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3 years ago

Solve the inequality 42<-6d

Mathematics

1 answer:

pentagon [3]3 years ago

6 0

Answer:

d < - 7

Step-by-step explanation:

given

42 < - 6d ( divide both sides by - 6 )

Remembering to reverse the inequality symbol as a consequence

- 7 > d ⇒ d < - 7

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Solve: A = 4pir2 for r.

Airida [17]

r means radius so it can't be negative.

<=>

A = 4 pi r²

r = sqr (A / 4pi)

5 0

3 years ago

-30 + 5a < 16 A. a 9.2 C. a < 9.2 a> -2.8 a < -2.8

Goryan [66]

Answer:

-30 + 5a < 16

5a < 46

$a < \frac{46}{5}$

a < 9.2

Hope this help...

4 0

2 years ago

What is the radius of a circle whose equation is x2 y2 8x – 6y 21 = 0?

andrew11 [14]

we know that

the standard form of the equation of the circle is

$(x-h)^{2} +(y-k)^{2}=r^{2}$

where

(h,k) is the center of the circle

r is the radius of the circle

In this problem we have

$x^{2} +y^{2} +8x-6y+21=0$

Convert to standard form

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$(x^{2}+8x) +(y^{2}-6y)=-21$

Complete the square twice. Remember to balance the equation by adding the same constants to each side.

$(x^{2}+8x+16) +(y^{2}-6y+9)=-21+16+9$

$(x^{2}+8x+16) +(y^{2}-6y+9)=4$

Rewrite as perfect squares

$(x+4)^{2} +(y-3)^{2}=4$

$(x+4)^{2} +(y-3)^{2}=2^{2}$

the center of the circle is $(-4,3)$

the radius of the circle is $2\ units$

therefore

the answer is

the radius of the circle is $2\ units$

8 0

3 years ago

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What property is 7. (6 - 1) 7.6 - 7.1

MA_775_DIABLO [31]

Answer:

associatve property

Step-by-step explanation:

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2 years ago

Name the corresponding part if ∆RST ≅ ∆WXY ∠R= ∠X ∠W ∠Y

Furkat [3]

The question is asking choose among the following choices that states the angle that is congruent to angle R if triangle RST is congruent to WXY, base on that, the possible answer would angle R is equals to angle W. I hope you are satisfied with my answer and feel free to ask for more

7 0

3 years ago

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