please help thank you

Well knowing that around

at age 40 giving birth to a child with down syndrome is about 46% or 47%

but at age 45 I'm pretty sure it's 3%

Hope this helps!

Answer:

12

Step-by-step explanation:

Perimeter is using addition and if its a square, all of the sides are the same.

If one side = 3 cm, then 3cm + 3cm + 3cm + 3cm=12 cm

Answer:

12

Step-by-step explanation:

A square with 3cm long side

Area = 2 sides multiplied

Perimeter = All sides added

3 + 3 + 3 + 3 = 12cm

or

3 × 4 = 12cm

Answer:

See photo below

I hope this helps!

Answer:

2.5 minutes per question

Step-by-step explanation:

90 mins/ 36 questions equals 2.5 mins per question

Answer:

a = 3

Step-by-step explanation:

Here you can use the cross multiplication strategy or whatever it's called. That's where you multiply the diagonals together. Its kinda long to explain, but you can google it for details.

In either case, you get the following equation:

8(2a-1) = 4(a+7)

Open the parenthesis

16a - 8 = 4a + 28

Subtract 4a from both sides

12a - 8 = 28

Add 8 to both sides

12a = 36

Divide both sides by 12

a = 3

Sorry for weird formatting I'm on an ipad.

Answer:

Your answer is: A = 3

Solve for  a  by cross multiplying.

Step-by-step explanation:

Hope this helped : )

87

Step-by-step explanation:

the picture is upsidedown

Step-by-step explanation:

use the respective formula and solve according to the image

Step-by-step explanation:

The Rotation of a point through 180°, about the origin when a point M (h, k) is rotated about the origin O through 180° in anticlockwise or clockwise direction, it takes the new position M' (-h, -k). ...I think.. Hope it is right...;3

Answer:

180 Degree Rotation

When rotating a point 180 degrees counterclockwise about the origin our point A(x,y) becomes A'(-x,-y).

Step-by-step explanation:

Answer: 4000

Step-by-step explanation:

If for example 5 is 1% of what number, you would multiply that by 100/1 and multiply that by 5.

For 36 is 0.9% of what number, you would multiply the 36 by 100/0.9 and multiply that by 36.

100/0.9 is 111.11 and 111.11 x 36 is 4000, so 4000 would be your answer.

Answer:

The custodian will be able to repaint 7 bookcases with the amount of paint.

Step-by-step explanation:

The custodian  has  5 1/4 gallons of  paint, to find the number of bookcases the custodian will be able to repaint with this amount of paint if each bookcase requires 3/4 gallons, then we will simply divide 5 1/4 by 3/4 to give  us the number.

But first we need to change 5 1/4 to improper fraction,

thus; 5 1/4 =  

5 1/4 ÷3/4   =   ÷

(We will want to change the division sign to multiplication, to do that, we will have to take the inverse of 3/4 which is 4/3 hence;

                   = ×

4 will cancel out 4 hence;

                    =

                    = 7

Therefore the custodian will be able to repaint 7 bookcases with the amount of paint.

Answer:

scale factor = 4

Step-by-step explanation:

The scale factor is the ratio of OA' to OA , that is

scale factor = [tex]\frac{OA'}{OA}[/tex] = [tex]\frac{3+9}{3}[/tex] = [tex]\frac{12}{3}[/tex] = 4

Answer:

Step-by-step explanation:

Which ways?

Answer:

Subtract 3

Step-by-step explanation:

The first operation that should be done first in the expression 5x + 3 = 28 is subtracting 3 from both sides.

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

Given, 5x + 3 = 28.

The first operation that should be done first is subtracting 3 to both the side of the equation to separate the variable x and the constant term.

∴ 5x + 3 - 3 = 28 - 3.

5x = 25.

x = 5.

learn more about numerical expression here :

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Answer:

Your answer is 27

Step-by-step explanation:

4 x 3 = 12

5 x 3 = 15

12 + 15 = 27

Answer:

Skewed left

Step-by-step explanation:

The outlier extends the curve making it skewed left is what i think

Answer:

1.95

Step-by-step explanation:

Answer:

x = 1

Step-by-step explanation:

...................

Answer:

1

Step-by-step explanation:

Step 1:

3x + 11 = 5x + 9     Sum of a line

Step 2:

11 = 2x + 9      Subtract 3x on both sides

Step 3:

2 = 2x      Subtract 9 on both sides

Answer:

x = 1        Divide

Hope This Helps :)

Answer:

41.5

23.5

Step-by-step explanation:

Let's start by calling the two numbers we are looking for x and y.

