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Lisa [10]
3 years ago
6

Which is not equal to 30?

Mathematics
2 answers:
Rom4ik [11]3 years ago
6 0

Answer:

(2×60÷30) × (24+2)

Step-by-step explanation:

It equals 104

ch4aika [34]3 years ago
4 0

Answer:

(2*60/30)*(24+6)

Step-by-step explanation:

(2*60/30)*(24+6)

(120/30)*(26)

4*26

104

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1 because with the term just being x^3, the coefficient that goes with just an x is always 1.

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3 years ago
Use the chain rule to find dw/dt. w = ln x2 + y2 + z2 , x = 7 sin(t), y = 9 cos(t), z = 6 tan(t)
DENIUS [597]
By the chain rule,

\dfrac{\mathrm dw}{\mathrm dt}=\dfrac{\partial w}{\partial x}\dfrac{\mathrm dx}{\mathrm dt}+\dfrac{\partial w}{\partial y}\dfrac{\mathrm dy}{\mathrm dt}+\dfrac{\partial w}{\partial z}\dfrac{\mathrm dz}{\mathrm dt}

We have

\dfrac{\partial w}{\partial x}=\dfrac{2x}{x^2+y^2+z^2}
\dfrac{\partial w}{\partial y}=\dfrac{2y}{x^2+y^2+z^2}
\dfrac{\partial w}{\partial z}=\dfrac{2z}{x^2+y^2+z^2}

\dfrac{\mathrm dx}{\mathrm dt}=7\cos t
\dfrac{\mathrm dy}{\mathrm dt}=-9\sin t
\dfrac{\mathrm dz}{\mathrm dt}=6\sec^2t

So we have

\dfrac{\mathrm dw}{\mathrm dt}=\dfrac2{x^2+y^2+z^2}\left(7x\cos t-9y\sin t+6z\sec^2t\right)
\dfrac{\mathrm dw}{\mathrm dt}=\dfrac{2\left(49\sin t\cos t-81\cos t\sin t+36\tan t\sec^2t\right)}{49\sin^2t+81\cos^2t+36\tan^2t}
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3 0
3 years ago
what number should be added to the expression x^2 + 10x to change it into a perfect square trinomial?​
Annette [7]

Answer:

\large\boxed{5^2=25}

Step-by-step explanation:

\text{Perfect square:}\ (a+b)^2=a^2+2ab+b^2\\\\x^2+10x\\\Downarrow\\x^2+2(x)(5)\\\Downarrow\\x^2+2(x)(5)+5^2=(x+5)^2

3 0
3 years ago
Read 2 more answers
Louie is trying to find a rectangular canvas for his art project. Its width must measure 20 inches and form a 35° angle with the
Anastasy [175]

Answer:

14.0 inches

Step-by-step explanation:

I took the quiz and got it right!

8 0
2 years ago
If 3 boys can build 12 model airplanes in a certain length of time, how many planes can 15 boys make in the same length of time
zubka84 [21]
It would be five times as many planes so 12*5=60 planes
4 0
2 years ago
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