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Anon25 [30]
2 years ago
7

Tell whether each relationship is a function.

Mathematics
1 answer:
Serhud [2]2 years ago
8 0

Answer:

3 is a function.

1 and 2 are not.

Step-by-step explanation:

1 and 2 are not functions because we can draw a vertical line which passes through  more than one point on the graphs.

You cant do this on graph 3 so it is a function.

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Keith is saving money for a car. He has saved the same amount each year for the past three years, and records how much he has at
noname [10]

Answer:

Keith's unit rate of change of dollars with respect to time is $1500.

Step-by-step explanation:

It is given that Keith is saving money for a car.

Year 1: 1500

year 2: 3000

year 3: 4500

Let y be the saved amount after x year.

The coordinate pairs according to the given table are (1,1500), (2,3000) and (3,4500).

The formula for rate of change is

Consider any two coordinate pairs.

Let as consider (1,1500) and (2,3000). So, Keith's unit rate of change of dollars with respect to time is

Therefore, Keith's unit rate of change of dollars with respect to time is $1500.

8 0
3 years ago
If ³√a=am , what is m​
Zina [86]

\sqrt[3]{a}  =  {a}^{m}  \\  =  >  { a}^{ \frac{1}{3} }  =  {a}^{m}  \\  =  > m =  \frac{1}{3}

<u>Answer</u><u>:</u>

<u>m =  \frac{1}{3}</u>

Hope you could understand.

If you have any query, feel free to ask.

8 0
2 years ago
Let x and y be two positive numbers whose sum is 175 and (x+3)(y+4) is a maximum
Vaselesa [24]

Answer:

Step-by-step explanation:

x+y = 175

y = 175 - x

f(x) = (x+3)(y+4)

= x(175-x) + 3(175-x) + 4x + 12

= 175x - x² + 525 - 3x + 4x + 12

= -x² +176x + 537

f'(x) = -2x + 176

maximum when x = 88

y = 175-x = 87

4 0
2 years ago
#7 please help!!!!!!!!!!!!!!!!!!!!!!!!!
Ira Lisetskai [31]
If they all painted at the same rate the equation is this 

mothers 8
daughters 12  at 220 sq ft


mothers 6
daughters 8 at 152 sq ft

220 +152 =372 divided by 34 (because they all painted at the same rate)=10.94 sq ft they each painted
4 0
3 years ago
On a blueprint, the scale indicates that 7 cm represent 16 ft. What is the length of a room that is 9.8 cm long and 5 cm wide on
Ira Lisetskai [31]
The room is 22.4 feet long

7cm=16ft
9.8cm=?ft

  7cm       9.8cm
______=______
  16ft          x ft

Cross multiply
7x=156.8
divide both sides by 7
x=22.4 ft


3 0
3 years ago
Read 2 more answers
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