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3 years ago

Dan earns £9.90 per hour. How much will he earn for 4 hours work?

Mathematics

2 answers:

Natasha2012 [34]3 years ago

8 0

Answer:

39.60

Step-by-step explanation:

9.90 x 4 = 39.60

sdas [7]3 years ago

6 0

So he earns £9.90 per hour
And you need to know how much will he make for 4 hours ?
Answer: £9.90x4

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Let f = {(x, y) ∈ R × R | xy = 2x + y + 1} There is at least one x ∈ R with no y ∈ R. Find all such problematic x ∈ R. Then rest

loris [4]

Answer:

Problematic x is x = 1

Step-by-step explanation:

Equation:

xy= 2x + y + 1

xy - y = 2x + 1

y(x-1) = 2x + 1

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

The problematic x is such that when the denominator of the function is 0

x - 1 = 0

x = 1 (the problematic x)

So the domain of f is: x is the subset of R (real number) with the exception of x =/ 1 (x not equal to 1)

To prove this, we can plot the graph and in the graph we can see that as the value of x approaches from negative values to 1, y value will approaches negative infinity, and as the value of x approaches from large positive numbers, y value approaches infinity.

In other words, we'll see an assymptote at x=1

To prove that it is a function, we can do vertical line test by drawing vertical lines accross the graph. We'll see that each line crosses the equation line once hence proving the equation as a function

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3 years ago

Johnathan went shopping at HEB. He began to look at two different cereals below Sunshine Cornflakes: 24-ounce box for $4.32 Brig

mel-nik [20]

Answer:

Step-by-step explanation:

Given that:

Johnathan looked at two different portions of cereals at the supermarket.

They are:

Sunshine Cornflakes: 24-ounce box for $4.32

Bright Start Cornflakes: 36-ounce box for $5.76

To calculate the cost of one ounce of Sunshine cornflakes, we have:

24-ounce box for $4.32

1 - ounce box will be x

x = ($4.32 × 1 ounce box) / 24 ounce box

x = $0.18

1 - ounce box will be = $0.18

To calculate the cost of one ounce of Bright star cornflakes, we have:

36-ounce box for $5.76

1 - ounce box will be = ( $5.76 × 1 ounce box) / 36 ounce box

1 - ounce box will be = $0.16

Since 1 - ounce box of Bright star cornflakes is lesser than 1 - ounce box of Sunshine Cornflakes.

Then, Bright star cornflakes costs ($0.18 - $0.16) = $0.02 per ounce box lesser than Sunshine Cornflakes.

Thus, Bright star cornflakes will be a better buy.

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3 years ago

The probability that a student guesses the correct answer to a four-choice multiple-choice question is P(correct)=0.25. How man

mylen [45]

Answer: 18

Step-by-step explanation:

0.25 or 1/4 can be answered correctly

there's 72 questions

0.25*72=18

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3 years ago

What does this app do?

Nuetrik [128]

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3 years ago

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Find the circumference of a circle that has an area of 452.16 square meters. (Use 3.1416 as the value of π.)

laila [671]

$\bf \textit{area of a circle}\\\\
A=\pi r^2\quad 
\begin{cases}
r=radius\\
-----\\
A=452.16
\end{cases}\implies 452.16=\pi r^2\implies \cfrac{452.16}{\pi }=r^2
\\\\\\
\boxed{\sqrt{\cfrac{452.16}{\pi }}=r}\\\\
-------------------------------\\\\
\textit{circumference of a circle}\\\\
C=2\pi r\qquad \qquad \implies C=2\pi \left( \boxed{\sqrt{\cfrac{452.16}{\pi }}} \right)$

so, is just that product, recall to use "<span>3.1416 as the value of π".</span>

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3 years ago