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3 years ago

Simplify the expression. (7x4)? (7x4)2 =

Mathematics

2 answers:

TEA [102]3 years ago

5 0

Answer:

Step-by-step explanation:

i took the test

NemiM [27]3 years ago

4 0

56 ??? i’m pretty sure that’s the answer

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Help me fast please I am really confused!!!!!!

seropon [69]

Answer:

By the way that the line is facing.

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2 years ago

The least common multiple of the numbers 15, 12, 8

Ymorist [56]

Answer: LCM of 8, 12, and 15 is 120.

Step-by-step explanation:

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3 years ago

Read 2 more answers

This is on claskick 7th grade 7(m +2n)<br> 7( )+ 7 ( )

mixer [17]

Answer: 7(m+2m) is equal to 7(m) + 7(2m)

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3 years ago

A car has mass 1500 kg and is traveling at a speed of 35 miles/hour. what is its kinetic energy in joules? (Be sure to convert m

photoshop1234 [79]

Answer:

Factor by which kinetic energy increase = 4 times

Step-by-step explanation:

Given,

Mass of the car, v1 = 1500 kg

initial speed of car = 35 miles/h

$=\dfrac{35\times 1609.34}{3600}\ m/s$

= 15.64 m/s

Initial kinetic energy of the car is given by,

$k_1\ =\ \dfrac{1}{2}.m.v_1^2$

$=\ \dfrac{1}{2}\times 1500\times (15.64)^2\ joule$

= 183606.46 J

Final velocity of car v2 = 70 miles/hour

$=\dfrac{70\times 1609.34}{3600}$

= 31.29 m/s

So, final kinetic energy of car is given by

$k_2\ =\ \dfrac{1}{2}.m.v_2^2$

$=\ \dfrac{1}{2}\times 1500\times (31.29)^2$

= 734425.84 J

Now, the ratio of final to initial kinetic energy can be given by,

$\dfrac{k_2}{k_1}=\ \dfrac{734425.84}{183606.46}$

$=>\ k_2\ =\ 4k_1$

Hence, the kinetic energy will increase by 4 times.

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3 years ago

For the quadratic equation 3x^2−7x+4=0, enter the correct values of a, b, and c.

Alex73 [517]

Answer:

since 3x^2-7x+4=0 is in the form ax^2+bx+c=0, a=3, b=-7, c=4

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3 years ago