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Natalka [10]
3 years ago
13

I need help with 4 and 5

Mathematics
2 answers:
zmey [24]3 years ago
8 0
4.  where you have any repeated x values this is not a function  
Answer is  b

5. a has rate of change = -3,  so has c,
b has rate of change (7-5)/(-1-(-2) =  2
d has rate of change  (10-6)/(6-2) = 1
madreJ [45]3 years ago
6 0
4. Look at each set of points. If all x-coordinates are different, it is a function. If the same number shows up more than once as an x-coordinate, it is not a function.
Here are the x-coordinates for each choice:
a. 0, 1, 2, 3 All are different. This is a function.
b. 0, 0, 2, 2 There are two zeros and two twos. Not a function.
c. 0, 1, 2, 3 All are different. This is a function.
d. 0, -1, -2, -3 All are different. This is a function.

5. The rate of change is the slope.
a. slope is -3
b. slope = (9 - 7)/(0 - (-1)) = 2
c. 3y + 9x = 10
3y = -9x + 10
y = -3x + 10/3
slope = -3
d. slope = (14 - 10)/(10 - 6) = 4/4 = 1

The greatest slope is 2 in option b.
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On a large map 3 cm represents 45 km how many cm are needed to represent 600 kilometres on this map?
Fantom [35]

Answer:

Number of cm= 40 cm

Step-by-step explanation:

Giving the following information:

3 cm equals 45 kilometers

1 cm= 45 /3 = 15km

<u>We need to determine how many centimeters represents 600 km. We will use the following formula:</u>

<u></u>

Number of cm= total km / km per one cm

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3 years ago
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Zarrin [17]
0.9 is 0.9278 rounded to the nearest tenth. Hope this helps!
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Which is the sum of 14t/10t^2 + 5t^2+40t/10t^2
Softa [21]

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Step-by-step explanation:

4 0
3 years ago
Justin is marking a border for a garden. He walks 200 feet to the east, then turns and
ELEN [110]

Answer:

d = 233.23 feet

Step-by-step explanation:

Given that,

Justin walks 200 feet to the east, then turns and  walks 120 feet due south.

We need to find the total distance walked by Justin. Let the distance be d.

We can use the Pythagoras theorem to find it such that,

d=\sqrt{d_1^2+d_2^2} \\\\d=\sqrt{200^2+120^2} \\\\d=233.24\ feet

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2 years ago
Write an equivalent expression for 20(x-5)
mamaluj [8]

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40(x-10)

Step-by-step explanation:

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