McKenzie needs to practice clarinet for 10 hours this week. On the first day she practiced 1 1/2 hours. On the second day she practiced 1 1/4 hours. How many more hours does McKenzie need to practice?

9514 1404 393

Answer:

  C.  (-1, 2) and (4, 7)

Step-by-step explanation:

It may be simplest just to try the answer choices.

We notice that y = x+3 is not satisfied by the points in choices A or D, so those can be eliminated.

__

The second equation can be written in vertex form as ...

  y = (x -1)^2 -2

This equation is not satisfied by the points of choice B.

  Using (-1, 4) (from choice B), we get 4 = (-1-1)^2 -2 = 4-2 = 2 . . . FALSE.

However it is a good match for the points of choice C.

  Using (-1, 2) (from choice C), we get 2 = (-1-1)^2 -2 = 4 -2 = 2 . . . True

The appropriate choice is ...

  (-1, 2) and (4, 7)

Answer:

If a coin is tossed 12 times, the maximum probability of getting heads is 12. But, 12 coin tosses leads to 212 , i.e. 4096 number of possible sequences of heads & tails.

Step-by-step explanation:

Answer:

8/13

Step-by-step explanation:

Pam flips a coin 12 times. The coin lands on heads 8 times. What is the theoretical

probability of landing on heads on the next flip?

well it would be 8 and 13

Answer:

H. x - 8 ≤ 15 is correct I think.

Step-by-step explanation:

Have a nice day!

Answer:

53‾√

Step-by-step explanation:

give brainliest pls and thank you

Answer:

-18

Step-by-step explanation:

y=6x-3

6x-3=-18

-18=6x-3

Answer:

intercept: -3

slope: 6

Step-by-step explanation:

The number in the back and the operations are the y-intercept and the number multiplied by x is the slope.

Answer:

Step-by-step explanation:

4). Given functions are,

   [tex]f(x)=\frac{1}{3x}[/tex]

   For [tex]x=\frac{1}{12}[/tex]

   [tex]f(\frac{1}{12})=\frac{1}{3(\frac{1}{12})}[/tex]

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

             [tex]=1\times\frac{4}{1}[/tex]

             [tex]=4[/tex]

   [tex]g(x)=\frac{1}{x^2}[/tex]

   For [tex]x=\frac{1}{5}[/tex],

   [tex]g(\frac{1}{5})=\frac{1}{(\frac{1}{5})^2}[/tex]

           [tex]=\frac{1}{\frac{1}{25}}[/tex]

           [tex]=25[/tex]

  [tex]f(\frac{1}{12})-g(\frac{1}{5})=4-25[/tex]

                       [tex]=-21[/tex]

5). f(x) = -2x² + 3x - 8

    f(k + 4) = -2(k + 4)² + 3(k + 4) - 8

                = -2(k² + 8k + 16) + 3(k + 4) - 8

                = -2k² - 16k - 32 + 3k + 12 - 8

                = -2k² - 13k - 28

Answer:

C. 7

Step-by-step explanation:

8/4 =2

2^3 is 8

4+8=12

12-5=7

Hope this helps!

Answer:

Gretchen charges $12 dollars per hour

Step-by-step explanation:

$18/1.5=$12

Answer:

the second angle

sorry if wrong

Step-by-step explanation:

Answer:

189 components must be sampled.

Step-by-step explanation:

We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:

[tex]\alpha = \frac{1 - 0.99}{2} = 0.005[/tex]

Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].

That is z with a pvalue of [tex]1 - 0.005 = 0.995[/tex], so Z = 2.575.

Now, find the margin of error M as such

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

Assume that component lifetimes are normally distributed with population standard deviation of 16 hours.

This means that [tex]\sigma = 16[/tex]

How many components must be sampled so that a 99% confidence interval will have margin of error of 3 hours?

n components must be sampled.

n is found when M = 3. So

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

[tex]3 = 2.575\frac{16}{\sqrt{n}}[/tex]

[tex]3\sqrt{n} = 2.575*16[/tex]

[tex]\sqrt{n} = \frac{2.575*16}{3}[/tex]

[tex](\sqrt{n})^2 = (\frac{2.575*16}{3})^2[/tex]

[tex]n = 188.6[/tex]

Rounding up:

189 components must be sampled.

Answer:

I think it would be B.

Step-by-step explanation:

Since you aready have a 50% chance of landing on both heads or tails once. To land it on heads twice you would have a twenty five percent chance if you look at logic.  in which my dad would often say. Please mark the brainliest

Answer:

3 1/3 gallons

Step-by-step explanation:

Answer:

6m + 2n

Step-by-step explanation:

we have to added up the like therms

like therms are therms that have the same literal part

6m + 2n

Answer:

7m-m+4n-2n

m(7-1)+2n(2-1)

m(6)+2n(1)

6m+2n

Answer:

Actually, all of them!

