a plumber charges $25 per hour on weekdays and $40 per hour on weekends. The plumber billed a total of 190 hours, worth a total of $5275. Let x represent the number of weekend hours worked, and write algebraic expressions for each of parts a-c below

Step-by-step explanation:

2c+10=30

2c+10−10=30−10

2c=20

2c÷2=20÷2

Answer: c=10

Answer:

10

Step-by-step explanation:

2c + 10 = 30

so we take 10 to the other side to become - 10.

Therefore 2c = 30 - 10

= 20

Divide both sides by the coefficient of c that's 2

2c = 20

c = 10

Answer:

4506.4369

Step-by-step explanation:

welcome

Answer:

80 units ^2

Step-by-step explanation:

The semicircle that is added on to the rectangle can be translated to fit into the slot where a semicircle has been removed (both semicircles are congruent as they have the same diameter). This leaves us with a plain rectangle, with area b * h, or 8 * 10, or 80.

Answer:

0.5 seconds (at 100 feet in the air).

Step-by-step explanation:

So, the height of the ball can be modeled by the function:

[tex]h(t)=-16t^2+16t+96[/tex]

Where h(t) represents the height in feet after t seconds.

And we want to find its maximum height.

Notice that our function is a quadratic.

Therefore, the maximum height will occur at the vertex of our function.

The vertex of a quadratic function in standard form is given by the formula:

[tex](-\frac{b}{2a}, f(-\frac{b}{2a}))[/tex]

In our function, a=-16; b=16; and c=96.

Find the x-coordinate of the vertex:

[tex]x=-\frac{(16)}{2(-16)}=1/2[/tex]

So, the ball reaches its maximum height after 0.5 seconds of its projection.

Notes:

To find it’s maximum height, we can substitute 1/2 for our function and evaluate. So:

[tex]h(1/2)=-16(1/2)^2+16(1/2)+96[/tex]

Evaluate:

[tex]h(1/2)=-4+8+96=100[/tex]

So, the ball reaches its maximum height of 100 feet 0.5 seconds after its projection.

Answer:

y=1.19x-4.3

Step-by-step explanation:

I did the math

Answer:

just here to steal some old points! sorry and thanks

Step-by-step explanation:

Answer:

The answer would be $40.

Step-by-step explanation:

You take the first 25% off and add it to the other 25% off, which would equal 50% off. After that you take 50% off for $80, which would be $40 because half of $80 is $40.

It's the first one I believe

Answer:

At midnight, the temperature was 43.7 degrees above 0, and in the morning, it was 3.6 degrees below 0

Step-by-step explanation:

At midnight, the temperature was 43.7°F. In the morning, the temperature was −3.6°F.

We can say that −3.6 lie on the LHS of a number line while 43.7 lie on RHS of the number line and 0 at the mid.

43.7°F is above 0 and 3.6°F is below 0.

At midnight, the temperature was 43.7 degrees above 0, and in the morning, it was 3.6 degrees below 0 . Hence, the correct option is (d).

I'm not really sure what the question is here, because you just gave a statement... but if you are trying to get an expression from words, here is what it would be:

A = 10N

I'm also not sure if "a number" is equal to the same as "a number" at the end, but I'm guessing not. If it is though, and you're trying to find the value of A, the answer would be:

A = 10

*Please provide the question you are asking here, not just statements, next time, so that people can help you.

I hope this helped :)

Answer:

1,280

Step-by-step explanation:

prob(spots) = 12/180 = 1/15

so of the 1200 frogs, (1/15)(1200) should have spots, so ..

how many should not have frogs ?

or

prob(not spots) = 14/15

number who don't have spots = (14/15)(1200) = 1,280

Answer:

C. 0.98

Step-by-step explanation:

Let x be the mean of Company A and B annual profit and x/2 and y are standard deviation of Company A and B annual profit.

P(B<0) = 0.9*P(A<0)

P(Z<(0-x)/y) = 0.9*P(Z<(0-x)/(x/2))

P(Z<-x/y) = 0.9*P(Z<-2)

P(Z<-x/y) = 0.0205

x/y =2.04

Or y/x = 1 /2.05

y/x =0.49

Ratio of the standard deviation of company B annual profit to the standard deviation of company A annual profit =y/(x/2)

= 2*(y/x)

= 2*0.49

= 0.98

Answer:

A. f(x) = 2x2

Step-by-step explanation:

Answer:

Associative property

Step-by-step explanation:

Given

½ + ⅔ + 3/2

Required

What reason supports Winona's process?

