=\frac18t^8\ln t-\frac18\int t^7\,\mathrm dt=\frac18t^8\ln t-\frac1{64}t^8+C$

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3 years ago

1. Nine students in an accounting class passed midterm exam. If there were 20 students in the class,

Marysya12 [62]

Answer:

Step-by-step explanation:

Passed Percentage= (9/20) * 100 = 9 * 5 = 45%

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3 years ago

Read 2 more answers

Plz help me well mark brainliest if correct!.,

AlekseyPX

Answer: The perimeter is 20 cm

Step-by-step explanation: The top and bottom are same length, so 6+6, and the sides are the same length, so 4+4 don’t forget it’s cm and it becomes 20 cm.

PERIMITER = ADDING ALL SIDES

AREA = MULTIPLYING

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2 years ago

I need help please

gulaghasi [49]

Answer:

Step-by-step explanation:

AO = OC

3x - 4 = 8

x = 4

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2 years ago

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Eight more than x is at least fourteen. what is the solution set for x?

Otrada [13]

X + 8 >= 14
x >= 14 -8
x> = 6

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2 years ago