All categories

3 years ago

Need an answer, please need an answer, please

Mathematics

1 answer:

Ulleksa [173]3 years ago

5 0

Answer:

Step-by-step explanation:

1)x² - 16x = - 64

x² - 16x + 64= 0

a = 1 ; b = -16 ; c = 64

D = b² - 4ac = (-16)² - 4*1*64 = 256 - 256 =

D = 0

2) 9x² = 9x + 2

9x² - 9x - 2 = 0

D = (-9)² - 4*9*(-2) = 81 + 72

D = 153

3)x² - 3 = x

x² -x - 3 =0

D = (-1)² - 4*1*(-3) = 1 + 12 = 13

D = 13

4) 3x² + 4x + 2=0

D = 4² - 4*3*2 = 16 - 24 = -8

D = -8

5)x² - 4 = 0

D = 0 - 4*1*(-4) = 0 + 16 = 16

D = 16

You might be interested in

Math Escape Level 3 plz hurry it is due to today bestie

fenix001 [56]

Answer:

Step-by-step explanation:

x-9=-8

x=-8+9

x=1

8 0

3 years ago

Explain how you can find the constant of proportionality from a graph representing a proportional relationship when it shows a p

Vladimir [108]

tienees que fijartelos extrreemos

8 0

3 years ago

a particular species of bamboo can grow up to 91 centimeters in a day. how fast is this in inches per hour

solniwko [45]

I would probably just do 91 times 60 since 60 min is 1 hour

8 0

3 years ago

How to evaluate the limit

anzhelika [568]

$\displaystyle\lim_{x\to2}\frac{x^2-x+6}{x+2}$

Both the numerator and denominator are continuous at $x=2$ , which means the quotient rule for limits applies:

$\dfrac{\displaystyle\lim_{x\to2}(x^2-x+6)}{\displaystyle\lim_{x\to2}(x+2)}=\dfrac{2^2-2+6}{2+2}=\dfrac84=2$

Perhaps you meant to write that $x\to-2$ instead? In that case, you would have

$\displaystyle\lim_{x\to-2}\frac{x^2-x+6}{x+2}=\lim_{x\to-2}\frac{(x+2)(x-3)}{x+2}=\lim_{x\to-2}(x-3)=-2-3=-5$

4 0

3 years ago

Darnel has $9 in a savings account. The interest rate is 10%, compounded annually.

aksik [14]

9514 1404 393

Answer:

$2.98

Step-by-step explanation:

The amount of interest earned is ...

I = P((1 +r)^t -1)

I = $9(1.1^3 -1) ≈ $2.98

Daniel will earn about $2.98 in interest in 3 years.

6 0

3 years ago

Need an answer, please need an answer, please​

Need an answer, please need an answer, please