Ten cards are numbered from 1 to 10 and placed in a box. One card is selected at random and replaced. Another card is randomly selected. what is the probability of selecting two even numbers? Hint: It's not 4/9 :(

I think the answer is b. cos(pi theta)= -0.6

The requried solution of the equations in the interval form are a. (-0.575, 0.575) and b. (0.71, 3.43).

These are the equation that contains trigonometric operators such as sin, cos.. etc.. In algebraic operations.

a.

We can solve for theta by dividing both sides by 3, then taking the inverse cosine of both sides. Remember that there will be two solutions in the given interval because cosine has a period of 2π.

3cos(4Ф) = -2

cos(4Ф) = -2/3

4Ф = ±cos⁻¹(-2/3)

cos⁻¹(-2/3) ≈ 2.300

4Ф = ±2.300

Ф = ±0.575

Similarly,

b.

For cos(πФ)= -0.6
Ф=  0.71, 3.43

Thus, the requried solution of the equations in the interval form are a. (-0.575, 0.575) and b. (0.71, 3.43).

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Answer:

cot(- 90)° = 0

Step-by-step explanation:

Using the identity

cot x = [tex]\frac{cosx}{sinx}[/tex] , then

cot(- 90)° = [tex]\frac{cos(-90)}{sin(-90)}[/tex] = [tex]\frac{0}{-1}[/tex] = 0

Answer:

Step-by-step explanation:

4u + 8v = -3u + 2v

7u + 8v = 2v

7u = -6v

h(u) = -6v/7

Answer:

if the circumference is 9 is a simple process if of dividing the circumference by pi which turns out to be roughly 2.86

Answer:

w=35

Step-by-step explanation:

See the angle to the right of 125? Put those angles together, and you get 180 degrees. For starters, we want to find the measure of the angle to the right of 125.

180-125=55

We can basically do this all over again to find w. The angle 55 + w + the square angle is 180 degrees. You can tell by the flat line. So we will find w like this:

180-90-55=w

Thus, w equals 35

Answer:

  6

Step-by-step explanation:

The work involved in making the poster is the product of students and hours:

  work = students × hours = (9 students)(10 hours) = 90 student·hours

__

If hours are reduced to 6, the necessary number of students is ...

  90 student·hours = (6 hours)(students)

  (90 student·hours)/(6 hours) = 15 students . . . . . . divide by 6 hours

If 15 are needed, then the number that must be added is ...

  15 -9 = 6 . . . . students need to be added

Answer:

g(x)=x²/4

Step-by-step explanation:

g(x)=ax²+bx+c

g(0)=0  => c=0

g(-2)=1 => 4a-2b=1;

g(2)=1  => 4a+2b=1   (+)

                8a=2   => a=1/4

4*1/4+2b=1=> b=0

=> g(x)=x²/4

Answer: A because it goes from (0,infinity) so all positive real numbers

Answer:

3 by 4

Step-by-step explanation:

12 reduced by 75% is 3

16 reduced by 75% is 4

Answer:

100%-75% is equal to 25%

So 12 times 25% is 3

And 16*25% is 4

The new dimensions are 3 by 4

Step-by-step explanation:

Answer:

see explanation

Step-by-step explanation:

Given x and y are in proportion then the equation relating them is

y = kx ← k is the constant of proportion

To find k use an ordered pair from the table

Using (2, 10 ), then

10 = 2k ( divide both sides by 2 )

5 = k , thus

y = 5x ← relationship between x and y

Answer:7 ft

Step-by-step explanation:

Given

Height of tree house is [tex]6\ ft[/tex]

inclination of slide [tex]\theta =60^{\circ}[/tex]

In [tex]\triangle PQR[/tex] we can write

[tex]\sin \theta =\frac{PQ}{PR}[/tex]

[tex]\sin 60=\frac{6}{PR}[/tex]

[tex]PR=\frac{6}{\sin 60^{\circ}}[/tex]

[tex]PR=\frac{6\times 2}{\sqrt{3}}[/tex]

[tex]PR=6.928\approx 7\ ft[/tex]

So, [tex]7 \ft[/tex] of aluminium is required for slide

Answer:

This is how you find the comosite figure

Separate the figure in simpler forms, which can be discovered in a composite figure field. Then merge the fields. Keep in mind that none of the simple figures have overlaps. Example 1: Find the area shown below for the composite form

Step-by-step explanation:

If you still need help, i will give you the answer.

Hope that helps.

Answer:

48

Step-by-step explanation:

Answer:

They are the same so it'd be isosceles

Step-by-step explanation:

Hope this helps!!!

Answer:

There are Equilateral, Isosceles and Scalene triangles

Step-by-step explanation:

When all three sides of a triangle are all the same length, it is a equilateral triangle. When only 2 of the sided are the same length, it is a isosceles triangle. When none of the sides are the same, it is scalene.

