3 years ago

Angela had a fully charged laptop

Mathematics

1 answer:

Korvikt [17]3 years ago

4 0

Oh that's cool... what do i do?

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Someone please help me I’ll give out brainliest please dont answer if you don’t know

Andru [333]

Answer:

subtract 7 from both sides

2x < 7- 7

subtract 7 from 7 to get 0

2x < 0

product of two numbers is < 0 if one is > 0 and the other is < 0. since 2> 0, must be < 0.

x < 0

5 0

2 years ago

Determine the kinetic energy of a 100-kg roller coaster car that is moving with a speed of 20.0/ms.

rjkz [21]

Answer:

The kinetic energy is 20,000\ J

Step-by-step explanation:

The kinetic energy of a body is defined as:

$k = \frac{1}{2}ms ^ 2$

Where m is the mass of the roller coaster car

s is the speed and k is the kinetic energy

We know that $s = 20\ m/s$

$m = 100\ kg$

Then the kinetic energy of the roller coaster car is:

$k = \frac{1}{2}(100)(20) ^ 2\\\\k = 50(20) ^ 2\\\\k = 50 * 400\\\\k = 20,000\ J$

3 0

3 years ago

Solve for y, 2y=-4x-14

BabaBlast [244]

Hello from MrBillDoesMath!

Answer: y = 2x - 7

Discussion:

Divide both sides of the equation by 2:

2y /2 = (4x-14)/2 = 4x/2 -14/2

y = 2x - 7

Thank you,

MrB

7 0

3 years ago

EVALUATE: 10x – 2y3 (if x = 5 and y = 2)

Archy [21]

Answer:

10*(5) - 2*(2)^3

= 50 - 2*8

= 50 - 16

=34

8 0

3 years ago

Read 2 more answers

I need help. someone please explain to me

Alisiya [41]

Answer:

176. because 22 times

8 is 176

8 0

2 years ago