Need help pre college

Answer:

The monthly amount of water used per household in a small community is normally distributed with mean 7,069 gallons and standard deviation 58 gallons. Find the three quartiles for the amount of water used.

Answer:

5:20 to 9:20

Step-by-step explanation:

Answer:

5 watts

Step-by-step explanation:

Answer:

D.) $40.50

Step-by-step explanation:

If he is having 72 guests over, then he'll need nine tables.

(72 guests divided by eight guests, [each table] equals the need for nine tables)

If each table is $4.50 and he needs nine tables then we shall multiply nine by 4.50

9 x 4.50 = 40.50

$40.50

Hope this helped! Please mark brainliest!

Answer:

240 sq feet

Step-by-step explanation:

for a rectangle

area = length * width

a = 20 * 12

a = 240

240 sq feet

Answer:

The numbers are best written as,  

                        (1.2 x 10⁻²)(3.65 x 10⁸)

If we multiply the bases of the scientific notations, we get an answer of 4.38. There exists a rule which states that for exponents of the same number which are multiplied, we add up the exponents. Thus, our final answer would be,

                              4.38 x 10⁶

Step-by-step explanation:

Step-by-step explanation:

= 20/3 ÷ 1/6

= 20/3 × 6

= 120/3

= 40

Answer:

[tex] \sf 40[/tex]

Step-by-step explanation:

[tex] \sf = \frac{20}{3} \div \frac{1}{6} [/tex]

[tex] \sf = \frac{20}{3} \times \frac{6}{1} [/tex]

[tex] \sf = \frac{20 \times 6}{3 \times 1} [/tex]

[tex] \sf = \frac{120}{3} [/tex]

[tex] \sf = 40[/tex]

9514 1404 393

Answer:

  x = -8 or 2

Step-by-step explanation:

Compare your equation to the standard form equation.

  -x^2 -6x +16 = 0 . . . . . . your equation

  ax^2 +bx +c = 0 . . . . . . standard form equation

Identify the values of 'a', 'b', and 'c'.

  a = -1

  b = -6

  c = 16

Fill in these values in the quadratic formula and do the arithmetic.

  [tex]x = \dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\x=\dfrac{-(-6)\pm\sqrt{(-6)^2-4(-1)(16)}}{2(-1)}=\dfrac{6\pm\sqrt{100}}{-2}\\\\x=-3\pm5=\{-8,2\}[/tex]

The solutions are x = -8 and x = 2.

Answer:

B 20in

Step-by-step explanation:

e2021

Answer: Estimate the length of each line segment in inches. Then  

measure it to the nearest —

1

2

— inch.

2.

Estimate: Actual:  

Estimate the length of each line segment. Then  

measure it to the nearest —

1

4

— inch.

3.

Estimate: Actual:  

4.

Estimate: Actual:  

Draw a line segment that has the given length.

5. 4 inches

6. 3—1

4

— inches

7. 4—

1

2

— inches

8. —3

4

— inch

9. Marta wants to make 4 necklaces that are the same  

length. She asks her friends to cut the string for the  

necklaces 15 paper clips long. Would all the  

lengths be the same? Explain your thinking.  

Answers will  

vary.

Answers will  

vary.

Answers will  

vary.

3 inches

2—

1

2

— inche

Step-by-step explanation:

Answer:

0.036 or 3.6%

Step-by-step explanation:

First you must set up the equation:

(|14.5 - 14|) / 14

0.5 / 14

0.036 x 100%

3.6%

Another Problem For Help With More Explanation:

Mathew goes to the store and gets 10 bananas, which he expects to be 4.1 pounds, however it turned out the actual weight was 3.9 pounds. What was the percent error of the measurement, to the neartest tenth of a percent?

So first you must take the 2 values you need out, which would be 4.1 pounds (the expected value) and 3.9 pounds (the actual value).

You then must set up the equation which is (|X-Y|)/Y.

X is the actual value, which would be 3.9 pounds and Y is the expected value, which would be 4.1.

You then plugin the numbers so you get (|3.9-4.1|) / 4.1.

