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4 years ago

Evaluate 15r+6 (60-r)for r =20,30 and 40. what conclusion can you draw

Mathematics

1 answer:

7nadin3 [17]4 years ago

6 0

15 (20)+6(60-20)= 240

15 (30)+6(60-30)=630

15(40)+6(60-40)=720

you can conclude that none of the numbers have anything in common except that they all end in a 0

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Suppose sin(A) = 1/4. use the trig identity sin^2(A)+cos^2(A)=1 to find cos(A) in quadrant II. around to ten-thousandth.

larisa86 [58]

In quadrant II, $\cos(A)$ will be negative. So

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2 years ago

Evaluate the line integral ∫cf⋅dr, where f(x,y,z)=5xi−4yj+3zk and c is given by the vector function r(t)=⟨sint,cost,t⟩, 0≤t≤3π/2

Katena32 [7]

WIth the parameterization

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We also have

$\mathrm d\mathbf r=\mathbf r'(t)\,\mathrm dt=\langle\cos t,-\sin t,1\rangle\,\mathrm dt$

So in the line integral, we get

$\displaystyle\int_{\mathcal C}\mathbf f\cdot\mathrm d\mathbf r=\int_{t=0}^{t=3\pi/2}\mathbf f(\mathbf r(t))\cdot\mathbf r'(t)\,\mathrm dt$

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3 years ago

Help rn please im failing hard

azamat

Answer:

a = -40/3

Step-by-step explanation:

(7a - 4) = (4a - 44)

7a - 4 = 4a - 44

7a = 4a - 44 + 4

7a = 4a - 40

7a - 4a = - 40

3a = - 40

3a/3 = -40/3

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3 years ago

Is 6.700 equal to 6.7?

Mariulka [41]

Yes because zeros have no value if they are after a decimal and have no number behind them

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3 years ago

Read 2 more answers

HOW CAN I FIND THE COMMON DENOMINATOR FOR 1/3 AND 1/5

sergey [27]

Answer:

multiply the numerator and the denominator of each fraction by the same number till the denominators are the same number.

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4 years ago