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3 years ago

Todo esta en la foto Everything is in the picture

Mathematics

1 answer:

torisob [31]3 years ago

5 0

Vendieron un total de 7 camas elásticas porque 689.50 / 98.50 son 7. (they sold a total of 7 trampolines because 689.50/98.50 is 7)

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P(A) = 0.33, P(A and B) = 0.25, find P(B

motikmotik

Answer:

≈0.76

Step-by-step explanation:

P(A) = 0.33

P(A and B) = 0.25

P(B) = ?

-------------

<u>Probability of two events happening is the product of individual probabilities</u>

P(A and B) = P(A)×P(B)

<u>Then to find the probability of one of the events: </u>

P(B) = P(A and B) / P(A)
P(B) = 0.25 / 0.33 ≈ 0.76

6 0

3 years ago

shiny shampoo bottle cost 6.98 for a 14 oz bottle. A 28 oz bottle of shiny shampoo cost 19.99 you have a 2.00 coupon good on any

AleksandrR [38]

ANSWER= 14 oz bottle

6.98 - 2 = 4.98 (14oz)
19.99 - 2 = 17.99 (28oz)

28 is triple the price when it’s only two times bigger

4 0

3 years ago

Which of the following is a solution to 2cos2x − cos x − 1 = 0?

Pavel [41]

Answer:

Option A is correct.

Solution for the given equation is, $x = 0^{\circ}$

Step-by-step explanation:

Given that : $2\cos^2x -\cos x -1 =0$

Let $\cos x =y$

then our equation become;

$2y^2-y-1= 0$ .....[1]

A quadratic equation is of the form:

$ax^2+bx+c =0$ .....[2] where a, b and c are coefficient and the solution is given by;

$x = \frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Comparing equation [1] and [2] we get;

a = 2 b = -1 and c =-1

then;

$y = \frac{-(-1)\pm \sqrt{(-1)^2-4(2)(-1)}}{2(2)}$

Simplify:

$y = \frac{ 1 \pm \sqrt{1+8}}{4}$

$y = \frac{ 1 \pm \sqrt{9}}{4}$

$y = \frac{ 1 \pm 3}{4}$

$y = \frac{1+3}{4}$ and $y = \frac{1 -3}{4}$

Simplify:

y = 1 and $y = -\frac{1}{2}$

Substitute y = cos x we have;

$\cos x = 1$

⇒ $x = 0^{\circ}$

and

$\cos x = -\frac{1}{2}$

⇒ $x = 120^{\circ} \text{and} x = 240^{\circ}$

The solution set: $\{0^{\circ}, 120^{\circ} , 240^{\circ}\}$

Therefore, the solution for the given equation $2\cos^2x -\cos x -1 =0$ is, $0^{\circ}$

8 0

4 years ago

Read 2 more answers

I don't understand this

Anna11 [10]

Answer:

I'm not 100% sure, but it might be "dynamic"

8 0

3 years ago

Read 2 more answers

How would you convert from kiloliters to dekaliters?

Karolina [17]

One dekaliters = 10 L.
Its A, divide by 100.

8 0

3 years ago

Read 2 more answers