Then follow PEMDAS, which would be the parantheses, so it would be |-0.2| / 4.1.

The absolute value of -0.2 is 0.2, since the absolute value makes it positive, no matter if it was already negative or positive.

You are then left with 0.2 / 4.1, which you then do the math for, with it equaling 0.048780.

You then do 0.048780 x 100%, to get the percent, which would be 4.8780%, however you would just need to round to the tenth of a percent, so it would be 4.9%. Hope this extra problem helps you understand the topic more! :}

Answer:

3/5

Step-by-step explanation:

1/2 ÷ 5/6 = 1/2 × 6/5 = 6/10 = 3/5

The amount of Moon we see changes over the month — lunar phases — because the Moon orbits Earth and Earth orbits the Sun. Everything is moving. During a lunar eclipse, Earth comes between the Sun and the Moon, blocking the sunlight falling on the Moon.

Answer:

Both 'The Moon is illuminated on one side by the Sun' and 'The Moon's position relative to Earth results in phases.'

Step-by-step explanation:
The Moon has phases because of its position relative to Earth, and also because it is only illuminated on one side by the Sun. As it rotates, some parts of the moon reflects the Sun's light, so it looks as if it's changing shape. The other parts that are blacked out is because it is not reflecting the Sun's light, not because of the Earth.

Answer:

see below

Step-by-step explanation:

We can use the equation

y = -a f(-b (x-h)) +k

The first negative is a reflection about the x axis

a is a horizontal stretch if it is >1 or a compression if less than 1

The negative inside the function is a reflection about the y axis

b is a horizontal compression if >1 or a compression if less than 1

h shifts the function left ( h<0) or right if (h>0)

k shifts the function up if k>0 or down if k <0

4. y = -1/3 | x - 2 | - 4

parent function |x|

    reflection about the x axis

1/3 horizontal compression

shift 2 units to the right

4 units down

y = 1 / ( x + 5) - 3

The parent function is 1/x

shift is 5 units to the left and 3 units down

6. (x - 1)^2 + (y + 2)^2 = 4

(x - 1)^2 + (y + 2)^2 = 2^2

This is a circle of radius 2

The center is shifted from the origin 1 unit to the right and 2 units down

The difference of given expressions is 6x+14.

To subtract an algebraic expression from another, we should change the signs (from '+' to '-' or from '-' to '+') of all the terms of the expression which is to be subtracted and then the two expressions are added.

Given that, 8(x+3)-2(x+5)

8x+24-2x-10 (By distributive property of multiplication)

(8x-2x)+(24-10) (Grouping like terms)

6x+14

Therefore, the difference of given expressions is 6x+14.

To learn more about the subtraction of expression visit:

https://brainly.com/question/12959016.

#SPJ2

Answer:

[tex]\bf\mathsf{X-intercept=(\frac{25}{3},\:0)}[/tex]

Y-intercept = (0, -5)

Step-by-step explanation:

Given the linear equation in standard form,  3x - 5y = 25, for which we must determine its x- and y-intercepts.

It is essential to understand what the intercepts mean relative to the given equation and its location on the graph.

The x-intercept is the point where the graph crosses the x-axis. Hence, its coordinates are often represented by (a, 0). Thus, the x-intercept provide the value of x when the value of the y-coordinate is 0.

Now, we can solve the x-intercept by setting y = 0:

3x - 5y = 25

3x - 5(0) = 25

3x - 0 = 25

3x = 25

Divide both sides by 3 to solve for x:

[tex]\large\mathsf{\frac{3x}{3}\:=\:\frac{25}{3}}[/tex]

[tex]\bf\mathsf{x=\:\frac{25}{3}}[/tex]

Therefore, [tex]\bf\mathsf{X-intercept=(\frac{25}{3},\:0)}[/tex] .

The y-intercept is the point where the graph crosses the y-axis. Hence, its coordinates are often represented by (0, b ). Thus, the y-intercept provide the value of y when the value of the x-coordinate is 0.

