Pre Ap Geometry, the circled ones are the ones I need help with!

Answer:

27. x=7/20; 28. m= 3.7; 29. a= 5.8

30. x= 6; 31.x= 46

Step-by-step explanation:

27.

[tex]x + \frac{2}{3} = \frac{9}{ 10} [/tex]

you are going to carry the 2/3 over the equal sign. This will make the 2/3 negative so...

[tex]x = \frac{9}{10} - \frac{2}{3} [/tex]

now calculate it by finding the LCM of 10 and 3 ....this will be 30....you can just multiply the 10 and 3

now

30 into 10 goes 3 times....you will multiply this 3 with the 9 to get 27

30 into 3 goes 10 times...you will multiply this 10 with the 2 to get 20

[tex]x = \frac{27 - 20}{30}[/tex]

[tex]x = \frac{7}{30} [/tex]

Hopefully you understand

28.

[tex]1.2 = m - 2.5[/tex]

[tex]1.2 + 2.5 = m[/tex]

carry the 2.5 over the equal sign to get the m by itself...this is because you are trying to find m

when the negative number goes over the equal sign it will become positive...this is why you add it to the 1.2

m= 3.7

you can do the other on your own

the error in 30 is that the 7 should not be added to the 13 but subtracted

..this is because when you carry the positive number over the equal sign it will become negative..hence you subtract it

[tex]x + 7 = 13[/tex]

[tex]x = 13 - 7[/tex]

[tex]x = 6[/tex]

and for 31...the 12 should not be subtracted but added since when it goes over the equal sign it will become positive.

[tex]34= y - 12[/tex]

[tex]34 + 12 = y[/tex]

[tex]y = 46[/tex]

Answer:

The answer is b) 2(2x-4) and c)

Step-by-step explanation:

Okay lets try a) 2(2x-6)

2 x 2x - 2 x 6= 4x-12

b) 2(2x-4)

2 x 2x - 2 x 4=4x-8

c) : x-8+3x

x+3x-8=4x-8

Answer:

Try 11.25 miles

Step-by-step explanation:

Answer:

  (c)  y-2 = -4(x-3)

Step-by-step explanation:

The point-slope equation of a line is ...

  y -k = m(x -h) . . . . . . line through point (h, k) with slope m

For (h, k) = (3, 2), and m = -4, the equation of the line is ...

  y -2 = -4(x -3)

Answer:

1/2b - 5 (the third one)

Step-by-step explanation:

"Denni is five years less..."

this tells us we will need to be subtracting five, which knocks out the other answers.

"..one-half his brothers age."

since b represents the age of his brother, one half his brothers age is 1/2b  

That leaves us with 1/2b - 5

Answer:

Volume of a cylinder : πr^2h

: π = 22/7

: r = 9

: h = 20

: 22/7 × 9^2 × 20

: 5091.4 (corrected to 1.dp )

Answer:

  5089.4 cm³

Step-by-step explanation:

You want the volume of a cylinder with radius 9 cm and height 20 cm.

The volume of a cylinder is given by the formula ...

  V = πr²h

For r = 9 cm and h = 20 cm, the volume is ...

  V = π(9 cm)²(20 cm) = 1620π cm³

The value you get for this depends on the value you use for π. The attachment shows the three common choices: "π button", 3.14, 22/7.

Using the "pi button" value provided by a calculator, the volume is ...

  5089.4 cm³

<95141404393>

Answer: ur answer would be 27283

Step-by-step explanation:

Answer:

  right triangle

Step-by-step explanation:

I find it convenient to answer questions like this by computing a "form factor" that subtracts the square of the long side from the sum of the squares of the shorter sides. The sign of this value is the sign of the cosine of the largest angle in the triangle.

  f = a² +b² -c²

  f = 11.2² +21² -23.8²

  f = 125.44 +441 -566.44 = 0

The cosine of the largest angle is 0, so that angle is 90° and the triangle is a right triangle.

Three-dimensional objects

the outer diameter: 10 cm, r₁ = radius = 5 cm

the inner diameter: 9 cm, r₂ = 4.5 cm

volume of metal:

[tex]\tt =\dfrac{4}{3}\pi(r_1^3-r_2^3)\\\\=\dfrac{4}{3}\pi(5^3-4.5^3)\\\\=141.952\:cm^3[/tex]

Answer:

Step-by-step explanation:

A parallelogram has these characteristics that can be useful for answering this question:

__

Opposite sides are the same length: a parallelogram

__

Two isosceles triangles share a base segment. Not necessarily a parallelogram.

__

The diagonals bisect each other: a parallelogram

__

Opposite sides are parallel: a parallelogram. We know BD║AC from the converse of the alternate interior angles theorem. AB and CD are marked parallel.

Answer:

Here we have a problem with translations, where we define a translation as an operation that moves the graph of a function in a given direction.

