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bekas [8.4K]
3 years ago
10

"18 {x}^{2} - x - 39 " align="absmiddle" class="latex-formula">
How to solve this ​
Mathematics
2 answers:
Anton [14]3 years ago
7 0
I don’t know if you can solve it since it is an expression?
Maru [420]3 years ago
7 0
The answer is X=1.5

x squared = 2.25 (1.5 x 1.5)

18 x 2.25 = 40.5

40.5 - 1.5 = 39
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You are a traffic accident investigator. You have arrived at the scene of an accident. Two trucks of equal mass (3,000 kg each)
Kazeer [188]

Answer:

1) Kinetic energy of the truck 1 is 600,000 joules.

Kinetic energy of the truck 2 is 1,837,500 joules.

2 a)Potential energy of truck 1 is 646,800 Joules.

b) Energy lose by the truck 1 just got converted into heat and sound energy during the collision.

Step-by-step explanation:

Mass of the truck 1 and truck 2,m = 3000 kg

Velocity of the truck 1, v_1 = = 20 m./s

Velocity of the truck 2,v_2 = 35 m./s

1. Kinetic energy of the truck 1:\frac{1}{2}mv_{1}^2=\frac{1}{2}\times 3000 kg\times (20 m/s)^=600,000 joules

Kinetic energy of the truck 2:\frac{1}{2}mv_{2}^2=\frac{1}{2}\times 3000 kg\times (35 m/s)^=1,837,500 joules

2.a) Energy loose by the truck 1:

Initial height of the truck on the hill = 22 m

At that height potential energy will be maximum:

Potential energy of truck 1 at that height = mgh=3000\times 9.8 m/s^2\times 22 m=646,800 Joules

b) Energy lose by the truck 1 just got converted into heat and sound energy during the collision.

3 0
3 years ago
Expand (- 3a - 5x) (- 2b - 4y).​
vekshin1

Answer:  −3a(−2b−4y).−5x(−2b−4y). to this  

6ab+12ay+10bx+20xy

Step-by-step explanation: hope this helps :)

8 0
3 years ago
Read 2 more answers
I need some help on this, algebra, need some answers asap, please! Brainliest and 10 pts to the most helpful answer :)
tigry1 [53]
12 = r - (34 - 2)
subtract he 2 from 34

12 = r - (32)
add 32 to each side

r = 44

Check:

12 = 44 - (34 - 2)
12 = 44 - 32
12 = 12 :)
5 0
3 years ago
Two boys are throwing a baseball back and forth. The ball is 4 ft above the ground when it leaves one child’s hand with an upwar
Annette [7]
Hello

the asnwer is 12 feet

have a nice day
4 0
3 years ago
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You arrive at an intersection with traffic lights that are not working because of a power outage
yulyashka [42]

Traffic rules are set by each individual state.

In most states, an intersection where traffic lights are out of order
is treated as if it were a 4-way STOP.

But you can't depend on this answer.  You MUST determine what
the law is in the state where you're driving.  And if you drive out of
state, it may change for you.

5 0
3 years ago
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