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sertanlavr [38]
3 years ago
12

Please explain this to me.

Mathematics
1 answer:
Nutka1998 [239]3 years ago
3 0

Answer:

  • The value of x is 12 units.

Step-by-step explanation:

<u>We know that:</u>

  • Formula: h² = a² + b²

<u>Let's solve using Pythagoras theorem.</u>

  • => 13² = 5² + x²
  • => 169 = 25 + x²
  • => 169 - 25 = x²
  • => 144 = x²
  • => √x² = √144
  • => x = √144
  • => x = 12

Hence, the value of x is 12 units.

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The sum of the roots of 2x squared + 8x -3=0 is?
Helen [10]
According to Vieta's formula, if x_1,x_2 are solutions of quadratic equation ax^2+bx+c=0, then:

\displaystyle x_1+x_2=- \frac{b}{a}

In our case:

\displaystyle x_1+x_2=- \frac{8}{2} =-4
4 0
3 years ago
I need help please.​
Arturiano [62]

Answer:

a

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6 0
3 years ago
A car can travel 120 km in 2 hours.How long will it take the car to travel 300 km?
kakasveta [241]

We first find out time taken to travel for just 1 km

2hrs is equivalent to 120 minutes

120 km  = 120 min

1 km  =  x        (where x is the time taken to travel 1 km).

we simplify the equation by cross - multiplying the equation , so:

120  × x = 1 × 120  → 120x = 120  → x  = 120/120 → x = 1

So  the car covers 1km  in 1 minute

For 300 km the car will take 300 × 1 minute = 300 minutes

we convert minutes to hours by dividing by 60 → 300 / 60 = 5

Therefore the car will take 5 hours to cover 300 km.





8 0
3 years ago
Read 2 more answers
8:
MakcuM [25]

Answer: blue

Step-by-step explanation:

5 0
3 years ago
F(x)=2.8x-12 and g(x)=5.8x+9
xxMikexx [17]
Hi, there! 

I'm not sure what you want to solve in these equations. Please provide me with more details. I am sorry if you were looking for answers to the question, but I simply do not know what you are asking for. 

Thanks!


6 0
3 years ago
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