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katrin [286]
2 years ago
13

Pairs of markings a set distance apart are made on highways so that police can detect drivers exceeding the speed limit. Over a

fixed​ distance, the speed R varies inversely with the time T. In one particular pair of​ markings, R is mph when T is seconds. Find the speed of a car that travels the given distance in seconds.
Mathematics
1 answer:
coldgirl [10]2 years ago
7 0

Answer:

4

Step-by-step explanation:hrllo sdkksfdjg jdskl fg

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Multiply 6 and 7. Then, divide by 3.
posledela

6 * 7 = 42 so then you take and divide

42/3 =  14

7 0
3 years ago
Read 2 more answers
Two cars left the city for a suburb, 120 km away, at the same time. The speed of one of the cars was 20 km/hour greater than the
Virty [35]

Answer:

V1 = 60 km/h

V2 = 40 Km/h

Step-by-step explanation:

The speed of an object is defined as

Speed =  distance / time

Let

V1 be the speed of the faster car

V2 be the speed of the other car

t1 the time it took for the first car to arrive

t2 the time it took for the second car to arrive

d1 the distance traveled by first car

d2 the distance traveled by second car

We know thanks to the problem that

V1 = V2 + 20 Km/h

t1 = t2 - 1 hour

d1 = d2 = 120 Km

d1 = V1 * t1

d2 = V2* t2

V1 * t1 = V2* t2

V1* t1 = (V1 -20)*(t1 +1)

The system of equations

(V1 -20)*(t1 +1) = 120

V1 * t1 = 120

120 + (120/t1) -20*t1 = 140

(120/t1) -20*t1  = 20

Which gives,

t1 = 2

This means

V1 = 60 km/h

V2 = V1 - 20 Km/h =  40 Km/h

6 0
3 years ago
Help asap plzzzzzzzzzz​
serg [7]
Based on what I know it’s B because the others have exponents and linear functions don’t have exponents
8 0
3 years ago
The angle marked a = 146 Work out the angle marked x.​
notka56 [123]

Answer:

<h2>34 degrees</h2>

Basic facts:

<em>Corresponding angles are sometimes known as 'F' angles.</em>

angles in a straight line add up to 180

Step-by-step explanation:

To find the other side of <em>a</em> we follow the Basic fact annd do

180-146

=34

following the rule, we know that this is a flipped F

An F is a corresponding angle

therefore f is 34

5 0
2 years ago
There are 5280 feet in a mile. What fraction is represented by 240 feet?
Sauron [17]

The fraction would be the portion over the total:

240 / 5280

Divide both top and bottom by 240 and the fraction simplifies to 1/22

The answer is 1/22

7 0
3 years ago
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