This question could be better answered, if supported with options; however, since there's none, I'll provide my answer on a general rule.

Winona's process can be supported by associative property of algebra which implies that

a + b + c = (a + b) + c = a + (b + c) = (a + c) + b

So, when Winona added ½ to 3/2, it is represented by a + c

And when she added the result to ⅔, it is represented by (a + c) + b

Hence, we can conclude that Winona applied associative property

Answer:

{x|xeU and x has a negative square root}

Step-by-step explanation:

Answer:

(B.) {x|x ∈ U and x has a negative square root}

Step-by-step explanation:

its right on edge 2020

Answer:

Where is the figure??

..

Answer:

What do you mean?

Step-by-step explanation:

You only stated a couple of words with no image or anything, please let me know so I can help properly

Answer:

No idea what your saying

Step-by-step explanation:

Answer: 39

Step-by-step explanation: its very confusing so forgive me if im wrong

Answer:

P_he = 562.5 mmHg

P_ne = 1068.75 mmHg

P_ar = 618.75 mmHg

Step-by-step explanation:

Formula for partial pressure is;

Partial pressure = mole fraction × total pressure

Mole fraction of Helium(He); x_he= 1/(1 + 1.9 + 1.1) = 1/4 = 0.25

Mole fraction of Neon(Ne); x_ne = 1.9/(1 + 1.9 + 1.1) = 1.9/4 = 0.475

Mole fraction of argon; x_ar = 1.1/(1 + 1.9 + 1.1) = 1.1/4 = 0.275

Thus;

Partial pressure of He;

P_he = 0.25 × 2250

P_he = 562.5 mmHg

Partial pressure of Ne;

P_ne = 0.475 × 2250

P_ne = 1068.75 mmHg

Partial pressure of Ar;

P_ar = 0.275 × 2250

P_ar = 618.75 mmHg

Answer:

2

0.9

Step-by-step explanation:

The average age of the lizards will be 2 and the standard deviation is 0.81.

Average is defined as the ratio of the sum of the number of the data sets to the total number of the data. The standard deviation is a statistic that expresses how much variation or dispersion there is in a set of values.

Given that the lizards were randomly selected from the 36 lizards at your local zoo: 1, 2, 2, 1, 3, 3

The average will be calculated as:-

Average = Sum of the data / Number of the data

Average = ( 1 + 2 + 1 + 3 + 3 ) / 6 = 12 / 6 = 2

The standard deviation will be calculated as:-

[tex]\rm \sigma=\sqrt{\dfrac{\sum(x-\mu)^2}{N}}\\\\\sigma=\sqrt{\dfrac{(1-2)^2+(2-2)^2+(1-2)^2+(3-2)^2+(3-2)^2}6[/tex]

[tex]\sigma[/tex] = 0.81

Therefore, the average age of the lizards will be 2 and the standard deviation is 0.81.

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Answer:

a) E = I(R+r)

b) r = (E/I) - R

Step-by-step explanation:

Answer:

s = independent variable, P(s) = dependent variable

Step-by-step explanation:

s = discrete because you need a certain value for shirts. For instance, 1,2,3, etc... you cannot make profit off half a shirt or a quarter of a shirt.

P(s) = continuous because profits doesnt have to be an exact value. For instance, you can make a profit of $12.65

Answer:

h(x)=-3;x=0

Step-by-step explanation:

When given h(x), you are in effect, being given the output of the function.

