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3 years ago

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. Lisa is 1.50m tall. Sean is 35cm shorter. How tall is Sean 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

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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:

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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)
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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:

step(i)

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

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

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

Step(ii):-

we know that

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

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

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

Final answer:-

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

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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