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Elis [28]
3 years ago
10

PLEASE HELP!!!!!! GEOMETRY

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
8 0

Answer:

∠KNC and ∠KMC are right angles

∠MCN = 25°

Step-by-step explanation:

if KM and KN are tangent lines, then they are perpendicular to the radius going through the tangent point, so therefore right angles are:

1. ∠KNC

2. ∠KMC

the outside angle of a circle is equivalent to half the measure of the intercepted arc, so

if ∠MKN = 50°, then ∠MCN = 25°

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2.<br> Lisa is 1.50m tall. Sean is 35cm shorter. How tall is Sean<br> in metres?
Olegator [25]

Answer:

Sean is 1.15m

Step-by-step explanation:

35cm = 0.35m

Lisa is 1.5m tall and Sean is 0.35m shorter

1.5m - 0.35m = 1.15m

Sean is 1.15m

5 0
3 years ago
There are 6 girls and 8 boys invited to the party. What is the ratio of girls to boys
Ber [7]

Answer:

6:8

6/8 or 3/4

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Help me with the part b!
ra1l [238]
Average speed =   (distance final - distance initial)/(time final - time initial)
Average speed = (30-0)km /(100 -0)min = 3/10 km/min

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7 0
3 years ago
If y = 3x^3 - 2x and dx/dt equals 3, find dy/dt when x = -2. Give only the numerical answer. For example, if dy, dt = 4, type on
Nadya [2.5K]

Answer:

 \frac{dy}{dt}  = 102

Step-by-step explanation:

<u>step(i)</u>

Given function y = 3 x³ - 2 x  ... (i)

Differentiating equation (i) with respective to 'x'

    \frac{dy}{dx} = 3 (3 x^{2} ) - 2(1)

Given x = -2

(\frac{dy}{dx} ) x_{=-2} = 3 (3 (-2)^{2} ) - 2(1)

(\frac{dy}{dx} ) x_{=-2} = 36 -2 =34

<u><em>Step(ii):-</em></u>

<u><em>we know that </em></u>

                     \frac{dy}{dx} = \frac{\frac{dy}{dt} }{\frac{dx}{dt} }

Given    \frac{dx}{dt} = 3  and \frac{dy}{dx} = 34

                  \frac{dy}{dx} = \frac{\frac{dy}{dt} }{\frac{dx}{dt} }

substitute values    \frac{dx}{dt} = 3  and \frac{dy}{dx} = 34  

           ⇒        34 = \frac{\frac{dy}{dt} }{3 }

cross multiplication , we get

                      \frac{dy}{dt} = 34( 3 ) = 102

<u><em>Final answer</em></u>:-

 \frac{dy}{dt} = 34( 3 ) = 102

8 0
3 years ago
Henry had beaten 12 levels in a video game. If the ratio of levels he had beaten to not
babunello [35]
12 / 6 = 2

2 x (6 + 1) = 14
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2 years ago
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