So, placing h(x)=-3 in place for h(x)

We get

-3=2x-3

Where -3+3=2x

0=2x

x=0

So, x=0

Answer:

D

Step-by-step explanation:

equation is y=mx+b

b is y intercept

m is slope

Problem 1

f(x) = x + 1/x

f(1) = 1 + 1/1

f(1) = 1 + 1

f(1) = 2

Answer: 2

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

Problem 2

(f o f)(1) = f( f(1) )

(f o f)(1) = f( 2 )

(f o f)(1) = 2 + 1/2

(f o f)(1) = 4/2 + 1/2

(f o f)(1) = 5/2

Answer:  5/2

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

Problem 3

(f o f o f)(1) = f(  f(f(1)) )

(f o f o f)(1) = f(  (f o f)(1) )

(f o f o f)(1) = f(  5/2 )

(f o f o f)(1) = 5/2 + 1/(5/2)

(f o f o f)(1) = 5/2 + 2/5

(f o f o f)(1) = 25/10 + 4/10

(f o f o f)(1) = 29/10

Answer: 29/10

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

Problem 4

(f o f o f o f)(1) = f(   f(f(f(1))   )

(f o f o f o f)(1) = f(   (f o f o f)(1)    )

(f o f o f o f)(1) = f(   29/10   )

(f o f o f o f)(1) = 29/10 + 1/(29/10)

(f o f o f o f)(1) = 29/10 + 10/29

(f o f o f o f)(1) = 841/290 + 100/290

(f o f o f o f)(1) = 941/290

Answer: 941/290

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

Problem 5

(f o f o f o f o f)(1) = f(   f(f(f(f(1))))   )

(f o f o f o f o f)(1) = f(   (f o f o f o f)(1)  )

(f o f o f o f o f)(1) = f(   941/290  )

(f o f o f o f o f)(1) = 941/290 + 1/(941/290)

(f o f o f o f o f)(1) = 941/290 + 290/941

(f o f o f o f o f)(1) = 885481/272890 + 84100/272890

(f o f o f o f o f)(1) = 969581/272890

Answer: 969581/272890

A function assigns the values. The value of (f•f•f•f•f)(1)​ is 969581/272890.

A function assigns the value of each element of one set to the other specific element of another set.

1.)

The value of f(1) for the given function f(x) =x+1/x can be calculated as shown below,

f(x) = x + 1/x

f(1) = 1 + 1/1

    = 1 + 1

    = 2

2.)

(f · f)(1) = f( f(1) )

Since the value of f(1)=2, therefore, it can be rewritten as,

(f · f)(1) = f(2)

           = 2 + 1/2

           = 4/2 + 1/2

           = 5/2

3.)

(f · f · f)(1) = f(  f(f(1)) )

Since the value of f(f(1))=5/2, therefore, it can be rewritten as,

(f · f · f)(1) = f(  (f·f)(1) )

              = f(  5/2 )

              = 5/2 + 1/(5/2)

              = 5/2 + 2/5

              = 25/10 + 4/10

              = 29/10

4.)

(f · f · f · f)(1) = f(  f(f(f(1))  )

Since the value of f(f(f(1)))=29/10, therefore, it can be rewritten as,

(f · f · f · f)(1) = f(   (f·f·f)(1)    )

                  = f( 29/10 )

                  = 29/10 + 1/(29/10)

                  = 29/10 + 10/29

                  = 841/290 + 100/290

                  = 941/290

5.)

(f · f · f · f · f)(1) = f(   f(f(f(f(1))))   )

Since the value of f(f(f(1)))=29/10, therefore, it can be rewritten as,

(f o f o f o f o f)(1) = f(   (f·f·f·f)(1)  )

                           = f(  941/290 )

                           = 941/290 + 1/(941/290)

                           = 941/290 + 290/941

                           = 885481/272890 + 84100/272890

                           = 969581/272890

Hence, the value of (f•f•f•f•f)(1)​ is 969581/272890.

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Answer:

The answer is $150

Step-by-step explanation:

hope that helps

Solutions: $100x.50=50

$100+$50= $150

Answer:

Constants

hopefully this helps

Answer:

part 1

circle, 11

part 2

decrease

Step-by-step explanation:

Answer:

1 1/2 - 3/4=?

CHange the first value to an improper fraction first, 1 1/2--->3/2

3/2-3/4=?

multiply the first value by 2/2 to get a common denom

6/4-3/4=?

subtract

6/4-3/4=3/4

3/4 is your answer

Step-by-step explanation:

Answer:

3/4

Step-by-step explanation:

This hack will help you with fractions:

Think about it like this:  1 1/2 = 1.5

And 3/4 = 0.75

There for 1.5 - 0.75 = 0.75 = 3/4

Hope that helps