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3 years ago

I need help with #18 & 20 Please explain so I understand

Mathematics

1 answer:

guajiro [1.7K]3 years ago

4 0

Isjsndjxksmnsjzksksms oaksmskxi haha

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Express 45000 in scientific notation

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4.5 x 10 to the power of 4

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3 years ago

Write an equation of the line y-intercept =-11/2

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4 years ago

Use a calculator to graph the functions y = –3|x – 2| and y = x3 – 3x – 3. How many points of intersection do the functions shar

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3 years ago

Read 2 more answers

There are two approaches to solving the equation -3x + 10 = 4x - 20

pashok25 [27]

Answer:

X =30/7

Step-by-step explanation:

The first way would be something like:

-7x + 10 = -20. The first thing we would do is to subtract 10 from both sides.

Therefore,

-7x+10-10=-20-10

Simplified, we get

-7x=-30

Remove the negative symbols

7x =30

x=30/7

Second example:

10=7x - 20

Add 20 to both sides.

10+20=7x-20+20

Simplified,

30=7x

x = 30/7

4 0

3 years ago

Read 2 more answers

Physics! Someone help me! Its due today please!

icang [17]

Step-by-step explanation:

We have,

Mass of ball is 9 kg

Initial speed, u = 5 m/s

Final speed, v = -2 m/s (negative as it bounces off)

(a) The change in velocity of the bowling ball is :

$\Delta v=v-u\\\\\Delta v=-2-5\\\\\Delta v=-7\ m/s$

(b) Change of momentum of the ball is :

$p=m\Delta v\\\\p=90\times (-7)\\\\p=-630\ kg-m/s$

|p| = 630 kg-m/s

(c) Impulse momentum theorem states that the change in momentum of the ball is equal to the impulse exerted on the ball. So, impulse is 630 kg-m/s.

(d) Impulse is also given by :

$J=F\times t\\\\F=\dfrac{J}{t}\\\\F=\dfrac{630}{0.3}\\\\F=2100\ N$

6 0

3 years ago