We will see that the correct option is A.

"The graph of f is shifted 3 units up to create the graph of g."

To get this, we first need to describe vertical translations.

For a function f(x) we define a vertical translation (or vertical shift) of N units as:

g(x) = f(x) + N

If N is positive, the translation is upwards

if N is negative, the translation is downwards.

So here we have:

g(x) = f(x) + 3

So we can see that this is a translation of 3 units upwards, then the correct option is A, the graph of f(x) is shifted (or translated) 3 units up to greater the graph of g(x).

And the graphs of g(x) = x + 3 and f(x) = x can be seen below, where you can see this, where the grey line is g(x).

Step-by-step explanation:

Answer:

5 and 15

Step-by-step explanation:

15+5=20

5x4=20

Answer:

4-6 not sure where but around 4-6 maybe 5 pounds

Step-by-step explanation:

hope this helps

Answer:

Its 4.4 pounds.

Step-by-step explanation: To find the answer you would just divide the amount she spent and the price per pound.

====================================================

Explanation:

The set of given numbers sorts to this

11, 50, 72, 78, 80, 81, 85, 89, 94, 96, 97, 98

The majority or main cluster of the values are between 50 and 98. The outlier 11 is off on its own pretty far from the main cluster.

Let's find the mean of every value in this set. If you added up all the numbers, then you should get 931. Divide this over the number of values (12) and the mean of this set is roughly 931/12 = 77.5833

Now let's kick out the outlier 11. The 931 will drop to 931-11 = 920. Divide that new smaller sum over the 12-1 = 11 items left to get 920/11 = 83.6364 approximately.

--------------

To summarize so far:

We see that the mean has increased. This is because the outlier was pulling down on the mean to make it smaller than it should be. Once the outlier is out of the picture, the new mean will increase and better represent the center of the main cluster.

Answer:

try using a graphing calculator.

Step-by-step explanation:

I know this doesn't really answer your question, but it gets you closer to the answer. Just put your problem into go-ogle, and go-ogle should spit out a graph with the answers of x and y right on it.

Step-by-step explanation:

1. [tex]x+6 + 3x + 2 + 2x + 4[/tex]

Combine Like Terms:

Answer: [tex]6x+12[/tex]

G

2. [tex]6x + 4 + 7x + 1 + 5x + 7[/tex]

Combine Like Terms:

Answer: [tex]18x+12[/tex]

B

3. [tex]4x-3 + 3x + 5x - 6[/tex]

Combine Like Terms:

Answer: [tex]12x-9[/tex]

I

4. [tex]6x - 8 + 3x + 7 + 5x - 3[/tex]

Combine Like Terms:

Answer: [tex]14x-4[/tex]

H

Your code is, GBIH

Answer:

$620

Step-by-step explanation:

Answer:

4 (3)/(8) + 5(6)/(10)

Step-by-step explanation:

4 3/8= 35/8

5 6/10 = 28/5

= 9 39/40

Answer:

did yall ever find the answer

Step-by-step explanation:

Answer:

9

Step-by-step explanation:

The reason is from the triangle midsegment theorem in which the midsegment end up being half of the third side knowing that Rt is 18cm then VW is 9

Answer:

The unknown number is -5

Step-by-step explanation:

Let n represent the unknown number then...

3n=-15

Divide both sides by 3

(3n)/(3)=(-15)/(3)

n=-5

Answer: The possible numbers of fruit snacks that were in the bag  is x < 18

Step-by-step explanation: Good luck :D

Answer:

5330

------------

  73

Step-by-step explanation:

1- Transform the expression

2- Calculate

Answer:

The state itself is 50% of the total height.

Explanation:

Well, if the height including the base is 300 ft, that'd mean the total height of the statue itself is (300-150) ft = 150 ft.

Thus, it is (150/300)*100% = 50% of the total height.

Answer: the asnwer is 80 degrees

Step-by-step explanation:

Answer:

1:7 , 2:14, 4:28, 8:56

Step-by-step explanation:

Ratios act just like fractions, because of this, you can simplify ratios just as you would simplify a fraction. In addition, because they asked for the ratio of boys to girls, we know that they want the (number of boys): (number of girls)

HOPE THIS HELPS!!!

Answer:

Missing denominator = 36

Step-by-step explanation:

Let us assume that,

→ Missing denominator = x

Now we have to,

→ Find the required value of x.

Forming the equation,

→ 27/x = 3/4

Then the value of x will be,

→ 27/x = 3/4

→ 27 × 4 = 3 × x

→ 108 = 3x

→ 3x = 108

→ x = 108/3

→ [ x = 36 ]

Hence, the value of x is 36.

[tex]4(3x + 5) - 5(8x + 2) \\ 12x + 20 - 40x - 10 \\ 12 x - 40x + 20 - 10 \\ - 28x + 10[/tex]