The sum of x and y is 65. In other words, x plus y equals 65 and can be written as equation A:

x + y = 65

The difference between x and y is -18. In other words, x minus y equals -18 and can be written as equation B:

x - y = -18

Now solve equation B for x to get the revised equation B:

x = -18 + y

Then substitute x in equation A from the revised equation B and then solve for y:

x + y = 65

-18+y+y=65

-18 + 2y = 65

2y = 83

y = 41.5

Now we know y is 41.5. Which means that we can substitute y for 41.5 in equation A and solve for x:

x + y = 65

x + 41.5= 65

X = 23.5

DIfference : 23.5 - 41.5 = 18

Sum: 41.5 +23.5 = 65

Hence, The two number are 23.5 and 41.5

[RevyBreeze]

Answer:

Add the square of half of the coefficient of [tex]x[/tex] to both sides

[tex]\left(-\dfrac92\right)^2=\dfrac{81}{4}[/tex]

Completing the square:

Rewrite  [tex]x^2-9x+2=0[/tex]  in the form  [tex]y=(x-b)^2 +c[/tex]

Add the square of half of the coefficient of [tex]x[/tex] to both sides:

[tex]\implies x^2-9x+2+\left(-\dfrac92\right)^2=\left(-\dfrac92\right)^2[/tex]

[tex]\implies x^2-9x+2+\dfrac{81}{4}=\dfrac{81}{4}[/tex]

[tex]\implies\left(x-\dfrac92\right)^2 +2=\dfrac{81}{4}[/tex]

[tex]\implies\left(x-\dfrac92\right)^2 +2-\dfrac{81}{4}=0[/tex]

[tex]\implies\left(x-\dfrac92\right)^2 -\dfrac{73}{4}=0[/tex]

[tex]\implies\left(x-\dfrac92\right)^2 -\dfrac{73}{4}=0[/tex]

it's C since it also has 4 elements

Answer:

its the second one

Step-by-step explanation:

The volume of the rectangular prism will be  [tex]V=1.26m^{3}[/tex]

Given that

[tex]\rm Lenth \ of \ the \ rectangular \ prism =1.4\ m[/tex]

[tex]\rm width\ of \ prism=0.5\ m[/tex]

[tex]\rm Height \ of \ prism=1.8\ m[/tex]

[tex]\rm Volume \ of \ the \ Rectangular \ Prism= L\times W\times H[/tex]

[tex]V=1.4\times 0.5\times1.8=1.26 \ m^{3}[/tex]

Thus the volume of the rectangular prism will be  [tex]V=1.26m^{3}[/tex]

To know more about the volume of the rectangular prism follow

https://brainly.com/question/24284033

Answer:

irrational numbers

pi belongs to the set of irrational numbers

Answer:

a) [tex]a_{n}[/tex] = 13.8 + 0.2n

Step-by-step explanation:

Given :-

a = 14

d = 0.2

To Find :

[tex]a_{n}[/tex]

Solving :-

[tex]a_{n}[/tex] = a + (n - 1)d

[tex]a_{n}[/tex] = 14 + 0.2n - 0.2

[tex]a_{n}[/tex] = 0.2n + 13.8

Solution :-

a) [tex]a_{n}[/tex] = 13.8 + 0.2n

Answer:

- [tex]\frac{1}{4}[/tex]

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Given

4x - y = 9 ( subtract 4x from both sides )

- y = - 4x + 9 ( multiply through by - 1 )

y = 4x - 9 ← in slope- intercept form

with slope m = 4

Given a line with slope m then the slope of a line perpendicular to it is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{4}[/tex]

Answer:

94% not sandy beach

1.8km is sandy beach

Step-by-step explanation:

30 = 100%

÷ 100 both sides

0.3 = 1%

× 6 both sides

1.8 = 6%

The side lengths that make the area of rectangles as modelled are -

{ 1 } - (x + 2)

{ 2 } - (x - 5)

{ 3 } - (x + 3)

{ 4 } - (x - 1)

A function is a elation between a dependent and independent variable.

Given is to identify the correct side lengths of the figures.

We can write the side lengths as -

{ 1 } - (x + 2)

{ 2 } - (x - 5)

{ 3 } - (x + 3)

{ 4 } - (x - 1)

Therefore, the side lengths that make the area of rectangles as modelled are -

{ 1 } - (x + 2)

{ 2 } - (x - 5)

{ 3 } - (x + 3)

{ 4 } - (x - 1)

To solve more questions on functions, visit the link-

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Answer with step-by-step explanation:

m = 0.8

Firstly, we have to see how many M's we are dividing. On the image, it shows 2m + 2m + m + m = 6m. Then, we divide 6 by 4.8, since is would give us the correct value of m. 4.8 ÷ 6 = 0.8.

Hope this was helpful! (brainliest please)

Answer:

i

I hope this helps!