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2 years ago

Using 5 miles = 8 km, write 2 m/s in mph. Give your answer as a decimal.

Mathematics

1 answer:

svp [43]2 years ago

8 0

Answer:

4.5 mph

Step-by-step explanation:

2 m/s = (2 m/s)(60)(60) = 7200 m/h or 7.2 km/hr

if 5 miles = 8 km, then 1 km = 0.625 miles

7.2 x 0.625 = 4.5 mph

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Assoli18 [71]

Let's take this problem step by step:

To find the ordered pair of the system:

⇒ must set both equations equal to each other

⇒ and solve for 'x'

Let's solve:

$x^2-2x+3=-2x+19\\x^2-2x+2x+3-19=0\\x^2-16=0\\(x+4)(x-4)=0$

Let's find the x-values:

$(x-4)=0\\x=4\\\\(x+4)=0\\x=-4$

Let's find f(x)'s value for each 'x':

$x=4\\f(4)=-2(4)+19=-8+19=11\\\\x=-4\\f(-4)=-2(-4)+19=8+19=27$

Answer: (4, 11), (-4,27)

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1 year ago

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il63 [147K]

Answer:

Step-by-step explanation:

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1 year ago

Find the exact value of the following expression (without using a calculator): tan(Sin^-1 x/2)

Sati [7]

Answer:

tan(Sin^-1 x/2)= $\frac{x/2}{\sqrt{1-x^{2}/4 } }$

Step-by-step explanation:

Let sin^-1 x/2= θ

then sinθ= x/2

on the basis of unit circle, we have a triangle with hypotenuse of length 1, one side of length x/2 and opposite angle of θ.

tan(Sin^-1 x/2) = tanθ

tanθ= sinθ/cosθ

as per trigonometric identities cosθ= √(1-sin^2θ)

tanθ= sinθ/ √(1-sin^2θ)

substituting the value sinθ=x/2 in the above equation

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now substituting the value sin^-1 x/2= θ in above equation

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2 years ago

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Natasha_Volkova [10]

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2 years ago

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qaws [65]

Answer:

The exact is 1/339 or.00294985 but rounded it’s 1

Step-by-step explanation:

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2 years ago