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2 years ago

How to tell if a relation is a function and give an example.

1 answer:

8 0

Ex: f: R ---> R
f(x)=2x+1
Definition: For every value of x , exists only one value of f(x)
f(1)=2*1+1, f(1)=2*1+1=3
f(2)=2*2+1=4+1=5
......
f(100)=2*100+1=200+1=201

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Solve for y.<br> r/3-2/y=s/5

nordsb [41]

Answer:

y = 2 / (r/3 - s/5)

Step-by-step explanation:

r/3 - 2/y = s/5

add 2/y to both sides

r/3 = s/5 + 2/y

Subtract s/5 from both sides

r/3 - s/5 = 2/y

multiply both sides by y

y(r/3 - s/5) = 2

Divide both sides by r/3 - s/5

y = 2 / (r/3 - s/5)

8 0

2 years ago

Espen predicted that he would sell 32 baseball caps, but he actually sold 29 baseball caps. Which expression would find the perc

tiny-mole [99]

Answer:C is the answer

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Lines c and d are perpendicular. The slope of line c is −23. Which equation is true?

Trava [24]

Answer:

1/23

Step-by-step explanation:

The perpendicular slope will be the opposite reciprocal of the original slope so if slope of c is -23, slope of d is 1/23

4 0

1 year ago

What is the length of side a? Round to the nearest tenth of an inch. <br><br> Please and thank youuu

lord [1]

Answer:

using Pythagoras rule, 16^2 -7^2 =a^2

so 256-49 = 297.

√207 =14.38 to the nearest tenth of an inch is 14inch.which is your answer

6 0

2 years ago

In a lab, a substance was cooked by 42 C over a period of 7 hours at a constant rate. What was the change in temperature each ho

Mekhanik [1.2K]

Given that we have the change in temperature over 7 hours and we are looking for the change over 1 hour, we can divide the total change in temperature by 7. Thus, the change in temperature would be $\frac{42}{7} C^{\circ}$ .

Additionally, this can be solved by equations:

$\dfrac{42 \,\textrm{C}^{\circ}}{7 \,\textrm{hours}} = \dfrac{x \,\textrm{C}^{\circ}}{1 \,\textrm{hour}}$

$1 \,\textrm{hour} \cdot \dfrac{42 \,\textrm{C}^{\circ}}{7 \,\textrm{hours}} = x \,\textrm{C}^{\circ}$

$\dfrac{42}{7} \,\textrm{C}^{\circ} = x \,\textrm{C}^{\circ}$

$\dfrac{42}{7} = x$

By using two different methods, we can determine that the change each hour was equal to 42/7 C° per hour.

6 0

3 years ago