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3 years ago

Pls help this question is way to hard

Mathematics

1 answer:

lubasha [3.4K]3 years ago

6 0

Answer:

men dog-59.09 women-40.90 total- 100%

men cat-61.29 women-38.70 total- 100%

men bird-39.13 women- 60.87 total- 100%

men total- 55.83 women- 44.16 total- 100%

Step-by-step explanation:

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What’s the probability of getting 6 or more girls from 8 births?

Lemur [1.5K]

Answer:

3/4 or 6/8

Step-by-step explanation:

6/8 when simplified is 3/4. That is the probability over the total.

8 0

3 years ago

24+4(3+1) I know the answer but I need to show my work can anyone show me how they got the answer cause the answer is 40 but I d

solong [7]

24 + 4(3 + 1)
= 24 + 4(4)
=24+ 16
= 40

6 0

3 years ago

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A box of fruit has three times as many nectarines as grapefruit. Together there are 64 pieces of fruit. Write the equation that

Basile [38]

Answer:

4g = 64

Step-by-step explanation:

Let n = the number of nectarines

and g = the number of grapefruit

We have two conditions that must be satisfied to represent the situation:

(1) n = 3g

(2) n + g = 64

If you need one equation, we can substitute (1) into (2) and get

4g = 64

7 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

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The ____________ blank is the number that occurs most frequently in a group of numbers.

ioda

Answer:

mode

Step-by-step explanation:

mode is the number that has the highest occurrences in a set of numbers

4 0

2 years ago