Hope that helps! :)

-Aphrodite

Step-by-step explanation:

Answer:

area of a trapezoidal base  of each prism with heights  6 and 8 units are 4 square units and 3 square units respectively

Step-by-step explanation:

Let us first be aware of formula of volume for any regular geometrical figure.

Fundamental formula for  volume for any regular geometrical figure is.

volume = area of cross section of object*  height of object (A)

In the problem stated area of cross section of object will be  area of a trapezoidal base.

Given in the question is

Volume of both the trapezoidal prisms = 24 cubic units

*************************************************************************************

For prism with height 6 unit

Substituting the value of height and volume in formula for trapezoidal prisms

24 = 6 * area of a trapezoidal base

=> area of a trapezoidal base = 24/6 = 4 square units

*************************************************************************************

For prism with height 8 unit

Substituting the value of height and volume in formula for trapezoidal prisms

24 = 8 * area of a trapezoidal base

=> area of a trapezoidal base = 24/8 = 3 square units

*************************************************************************************

Therefore area of a trapezoidal base  of each prism with heights  6 and 8 units are 4 square units and 3 square units respectively.

Find the actual Dimensions of the triangle.

Multiply the size of the triangle on paper by 1.5 feet per inch:

Width = 5 x 1.5 = 7.5 feet.

Height= 7 x 1.5 =10.5 feet

Area of a triangle is 1/2 x base x height:

Area = 1/2 x 7.5 x 10.5 = 39.375 square feet.

Answer: 39.375 square feet.

The area of the actual banner is 39.375 feet²

Scaling is used to increase or decrease the size of a figure so as to create an image.

Given that 1 inch on the drawing Is equivalent to 1.5 feet on the actual banner, hence:

Base = 5 in * 1.5 feet per in = 7.5 feet

Height = 7 in * 1.5 feet per in = 10.5 feet

Area of the actual banner = (1/2) * 7.5 * 10.5 = 39.375 feet²

The area of the actual banner is 39.375 feet²

Find out more on scaling at: https://brainly.com/question/25324744

Answer:

[tex]f + e + d = 360^o[/tex]

Step-by-step explanation:

The question is incomplete, as what is required is not stated and the triangle is not given.

So, I will solve generally.

The proof is as follows (see attachment for triangle)

From the attachment, we have:

[tex]a + f = 180[/tex]

[tex]b + e = 180[/tex]

[tex]c + d = 180[/tex]

Make f, e and d the subject

[tex]f = 180 - a[/tex]

[tex]e = 180 - b[/tex]

[tex]d = 180 - c[/tex]

Add up the equations

[tex]f + e + d = 180 -a + 180 - b + 180- c[/tex]

Collect like terms

[tex]f + e + d = 180 + 180+ 180-a- b - c[/tex]

[tex]f + e + d = 540-a- b - c[/tex]

We have:

[tex]f + e + d = 540-(a+ b + c)[/tex]

[tex]a + b + c \to 180[/tex] --- angles in a triangle

So, we have:

[tex]f + e + d = 540-180[/tex]

[tex]f + e + d = 360^o[/tex] --- proved

Answer:

(-4, 16)

Step-by-step explanation:

Answer:

A. She will have $2 left over

Step-by-step explanation:

I know this because 3 yards of fabric cost $18 dollars so there would be $2 left

Answer:

Α. the change in prices of all goods and services over time

Step-by-step explanation:

sorry if I'm wrong

Answer:

L

Step-by-step explanation:

The first number is always x-coordinate. And amongst all only J and L has positive x-coordinates. With J y-coordinate is also positive so it should be L

Answer:

slope=-9/2

y int- 6

Step-by-step explanation:

okay lets take two points

-2,15 and -6,33

the slope is 33-15/ -6-(-2)= 18/-4=-9/2

equation is y=mx+b where m is slope and b is y intercept

so plugging values in we get

15=-2(-9/2)+b

15=9+b

b=6

Answer: A=144

Step-by-step explanation:

A=a^2=12^2=144 I hope this helps sorry if it doesn't. :)  

Answer: 6396

Step-by-step explanation:

Delta math

Answer:

≠

Step-by-step explanation:

Sorry I just need 20 Characters

Answer:

≠

Step-by-step explanation:

Because 3/8 is 0.375, 8/15 is 0.53( with the 3 repeated). The decimal values aren't the same so the answer is that these 2 fractions are not equivalent.

Answer:

letter corresponds to the base=b

letter corresponds to the slant height=s

letter corresponds to the height=,h