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2 years ago

Find the length of side BC. Give your answer to 3 significant figures. C A 71° B

Mathematics

2 answers:

lana66690 [7]2 years ago

5 0

Answer:

19.4°

Step-by-step explanation:

I put the image of how I did it if you don't understand let me know

Vikki [24]2 years ago

4 0

Answer:

BC ≈ 19.4 cm

Step-by-step explanation:

using the cosine ratio in the right triangle

cos71° = $\frac{adjacent}{hypotenuse}$ = $\frac{AB}{BC}$ = $\frac{6.3}{BC}$ ( multiply both sides by BC )

BC × cos71° = 6.3 ( divide both sides by cos71° )

BC = $\frac{6.3}{cos71}$ ≈ 19.4 cm ( to 3 sig. figs )

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What is the radius of a circle whose equation is x^2+y^2-10x+6y+18=0

hichkok12 [17]

to find the radius of x^2+y^2-10x+6y+18=0, we must complete the square:

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Then:

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3 years ago

Please help- Geometry question!!

trasher [3.6K]

The arc length of AB = 8.37 meters

Solution:

Degree of AB (θ) = 60°

Radius of the circle = 8 m

Let us find the arc length of AB.

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$$\text { Arc length }=2 \pi r\left(\frac{\theta}{360^{\circ}}\right)$

$$=2 \times 3.14 \times 8\left(\frac{60^{\circ}}{360^{\circ}}\right)$

$$=2 \times 3.14 \times 8\left(\frac{1}{6}\right)$

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5 0

3 years ago

What is 3.4 times 16?

Maru [420]

Answer:

54.4

Step-by-step explanation:

3.4*16=54.4

5 0

3 years ago

Read 2 more answers

determine the equation of the parabola (simplified) with roots -3+sqrt6 and -3-sqrt6, and passing through the point (-1,4)

klio [65]

Given:

Roots:

$\begin{gathered} -3+\sqrt[]{6} \\ -3-\sqrt[]{6} \end{gathered}$

Point: (-1,4)

To determine the equation of the parabola with the given roots and point, we find the missing values first.

Since the roots are given, we can say that the equation is:

$y=a(x+3-\sqrt[]{6})(x+3+\sqrt[]{6})$

Next, we expand the terms.

$y=a(x^2+6x+3)$

Then, we plug in x= -1, and y=4 into the equation to get the value of a.

$\begin{gathered} y=a(x^2+6x+3) \\ 4=a((-1)^2+6(-1)+3) \\ \text{Simplify and rearrange} \\ 4=a(-2) \\ a=\frac{4}{-2} \\ a=-2 \end{gathered}$

So,

$undefined$

6 0

2 years ago

on a coordinate grid, her house is located at (1,2) and the park at (5,5) what is the shortest distance from her house to the pa

nadya68 [22]

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3 0

3 years ago