I need help on this one

Answer: 27

Step-by-step explanation:

use the formula for the area of circle and solve for r: A=pi r^2

2290.221=pir^2 <---divide by pi

729=r^2 <--- square root both sides

27=r

Answer:

x = -1

Step-by-step explanation:

4/12 can be simplified to 1/3

1         x+2

---  = --------------

3          2x+5

Using cross products

1 ( 2x+5) = 3 (x+2)

Distribute

2x+5 = 3x+6

Subtract 2x from each side

2x+5-2x = 3x+6-2x

5 = x+6

Subtract 6 from each side

5-6 = x+6-6

-1 =x

Answer:

Step-by-step explanation:

Key skills: Proportions, One variable equations, Multiplication, Distribution Property

1) The best approach to this problem is with cross multiplication.

Cross multiplication is where we multiply the numerator of one fraction with the denominator of the other fraction, and the denominator of one fraction with the numerator of the other fraction.

2) Here we would do: 4(2x+5) and 12(x+2)

3) Since this is a proportion --> 4(2x+5) = 12(x+2)

4) Now, we use distribution property to expand both.

4(2x+5) --> 8x+ 20                      12(x+2) --> 12x+24

5) With simplifying we can solve for x:

If you plug in x=-1 back into the equation: 4/12= 1/3

4/12 does equal 1/3 so x= -1 is the right answer.

Hope you have a nice day and understood this problem explanation!! :D

Answer:

Its 31

Step-by-step explanation:

Just Use A Calculator

Answer:

in (x,y), it becomes (-x,y)

Step-by-step explanation:

Answer:

15 is the product of the digits of the number

Step-by-step explanation:

Let the two digit number be xy

Unit digit is 2 more than ten’s digit

y - x = 2 ••••••(i)

Secondly;

x + y = (10x + y) - 27 •••••(ii)

From i, y = x + 2

Put this into ii

x + x + 2 = 10x + x + 2 - 27

2x + 2 = 11x - 25

11x - 2x = 25 + 2

9x = 27

x = 27/9

x = 3

From above;

y = x + 2

y = 3 + 2 = 5

The product of the numbers xy will be 5 * 3 = 15

Answer:

Answer:

37.7m

Step-by-step explanation:

Triangle ABC is shown. DE is a straight line with D on AC and E on BC AB = 46m, EC = 18m, CD = 29m and ED = 20m. Calculate the length AD.

We solve using Similarity Theorem

BA/AC =BD/DC

46/AD+29 = 20/29

Cross Multiply

46 × 29 =20 (AD + 29)

1334 = 20AD + 580

20AD = 1334 - 580

20AD = 754

AD = 754/20

AD = 37.7m

Answer: 1,71572875

Step-by-step explanation: (4+2rad2)/3+2rad2

Answer:

6

Step-by-step explanation:

1/p = 1/(3 + 2sqrt2)

Multiplying by the conjugate (which you should pretty much always do to simplify), we get

(3-2sqrt2)/((3+2srqt)(3-2sqrt2))

which is

(3-2sqrt2)/(9-8) = 3-2sqrt2.

Therefore p + 1/p = 3+2sqrt2 + 3 - 2sqrt2 = 6

Answer:

200

Step-by-step explanation:

Answer:

x = 132°

Step-by-step explanation:

sum of total exterior angles = 360°

x + 147° + 81° = 360°

x + 228° = 360°

x = 360° - 228°

x = 132°

Answer:

10) The first 2 on the left are functions and the one on the top right is a function, but the bottom right is not.

11) Domain = (2, 8, -1, 0) Range = (5, -2, 4, 5)

Answer:

it's 7 divided by 10

transfer the 0 up and make it 0.7

The required solution of the given expression is a = 9 + b- c. Option A is correct.

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

Here,
Given expression
√a−b+c=3
Squaring both sides,
a - b + c = 9
Rearrange the equation in order of a,
a = 9 + b - c

Thus, the required solution of the given expression is a = 9 + b - c. Option A is correct.

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Answer:

Equation of line best fits the scatter plot is y = [tex]-\frac{30}{7} x + 108[/tex]

Step-by-step explanation:

Let the equation of line be y = mx + c

where m = slope of line and c is the intercept on y -axis

from the graph intercept on y-axis is 108

and the slope of line is given by m = [tex]\frac{y_2 - y_1}{x_2 - x_1}[/tex] where ([tex]x_2,y_2[/tex]) and ([tex]x_1,y_1[/tex]) is the points on line

let, points be (4,96) and (18,36)

on calculating this m = [tex]\frac{y_2 - y_1}{x_2 - x_1}[/tex] = [tex]-\frac{30}{7}[/tex]

Therefore equation of line best fits the scatter plot is y = [tex]-\frac{30}{7} x + 108[/tex]

9514 1404 393

Answer:

Step-by-step explanation:

