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3 years ago

Write the number with 5 hundreds and 2 thousands

Mathematics

1 answer:

mina [271]3 years ago

6 0

Answer:

500 2000

Step-by-step explanation:

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Find the discriminant and determine the nature of the roots to the quadratic equation

Katen [24]

№17
$x^{2} +6x-7=0 \\ D=6 ^{2} -4*(-7)=36+28=64=8 ^{2} \\ \\ x_{1} = \frac{-6+8}{2} =1 \\ \\ x_{2} = \frac{-6-8}{2} =-7$
Answer: x₁ = 1
   x₂ = - 7

№18
$2 x^{2} -3x+4=3 \\ 2 x^{2} -3x+4-3=0 \\ 2 x^{2} -3x+1=0 \\ \\ D= -3 ^{2} -4*2=9-8=1 \\ \\ x_{1} = \frac{3+1}{2*2} = \frac{4}{4} =1 \\ \\ x_{2} = \frac{3-1}{2*2} = \frac{2}{4} =0.5$
Answer: x₁ = 1
     x₂ = 0,5.

№19
$2 x^{2} -4x-5=0 \\ D=-4 ^{2} -4*2*(-5)=16+40=56 \\ \\ x_{1}= \frac{4+ \sqrt{56} }{2*2} = \frac{4}{4} + \sqrt{ \frac{56}{16} } =1+ \sqrt{3.5} \\ \\ x_{2} = \frac{4- \sqrt{56} }{2*2} = \frac{4}{4} - \sqrt{ \frac{56}{16} } =1- \sqrt{3.5} 
$
Answer: x₁ = 1 + √3.5
     x₂ = 1 - √3.5

3 0

4 years ago

What is the value of z in the equation 3z + 5 = 4z − 8? hurry

Bad White [126]

Z=13 I had a similar problem before and I've gotten it right.

8 0

3 years ago

Read 2 more answers

Classify the quadrilateral. Then find the value(s) of the variable(s). PLEASE HELP

bazaltina [42]

Answer:

Step-by-step explanation:

plug in y and x, if you want to be sure of each answer

In the case of A) here are the 2 equations, y-2=x+4 and 3x+4=x+6

now plug in what a describes

x=1, y=7

7-2=1+4 and 7=7

Therefore the answer is A

6 0

3 years ago

8x2 + 96x + 288 i really need help thanks

Elodia [21]

Answer:

8x² + 96x + 288 = 8(x + 6)²

Step-by-step explanation:

96÷8=12

288÷8=36

8x² + 96x + 288 = 8(x² + 12x + 36)

= 8(x² + 2(1)(6)x + 6²)

= 8(x + 6)²

7 0

3 years ago

PLS HELP THE SQUARE ROOT OF -17

jek_recluse [69]

Answer:

i√17 ≈ 4.123106i

Step-by-step explanation:

The square root of a negative number is "i" times the square root of its absolute value. It is an imaginary number.

_____

i is generally the symbol used for √(-1). In some fields, such as electrical engineering, where i has a different meaning, the symbol j may be used instead.

6 0

3 years ago