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3 years ago

The sentence on the bottom not on the top. GIVE U 100 POINTS PROMISE

Mathematics

2 answers:

oksian1 [2.3K]3 years ago

7 0

John dana and douglas painted a room
they have combined effort so
john+dana+douglas=total room

total room=100%=1/1=1
so 1 whole=8/8 so
2/8 is painted by john so they don't need to paint that so
so
2/8+dana+douglas=8/8
subtract 2/8 frm both sides
dana+dogluas=(8-2)/8=6/8
dana+douglas=6/8
dana painted same as douglas so divide by 2
dana=douglas=3/8

so A is 6/8 or 3/4
B is 2/8+3/8+3/8=8/8 or 2/8+dana+douglas=8/8

Annette [7]3 years ago

5 0

the answer is a but if its wrong it b

sorry im not sure

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4 years ago

Please help <br> Step by step

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The consumption of electricity in May based on the model will be 1225kw.

<h3>How to calculate the consumption?</h3>

The model that's given to calculate the consumption is:

C = 1200 + 5t

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The consumption in May will be:

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2 years ago

Identify the equation for the line tangent to the circle x^2 + y^2 = 100 at the point (−6, 8).

Vilka [71]

The equation of tangent to the circle $x^{2} +y^{2} =100$ at the point (-6,8) is -6x+8y=100.

Given the equation of circle $x^{2} +y^{2} =100$

and point at which the tangent meets the circle is (-6,8).

A tangent to a circle is basically a line at point P with coordinates is a straight line that touches the circle at P. The tangent is perpendicular to the radius which joins the centre of circle to the point P.

Linear equation looks like y=mx+c.

Tangent to a circle of equation $x^{2} +y^{2} =a^{2}$ at (z,t) is:

xz+ty= $a^{2}$ .

We have to just put the values in the formula above to get the equation of tangent to the circle $x^{2} +y^{2} =100$ at (-6,8).

It will be as under:

x(-6)+y(8)=100

-6x+8y=100

Hence the equation of tangent to the circle at the point (-6,8) is -6x+8y=100.

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2 years ago