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Vikki [24]
3 years ago
15

Is (3,7), (3,8), (3,9), (3,10) a function

Mathematics
1 answer:
pogonyaev3 years ago
4 0

Answer:

(3,7), (3,8), (3,9), (3,10) is not a function.

Step-by-step explanation:

A function is defined as a relation in which each input value has only a single output value.

This means that for each x value there should be only one y  

value. If this criteria is not fulfilled then the relation cannot be called a function.

For the given set of points, we notice that for x=3, y=7,8,9,10 which shows there are many y-values o for a single x-value. This means there are many outputs for a single input. This disqualifies it to be a function.

Thus, (3,7), (3,8), (3,9), (3,10) is not a function.

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Lily has $2. 75 in her pocket, consisting of dimes and quarters. If there are 17 coins in all, how many of each does she have?.
Nikitich [7]

Answer:

Lily has 7 Quarters and 10 Dimes

Step-by-step explanation:

Let's use pennies instead of $.

Let <u>D</u> and <u>Q</u> stand for the numbers of Dimes and Quarters, respectively.

We are told that there are 17 coins total:

  <u> D + Q = 17</u>

We also learn that they amount to 275 (pennies).  We can write that as:

<u>10D + 25Q = 275</u>  [Each D is worth 10 pennies, etc.]

We have two equations and two unknowns.  We can rearrange one equation to find the value of either of the unknowns, and then use that it the second equation.

I'll rearrange the first:  

 D + Q = 17

<u>   D = 17 - Q</u>

Now use this value of D in the second equation:

10D + 25Q = 275

10(17-Q) + 25Q = 275

170 - 10Q + 25 Q = 275

15Q = 105

<u>Q = 7  :  7 Quarters.</u>

<u></u>

Since D + Q = 17:

D + 7 = 17

<u>D = 10 Dimes</u>

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

Let's check these results:

Q = 7 Quarters

D = 10 Dimes

1.  Is this 17 coins in total?  (7+10 = 17)  <u>YES</u>

2.  Does this add to $2.75?  (10*10) + (7*25) = 275 cents?

 (100 + 176) = 275 (cents)   <u>YES</u>

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

Lily has 7 Quarters and 10 Dimes

8 0
3 years ago
The school's math team has 14 new members this year, which makes a total of 34. The number of new members represents what percen
Aleksandr-060686 [28]
To find a % you want to divide the # of new members, by the total # of members.

14/34 =0.41

Since this gave you a decimal, multiplying by 100 will give you a %!

0.41 x 100 = 41%

This means that 41% of the club is new members!
6 0
4 years ago
Read 2 more answers
Type an equation for the line
Thepotemich [5.8K]

Answer:

y=-\frac{2}{3}x+1

Step-by-step explanation:

Let the equation of the line given in the graph is,

y = mx + b

Where 'm' is the slope of the line

And 'b' represents the y-intercept

Since slope of a line passing through two points (x_1, y_1) and (x_2,y_2) is modeled by,

m = \frac{y_2-y_1}{x_2-x_1}

If this line passes through (-3, 3) and (3, -1),

m = \frac{3+1}{-3-3}

m = -\frac{4}{6}

   = -\frac{2}{3}

And 'b' = 1

Equation of this line will be,

y=-\frac{2}{3}x+1

4 0
3 years ago
. A group of 18 people ordered soup and sandwiches for
larisa [96]

its 18 because if u add 18 to 34



7 0
4 years ago
I need help to find the volume
alexira [117]

Answer:

224ft^3

Step-by-step explanation:

l*w*h= volume

5 0
3 years ago
Read 2 more answers
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