What is this please help

Mathematics

1 answer:

Aleksandr [31]3 years ago

8 0

Simplify 3×9 to 27=

27+10×36/6

2 Use this rule: a×b/c=ab/c

27+10×36/6

3 Simplify 10×36 to 360=

27+ 360/6

simplify 360/6 to 60=

27+60

Simplify.

87

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I read it and I don’t get it

sertanlavr [38]

1) 9+6 = 15
15+31 = 46

2) (12.5+0) + (1+43.5)
12.5+44.5
= 57

So answer to number 1 is 46
Answer to number 2 is 57

3 0

3 years ago

Solve for x:<br> 2(5 – 3x) < x - 4(3 - x)

Setler [38]

Answer: x > 2

Step-by-step explanation: PLEASE GIVE BRAINLIEST HELPS A LOT

6 0

3 years ago

Find, correct to four decimal places, the length of the curve of intersection of the cylinder 16x2 + y2 = 16 and the plane x + y

lubasha [3.4K]

First find a parameterization for the curve of intersection.

Given the equation of a cylinder, a natural choice for a parameterization would be one utilizing cylindrical coordinates. Here,

$16x^2+y^2=16\implies x^2+\left(\dfrac y4\right)^2=1$

which suggests we could use

$\begin{cases}x(t)=\cos t\\y(t)=4\sin t\\z(t)\end{cases}$

with $0\le t\le2\pi$ , and we get $z(t)$ from the equation of the plane,

$x+y+z=12\implies z(t)=12-x(t)-y(t)=12-\cos t-4\sin t$

Now use the arc length formula:

$\displaystyle\ell=\int_0^{2\pi}\sqrt{\left(\dfrac{\mathrm dx}{\mathrm dt}\right)^2+\left(\dfrac{\mathrm dy}{\mathrm dt}\right)^2+\left(\dfrac{\mathrm dz}{\mathrm dt}\right)^2}\,\mathrm dt$