The linear pair at G totals 180°, so we have ...

  x + 2x = 180

  3x = 180 . . . . . collect terms

  x = 180/3 . . . divide by 3

  x = 60

__

The total of angles in the triangle is 180°, so ...

  x + y + 70 = 180

  60 + y + 70 = 180 . . . . substitute for x

  y = 180 -130 . . . . . . . . . subtract 130

  y = 50

y=4

Step-by-step explanation:

cube root 64

Answer:

100/60×36

=$60 is what the first one will pay

=

Step-by-step explanation:

Answer:

12x+6y

Step-by-step explanation:

Step-by-step explanation:

Given:

7p - 6pc + 3c - 2

Find:

Number of terms

Coefficients

Constant terms

Computation:

Number of terms = 4

Coefficients = (7, -6, 3)

Constant terms = -2

Answer:

n - 8  = 20

Step-by-step explanation:

Answer:

7-(-1)

Step-by-step explanation:

Answer: Ur answer is B

Step-by-step explanation:

Answer:

1) positive 2)negative 3)negative

Step-by-step explanation:

i hope thats what your asking

Answer:

c [tex]\leq[/tex] -207

Step-by-step explanation:

Create an inequality and solve for c:

[tex]\frac{c}{9}[/tex] [tex]\leq[/tex] -23

Multiply by 9 on each side:

c [tex]\leq[/tex] -207 is the answer

Answer:

8.5g

Step-by-step explanation:

the mass decreased by 17%,so the decrease in mass 17% of 50g.17% of 50 = 0.17 × 50 =8.5 the mass decreased by 8.5g

The mass is decreased by [tex]8.5g[/tex].

What is the percentage?

A percentage is a number or ratio expressed as a fraction of [tex]100[/tex]. It is often denoted using the percent sign, "%".

Here given that,

A mass of [tex]50[/tex] g decreased by [tex]17[/tex] %.

So, in the mass [tex]17[/tex] % of [tex]50g[/tex] and of [tex]50g[/tex] is [tex]17[/tex] % is of the form:-

[tex]50=0.17[/tex] ×[tex]50=8.5[/tex]

Hence, the mass is decreased by [tex]8.5g[/tex].

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Answer:

From narrowest to widest:

1) [tex]8\cdot x^{2} + 2\cdot x +5[/tex]

2) [tex]5\cdot x^{2}-1[/tex]

3) [tex]2\cdot x^{2}+4[/tex]

4) [tex]\frac{2}{5}\cdot x^{2}+3\cdot x -5[/tex]

Step-by-step explanation:

The "width" of the quadratic function is determined by the value of the coefficient associated by the monomial of highest grade, with respect to the primitive of the quadratic function, represented by [tex]y = x^{2}[/tex], whose ruling coefficient is 1. If the ruling coefficient of the quadratic function is greater than  one, then the curve becomes narrower at the same time that the coefficient increases. Otherwise, if the ruling coefficient of the quadratic function is greater than zero and less than 1, then the curve becomes wider at the same time that the coefficient approximates to zero.

Based on this considerations, we proceed to list the quadratic functions from the narrowest to widest:

1) [tex]8\cdot x^{2} + 2\cdot x +5[/tex]

2) [tex]5\cdot x^{2}-1[/tex]

3) [tex]2\cdot x^{2}+4[/tex]

4) [tex]\frac{2}{5}\cdot x^{2}+3\cdot x -5[/tex]

Lastly, we include a graphic with all polynomials (tagged as 1, 2, 3, 4) in comparison primitive function (tagged as 0).

Answer: 42650

Step-by-step explanation:

The tens place is behind the ones place.

The number in the tens place in 42653 is 5.

So to round to the nearest tens you have to change three to 0 because if the number in the ones place is 5 or more, then the number in the tens place would be 1 higher than it used to be while the number in the ones place turns to 0.

However if the number in the ones place is less than 5, then that's the only thing that changes, the ones place would change into a '0.'

Hope that helped!

42650 is the value of the 426563 when rounded to the nearest ten.

The value a digit in a number represents based on where it is in the number is known as place value.

Given, the number 42653 which is rounded to the nearest ten value needs to find. Since,

The one's place is in front of the tens place.  In the number 42653, the tens place value is 5. The number three must be changed to 0 in order to round to the next tens because, if the number in the one's place is 5 or greater, the number in the ten's place would be 1 higher than it was previously while the number in the one's place would become 0. The one's place would change to a "0" if the number in the one's place is less than 5, but that is all that changes.

Therefore, When rounded to the nearest ten, 42650 represents the value of 426563.

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Answer:

I think it's b or c because a unit rate is a ratio which the two terms are in different units

Answer:

(-3.5 , 8)

Step-by-step explanation:

midpoint (x , y)

x = (-5 + -2) / 2 = -7/2 = -3.5

y = (9 + 7) / 2 = 16/2 = 8