Answer:

Lateral = 48 cm squared and Surface area = 60 cm squared

Step-by-step explanation:

Lateral surface area  = 4 x 4 + 5x4( Slope) +  4 x 3 (Cross section x2) = 48

Surface area: Lateral + 4x3(base)

Answer:

430;400

Step-by-step explanation:

So tenth is the 2.. 5 makes it go to 3 430

hundred we look to change 4 so we look at tenths 2 is less than 5 so it stays the same 400

Answer:

(0,-7),(1,-3),(2,1)

Step-by-step explanation:

Answer:

15 presents

Step-by-step explanation:

42 cm / 14 presents = 3 cm / 1

3cm / 1 presents = 45 / 15

Answer:

15 presents

Step-by-step explanation:

Since we are using unit rate, we have to find out how many centimeters he uses for 1 present. Therefore 42÷14=3 So he uses 3 centimeters of paper for 1 present. Since he used 45 centimeters of paper we divide that by 3 to see how many presents is in 45 centimeters. When dividing the answer is 15. Therefore he wraps 15 presents

The probability Kalya rolls an even number on the red cube and a multiple of [tex]3[/tex] on the blue cube is [tex]16%[/tex] percent, when both the cubes have faces labeled [tex]1[/tex] through [tex]6[/tex].

The ratio of the favourable number of outcomes to the total number of outcomes is known as Probablity.

First, find the possible outcomes.

Kalya has a red number cube and a blue number cube. Each number cube has faces labeled [tex]1[/tex] through [tex]6[/tex].

So, possible outcomes [tex]=(6[/tex]×[tex]6)=36[/tex]

Let, [tex]S[/tex] be the sample space.

Then, [tex]n(S)=36[/tex]

Let, [tex]E=[/tex]the event of getting an even number on the red cube and a multiple of [tex]3[/tex] on the blue cube.

[tex]E=(2,3),(2,6),(4,3),(4,6),(6,3),(6,6)[/tex]

Then, [tex]n(E)=6[/tex]

Let, [tex]P[/tex] is the probability of the event [tex]E[/tex].

So, [tex]P(E)=\frac{n(E)}{n(S)}=\frac{6}{36}=\frac{1}{6}[/tex]≈[tex]16[/tex] percent

Thus, the probability Kalya rolls an even number on the red cube and a multiple of [tex]3[/tex] on the blue cube is [tex]16[/tex] percent.

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Answer:

Α. 16%

Step-by-step explanation:

Answer:

I think it's 945 but i'm not sure. actually i'm probably wrong, sorry

Step-by-step explanation:

Answer:

8

Step-by-step explanation:

960/15=64

Square root of 64 is 8

Answer:

579.29

Step-by-step explanation:

Answer:

 1512m2

I think this is the answer please do not report if wrong.

Answer:

d

Step-by-step explanation:

because it gets bigger so they are not going to have the same measures or lenghts.

The statement that is not true about the dilation is (c) the segment AB is congruent to the segment A'B

When a shape is dilated, the orientation of the shapes is preserved but the side lengths of the shapes are not congruent

This means that the side lengths of triangle A'B'C are not congruent to triangle A'B'C

Hence, the statement that is not true about the dilation is (c) the segment AB is congruent to the segment A'B

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Answer:

x = 23.5°

Step-by-step explanation:

The 4 angles 90, 43, x , x lie on a straight angle, thus

90 + 43 + x + x = 180, that is

133 + 2x = 180 ( subtract 133 from both sides )

2x = 47 ( divide both sides by 2 )

x = 23.5°

Answer:

You can't do this without knowing the number of hours, but you can write an equation. The equation would be 12p. P means the number of hours they worked and 12 stands for how much they earn each hour. Therefore you would multiple both of them together.

Answer:

2-packs of candy bars for 0.38 is better to buy

Step-by-step explanation:

Answer:

the first one, 2-packs of candy bars for 0.38 is better to buy

Step-by-step explanation:

The first one is 0.19$ per thing

The second one is 0.50$ per thing

Bibbidi-Bobbidi-Boo

(∩ º ෴ º )⊃━☆ﾟ.*

Who chose me as most brainly.. wait, thats you!!

Answer:

39

Step-by-step explanation:

square= lw

triangle= 1/2lw

s=9

triangle=15 divided by 2 times 4=30

you add 30 + 9 which will give you 39

Answer:

81/256

Step-by-step explanation:

3^4 = 81

4^4 = 256

put them as a fraction and u get 81/256

Answer:

25

Step-by-step explanation:

Answer:

n= 1/12

Step-by-step explanation:

1/6 ÷ 2

1/6×1/2=1/12

Two friends are sharing 1/6 of a pie. That's why it is 1/6 divided by 2. In fractions when you switch from division to multiplication, you switch the denominator and numerator, so 2/1 becomes 1/2. Then, you multiply 1/6 and 1/2. You end up with 1/12, so n= 1/12.

Each friend gets 1/12 of the pie.

Answer:

is D i had this on my math test

Step-by-step explanation:

Answer:

the area is 20 units

Step-by-step explanation:

if you plot the points then draw the rectangle then you count the amount on each side and multiply 4 times 5