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3 years ago

12

Which is a perfect square? o 20 21 ооо

2 answers:

Sergio [31]3 years ago

7 0

Is 20 a perfect square number? A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 20 is about 4.472. Thus, the square root of 20 is not an integer, and therefore 20 is not a square number.

A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 21 is about 4.583. Thus, the square root of 21 is not an integer, and therefore 21 is not a square number.

Therefore neither one is a perfect square.

rusak2 [61]3 years ago

5 0

It is 20 because the would be five on each side

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3. Given that ∆RSV - ∆RTU, find the coordinates of S and the scale factor. R(0, 0) T(16,0) V(0, --6) U(0, -8)

MArishka [77]

Answer:

I'll give the scale factor and you can compute the coordinates of S

Step-by-step explanation:

the dilation if centered about the origin is the scale factor multiplied by each coordinate.

so looking at points V and U, the scale factor F is found by solving for F:

-6xF= -8

F=8/6=4/3

Now you can compute the coordinates for S

send a comment if you need help

5 0

3 years ago

Derive the equation of the parabola with a focus at (−5, 5) and a directrix of y = −1.

marusya05 [52]

Answer: The equation of parabola is $(x+5)^2=12(y-2)$ .

Explanation:

It is given that the focus of the parabola is (−5, 5) and a directrix of y = −1.

The standard form of a parabola is,

$(x-h)^2=4p(y-k)$

Where, (h,k+p) is the focus and y=k-p is the directrix.

It is given that the focus of the parabola is (−5, 5).

$(h,k+p)=(-5,5)$

On comparing both sides we get,

$h=-5$

$k+p=5$ .... (1)

The directrix of y = −1.

$k-p=-1$ .... (2)

Add equation (1) and (2),

$2k=4$

$k=2$

Put this in equation (1),

$p=3$

Put p=3, k=2 and h=-5 in standard equation of parabola.

$(x-(-5))^2=4(3)(y-2)$

$(x+5)^2=12(y-2)$

Therefore, the equation of parabola is $(x+5)^2=12(y-2)$ .

7 0

3 years ago

Read 2 more answers

What is the equation of the following line? Be sure to scroll down first to see

Brut [27]

Answer:

C

Step-by-step explanation:

The equation of a line passing through the origin is

y = mx ( m is the slope )

Calculate m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (0, 0) and (x₂, y₂ ) = (- 3, 1) ← 2 points on the line

m = $\frac{1-0}{-3-0}$ = - $\frac{1}{3}$

y = - $\frac{1}{3}$ x ← equation of line

4 0

3 years ago

Help solve please!!!!

faust18 [17]

g=23/16.

<u>Step-by-step explanation:</u>

3/16=(-5/4)+g

g =3/16+5/4

g =3/16+20/16

g =23/16

It is a simple LCM process, by taking g in LHS and other value in RHS.

Hence By soving RHS We can easily find the value of g.

7 0

3 years ago

Jill read 9 pages. Sam read 3 times as many pages as Jill. How many pages did both Jill and Sam read?

Nataly [62]

Answer:

Together, Jill and Sam read 36 pages.

Step-by-step explanation:

9 + (9 * 3)

9 + 27

36

4 0

3 years ago

Read 2 more answers