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Rainbow [258]
2 years ago
15

If 9: x= x4, then x=

Mathematics
1 answer:
Furkat [3]2 years ago
3 0

Answer:

x = ±6

Step-by-step explanation:

9 : x = x : 4

9/x = x/4

Cross multiply.

x² = 9 × 4

x² = 36

x = ±√36

x = ±6

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The arc length of a circle of radius 4 is 6.9813. What is the central angle created by the arc? Round
gladu [14]

The central angle is 2 radians.

Step-by-step explanation:

Arc length of circle = 6.9813

Radius of circle = 4

Central angle = ?

The formula used to find central angle is :

s=r\theta

where s= arc length, r = radius and Ф= central angle

We are given:

s= 6.9813 and r = 4 , finding central angle:

s=r\theta\\6.9813=4*\theta\\\theta=\frac{6.9813}{4}\\\theta=1.7453 \,\,radians

Rounding off to nearest whole number:

theta=1.7453 \,\,radians\\theta=2 \,\,radians

So, The central angle is 2 radians.

Keywords: Central angle of circle

Learn more about Central angle of circle at:

  • brainly.com/question/10610299
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  • brainly.com/question/8618791

#learnwithBrainly

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2 years ago
What is the area of this triangle? Use the formula A=bh/2 A. 22 yd² B. 16 yd² C. 14 yd² D. 8 yd²
Lorico [155]
A = (1/2) b* h
OR
A = (b*h)/2
A = (8* 2)/2
A = 16/2
A = 8 yd^2
Letter D
3 0
3 years ago
!! WILL MARK BRAINLIEST!
Lana71 [14]

Answer:

the debt ratio remains the same

8 0
2 years ago
<img src="https://tex.z-dn.net/?f=%28%20%5Cfrac%7B1%7D%7B2%7D%20%20%7Ba%7D%5E%7B2%7D%20%20%2B%20%20%20%5Cfrac%7B1%7D%7B2%7D%20ab
Zigmanuir [339]

Answer:

\frac{1}{2} (a + 2b)(a - b)

Step-by-step explanation:

Assuming you require the expression to be factored

Given

\frac{1}{2} a² + \frac{1}{2} ab - b² ← factor out \frac{1}{2} from each term

= \frac{1}{2} (a² + ab - 2b²) ← factor the quadratic

Consider the factors of the coefficient of the b² term(- 2) which sum to give the coefficient of the ab- term (+ 1)

The factors are + 2 and - 1, since

2 × - 1 = - 2 and 2 - 1 = + 1, thus

a² + ab - 2b² = (a + 2b)(a - b) and

\frac{1}{2} a² + \frac{1}{2} ab - b² = \frac{1}{2}(a + 2b)(a - b)

5 0
2 years ago
Please help with this question p
Gemiola [76]

Answer:

160 cm²

Step-by-step explanation:

V = 1/3 * 24 * 20 = 160 cm²

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