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3 years ago

1. Work out the speed of a car travelling:

Mathematics

2 answers:

Norma-Jean [14]3 years ago

7 0

Answer:

10m/s,15m/s,20m/s,5m/s

Step-by-step explanation:

Speed = distance / time

a) distance = 100m , time = 10s

Speed = distance / time

Speed = 100m/10s

Speed = 10m/s

b) distance = 300m , time = 20s

Speed = distance / time

Speed = 300m/20s

Speed = 15m/s

c) distance = 700m , time = 35s

Speed = distance / time

Speed = 700m/35s

Speed = 20m/s

d) distance = 1000m , time = 200s

Speed = distance / time

Speed = 1000m/200s

Speed = 5m/s

I hope this was helpful, please rate as brainliest

egoroff_w [7]3 years ago

6 0

Step-by-step explanation:

speed is a scalar quantity (which only needs a magnitude), and velocity is a vector quantity (needs a magnitude with a direction)

Here since they want the "speed" you can use the velocity formula, but without a direction.

$velocity = \frac{distance}{time}$

A. v=100/10

v=10m/s

B. v=300/20

v=15m/s

C. v=700/35

v=20m/s

D. V=1000/200

v=5m/s

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0=-20.5x+16.35x-0.1245

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The value of x in the given equation $-20.5x+16.35x -0.1245 = 0\\$ is 0.03

<u>Step-by-step explanation:</u>

The given equation is that $-20.5x+16.35x -0.1245 = 0\\$

<u>The steps to be followed to solve the equation are :</u>

Add the like terms together to reduce the equation in a simplified form.

Here, there are two x terms and they must be reduced to a single term.

For this, add the both terms together so that the equation is simplified into one x term and a constant term.

⇒ $(-20.5x+16.35x) - 0.1245 = 0$

⇒ $4.15x-0.1245 = 0$

To eliminate the constant term on the left side of the equation, add 0.1245 on both sides.

⇒ $4.15x -0.1245+0.1245 = 0.1245$

⇒ $4.15x = 0.1245$

Now, the equation is further simplified by dividing 4.15 on both sides,

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⇒ $x = 0.03$

Therefore, the value of x is 0.03

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3 years ago

Juan bought fruit from the grocery store. The variables below define his purchase. Juan’s bananas cost half as much as apples. W

mixas84 [53]

Answer:

$B = \frac{1}{2}A$

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Step-by-step explanation:

Given

Represent apple with A and Banana with B

Required

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From the question, we understand that:

B costs half as much as A

This can be represented as:

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