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3 years ago

help asap im giving 27 points, dont guess and please help I tried getting help and everyones dissing me

Mathematics

2 answers:

finlep [7]3 years ago

4 0

Answer:

Q= 1,3

P= -3,0

R= 0,-1

Step-by-step explanation:

I have done this before

olga2289 [7]3 years ago

4 0

Answer:

P'= (-3,0) Q'= (1,3) R'= (0,-1)

Step-by-step explanation:

I moved each dot 4 units left and 2 units down. If I'm right brainliest pls, if not then flag the answer.

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A piece of wire of length 7070 is cut, and the resulting two pieces are formed to make a circle and a square. Where should the

lyudmila [28]

Answer:

a.x=39.2

b.Use whole wire as a circle

Step-by-step explanation:

We are given that

Length of piece of wire=70 units

Let length of wire used to make a square =x units

Length of wire used in circle=70- x

Side of square= $\frac{perimeter\;of\;square}{4}=\frac{x}{4}$

Circumference of circle= $2\pi r$

$70-x=2\pi r$

$r=\frac{70-x}{2\pi}$

Combined area of circle and square,A= $(\frac{x}{4})^2+\pi(\frac{70-x}{2\pi})^2$

Using the formula

Area of circle= $\pi r^2$

Area of square= $(side)^2$

a. $A=\frac{x^2}{16}+\frac{4900+x^2-140x}{4\pi}$

Differentiate w.r.t x

$\frac{dA}{dx}=\frac{x}{8}+\frac{2x-140}{4\pi}$

$\frac{dA}{dx}=0$

$\frac{x}{8}+\frac{2x-140}{4\pi}=0$

$\frac{\pi x+4x-280}{4\pi}=0$

$\pi x+4x-280=0$

$x(\pi+4)=280$

$x=\frac{280}{\pi+4}$

x=39.2

Again differentiate w.r.t x

$\frac{d^2A}{dx^2}=\frac{1}{8}+\frac{1}{2\pi}$ >0

Hence, the combined area of circle and the square is minimum at x=39.2

b.When the wire is not cut and whole wire used as a circle . Then, combined area is maximum.

3 0

3 years ago

which of the following statements is true? a. the radius of a circle is twice its diameter b. to find the diameter of a circle,

Bess [88]

Answer:

Statement B, C, E are correct

<u>Solution:</u>

We have to find the true statements

We know that,

To find the diameter of a circle, multiply its radius by two

Thus statement E is correct

Also,

To find the diameter of a circle, divide its circumference by π

Thus statement B is correct

circumference of a circle is obtained by multiplying diameter with pi

The circumference of a circle is greater than its diameter

Thus, Statement C is correct

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3 years ago

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satela [25.4K]

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2 years ago

Is 1 5/6 a rational number or a iraarational

gizmo_the_mogwai [7]

Answer: rational number

Step-by-step explanation:

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