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seropon [69]
3 years ago
8

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

speed of the other, and that is why it arrived at the suburb 1 hour before the other car. Find the speeds of both cars.
Mathematics
1 answer:
Virty [35]3 years ago
6 0

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

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Answer:

Each term is separated by an addition or subtraction sign.

Coefficients are numbers in front of a variable (letter).

Constants are numbers with nothing else.

so you get

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Step-by-step explanation:

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If you subtract -9-21 and 36-56
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What is -4/8 reduced
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3 years ago
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lutik1710 [3]

Answer:

x = -1

Step-by-step explanation:

Equation: 1+10x+13=4

Step 1: Balance both parts of the equation.

1+10x+13=4

(10x)+(1+13)=4

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10x+14-14=4-14

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3 years ago
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The B option is correct.

<h2>Exponent</h2>

Exponential notation is the form of mathematical shorthand which allows us to write complicated expressions more succinctly. An exponent is a number or letter is called the base. It indicates that the base is to raise to a certain power. X is the base and n is the power.

Given

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<h3>To find </h3>

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We know the number is -906,060.

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More about the exponent link is given below.

brainly.com/question/5497425

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