Now, we can solve the y-intercept by setting x = 0:

3x - 5y = 25

3(0) - 5y = 25

0 - 5y = 25

-5y = 25

Divide both sides by -5 to solve for y:

[tex]\large\mathsf{\frac{-5y}{-5}\:=\:\frac{25}{-5}}[/tex]

y = -5

Therefore, the y-intercept is (0, -5).

Answer:

i think its 96

Step-by-step explanation:

Answer:

The small cart has a momentum of 0.6 kg ⋅ m/s and the large cart has a momentum of 0 kg ⋅ m/s

I just took the test.

Answer:

19, 23, 27, 31, 35, 39, 43, 47

Step-by-step explanation:

is this what you meant? if not tell me what you meant and I'll change it

Answer:

Step-by-step explanation:

y = 1 is a horizontal line

Vertex is halfway between the directrix and focus on a vertical line through x = (-5, 3).

(1 + 3)/2 = (-5, 2)

The shortest distance from the directrix to the focus is 3 - 1 = 2 units

so points (-5 - 2, 3) = (-7, 3) and  (-5 + 2, 3) = (-3, 3) are on the parabola.

The vertex form of a parabola is

y = a(x - h)² + k

y = a(x - (-5))² + 2

y = a(x + 5)² + 2

plugging in one of the other known points

3 = a(-7 + 5)² + 2      or      3 = a(-3 + 5)² + 2  

1 = a(-2)²                             1 = a(2)²

a = 1/4                                 a = 1/4

y = ¼(x + 5)² + 2

to find the standard form, expand the vertex form

y = ¼(x² + 10x + 25) + 2

y = 0.25x² + 2.5x + 6.25 + 2

y = 0.25x² + 2.5x + 8.25

or

4y = x² + 10x + 33

Step-by-step explanation:

The power 2 after 4.05 means that 4.05 should times itself twice, which means

[tex] {4.05}^{2} = (4.05)(4.05) \\ = 16.4025[/tex]

Answer:

-3/7

Step-by-step explanation:

Ty for points

Answer:

0.002+0.05+0.5+9+50+100

Answer:

it’s still 42 centimeters :3

Step-by-step explanation:

this is kind of a trick question. These are transformations that don’t change the shape‘s size such as rotations and translations. Dialations change the shapes size but because in this problem it’s on reflections and translations, you can easily say that the perimeter is still 42 centimeters.

hope this helped :3

:3 byeeeeeeeeeeee

Answer:

f(x)=-x-3

Step-by-step explanation:

reflection in the x-axis

f(x) = x ---> f(x) = -x

translation 3 units down:

f(x) = -x ---> f(x) = -x - 3

Answer:

x=0 and x=2

Step-by-step explanation:

[tex]\frac{x}{5} = \frac{x^{2}}{4x+2}[/tex]

4x+2 can't equal 0, is 4x+2=0, then x=-1/2, none of the answers are -1/2 so none are extraneous

x=0 is a solution, but x=-2 isn't, x=2 works (i checked this by plugging the solutions into the equation

Answer:

(C) x = 0 and x = 2

Answer:

Her homework has 99 problems

Step-by-step explanation:

27÷3=9

9=1/11

11×9=99

now, if we take into account that a WHOLE is always one, and we can partition it in many ways, say 295/295 = 1, or 313/313 = 1, so the whole amount of homework is 1 fraction wise, thus

[tex]\begin{array}{ccll}amount&fraction\\\cline{1-2}27&\frac{3}{11}\\x&1\end{array}\implies \cfrac{27}{x}=\cfrac{\frac{3}{11}}{~~1~~}\implies \cfrac{27}{x}=\cfrac{3}{11}\implies 27\cdot 11=x\cdot 3\\\\\\297=3x\implies \cfrac{297}{3}=x\implies \boxed{99=x}[/tex]

Answer: 7,035

Step-by-step explanation: first convert 5% to a decimal, 0.05

Then multiply that to the subtotal which is 6,700: 335

Last add 335 to the subtotal. 6,700+335+7,035

Hope this helps!

it is 24x² - 90x + 84

Step-by-step explanation:

it cuz I'm smart lolz

Answer:

6(x-2) x (4x-7)

Step-by-step explanation:

the pictures attached have the working there