All categories

3 years ago

2x2 + 6x - 25 = 0 Can someone help me solve this?

Mathematics

1 answer:

Bumek [7]3 years ago

4 0

Answer:

Hope this helped you a little

Step-by-step explanation:

You might be interested in

Pls help trigonometry ahhh

oksano4ka [1.4K]

Answer:

x = 6.928

Step-by-step explanation:

Since we don't know the hypotenuse, we will use tan

tanΘ = opposite/adjacent (Θ = theta, which is basically the variable for an angle)

tan30° = x/12

to find x, multiply 12 to the other side

12tan30° = x (plug this into a calculator)

x = 6.928

5 0

2 years ago

Find the limit. use l'hospital's rule if appropriate. if there is a more elementary method, consider using it. lim x→1 1 − x + l

AfilCa [17]

$\displaystyle\lim_{x\to1}\frac{1-x+\ln x}{1+\cos5\pi x}$

Evaluating the limand directly at $x=1$ gives an indeterminate form $\dfrac00$ . Apply L'Hospital's rule once and we get

$\displaystyle\lim_{x\to1}\frac{-1+\frac1x}{-5\pi\sin5\pi x}$

Again, plugging in $x=1$ returns $\dfrac00$ . Apply the rule once more:

$\displaystyle\lim_{x\to1}\frac{-\frac1{x^2}}{-25\pi^2\cos5\pi x}=\frac1{25\pi^2}\lim_{x\to1}\frac1{x^2\cos5\pi x}$

Now, in the denominator, when $x=1$ we get $x^2\cos5\pi x=-1$ , so the limit is $-\dfrac1{25\pi^2}$ .

3 0

3 years ago

Combine terms: 12a + 26b -4b – 16a.

Liula [17]

Answer:

C. -4a + 22b

Step-by-step explanation:

12a + 26b -4b – 16a

= 12a – 16a + 26b – 4b

= -4a + 22b

5 0

2 years ago

Read 2 more answers

Determine the measure of an angle (in radians) that cuts off an arc length of 6.4 inches in a circle with a 6.4 inch radius.

serg [7]

1 radian
because s= r × angle measurement in radian
we have s= arc , r = radian so we got the value

5 0

2 years ago

What is 2x^2-8x<br> factorised*

Otrada [13]

Answer:

2x(x - 4)

Step-by-step explanation:

$2 {x}^{2} - 8x \\ \\ = 2x(x - 4)$

8 0

3 years ago