please solve all 4 questions :) to be given the brainliest

Answer:

0.50 :)

Step-by-step explanation:

The probability of the union of being either a freshman or junior is 0.50

"Probability is a branch of mathematics which deals with finding out the likelihood of the occurrence of an event."

P(A) = n(A)/n(S)

where,  n(A) is the number of favorable outcomes,

n(S) is the total number of events in the sample space.

For given example,

Students have equal probabilities of being freshmen, sophomores, juniors, or seniors.

⇒ P(freshman) = 0.25

⇒ P(sophomores) = 0.25

⇒ P(juniors) = 0.25

⇒ P(seniors) = 0.25

We know for event A and B,

P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

Assuming event A : student is a freshman

event B : student is junior

P(A) = 0.25

P(B) = 0.25

The number of students who are freshman as well as junior = 0

⇒ n(A ∩ B) = 0

⇒ P(A ∩ B) = 0

Now, the probability of the union of being either a freshman or junior would be,

⇒ P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

⇒ P(A ∪ B) = 0.25 + 0.25 - 0

⇒ P(A ∪ B) = 0.50

Therefore, the probability of the union of being either a freshman or junior is 0.50

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Answer:

x + 5 = 23

Step-by-step explanation:

Just write it like how you say it.

The algebraic expression for the given phrase is x+5=23.

In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.

The given phrase is "x plus five is twenty three"

Here, the equation is x+5=23

The solution of an equation is the set of all values that, when substituted for unknowns, make an equation true.

Transpose 5 to the RHS of the equation, we get

x=23-5

x=18

Therefore, the x value is 18.

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Answer:

d = 75√2 yds

Step-by-step explanation:

Use the Pythagorean Theorem to find the length of the diagonal of the playground:

(75 yd)^2 + (75 yd)^2 = d^2, or

d^2 = 2(75 yd)^2

Taking the square root of both sides, we get:

d = 75√2 yds

Answer:

5. h = 12

6. k = 17, m = 12

Step-by-step explanation:

5. The sum of angles on the adjacent side of a diagonal of a parallelogram is 180 degree

[tex]3h + 24 = 4 h + 12\\h = 12[/tex]

6. The  angle is 90 degrees

[tex]5k + 5 = 90\\k = 17\\7m + 6 = 90\\m = 12[/tex]

Answer:

[tex]volume = 10\pi m^3[/tex]

Step-by-step explanation:

Volume of a prism = Base Area x height

Base is a quarter of a circle.

              [tex]Area \ of \ circle = \pi r^2\\\\r = 2m\\\\Area \ of \ quarter \ of \ a \ circle = \frac{1}{4} \pi r^2 = \frac{1}{4}\pi \times 4 = \pi m^2[/tex]

Base Area = π square meters.

Therefore ,

          [tex]Volume = Base Area \times height = \pi \times 10 = 10\pi m^3[/tex]

Answer:

b. 0.37

Step-by-step explanation:

E2020!

Answer:

95%

Step-by-step explanation:

Current MEAN = 85 + 88 + 92 + 90/4 = 88.75 %

Lets assume needed score is 92%

Mean with assume needed score: 85 + 88 + 92 + 90 + 92/5 = 89.4%

Lets assume needed score is 93%

Mean with assume needed score: 85 + 88 + 92 + 90 + 93/5 = 89.6%

Lets assume needed score is 94%

Mean with assume needed score: 85 + 88 + 92 + 90 + 94/5 = 89.8%

Lets assume needed score is 95%

Mean with assume needed score: 85 + 88 + 92 + 90 + 95/5 = 90%

Answer:

3. 49

4. 101

Step-by-step explanation:

3) 180-51-63

= 66

180 - 66 = 44

4) 180 - 86-45 = 49

180 - 49 - 30 =101

Answer:

100

Step-by-step explanation:

because 1 x 100 = 100

Answer: A. 36

B. 5:11

Step-by-step explanation:

(a)How many cold stone cones are sold?

Let the number of stone colds sold be represented by x.

Therefore, we can form an equation as:

11/9 = 44/x

Cross multiply

11 × x = 44 × 9

x = (44 × 9)/11

x = 36

The number of stone cold sold are 36.

(b)If the number of cold stone cones on the next day is reduced to 20.what is the new ratio?

The new ratio will be gotten as:

= 20/44

= 5/11

= 5:11

The ratio is 5:11

Answer:

im confused too man

Step-by-step explanation:

Answer:

Step-by-step explanation:

No, -0.25 represents a weak to moderate negative correlation.  On the other hand, -0.87 would represent a strong negative correlation.

Answer:

AC ≈ 9.52 m

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos15° = [tex]\frac{BC}{AC}[/tex] = [tex]\frac{9.2}{AC}[/tex] ( multiply both sides by AC )

AC × cos15° = 9.2 ( divide both sides by cos15° )

AC = [tex]\frac{9.2}{cos15}[/tex] ≈ 9.52 m ( to 3 sf )

Answer:

[tex]\huge \fbox \pink {A}\huge \fbox \green {n}\huge \fbox \blue {s}\huge \fbox \red {w}\huge \fbox \purple {e}\huge \fbox \orange {r}[/tex]

[tex]g = c - x \\ c - x = g \\ - x = g - c \\ x = - g - c[/tex]

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

[tex] \huge\blue{ \mid{ \underline{ \overline{ \tt ꧁❣ ʀᴀɪɴʙᴏᴡˢᵃˡᵗ2²2² ࿐ }} \mid}}[/tex]

Answer:

81 in

Step-by-step explanation:

diameter is radius squared

9 × 9 = 81

Answer:

4

Step-by-step explanation:

Answer:

b is correct

Step-by-step explanation:

Answer:

74

Step-by-step explanation:

72 + 73 + 74 + 75 + 76 = 370

370 divided by 5 = 74

Hope this helps! Leave any questions or concerns in the comments! byeee <3

Answer:

9

Step-by-step explanation:

subtract 2 on both sides

you get v=9

y=5×+630 that's question 1

the other question im not sure

Answer:

It's decreasing to the left and increasing to the right

Step-by-step explanation:

Answer:

B) -7°c

Step-by-step explanation:

Answer:

We can compute simple interest by finding the interest rate percentage of the amount borrowed, then multiply by the number of years interest is earned. Another type of interest calculates interest on both the money initialy deposited as well as the interest money earned, and is called compound interest.

Step-by-step explanation:

hope this helps

Answer:

yes

Step-by-step explanation:

Answer:

38/50 or 19/25

Step-by-step explanation:

One way could be that you add all the marbles together to get your total marbles; 12 + 10 + 15 + 13 = 50.

Then you add all the colours expect red; 10 + 15 + 13 = 38.

Which would give me 38/50; which simplifed would be 19/25

Answer:

Step-by-step explanation:

Abc

The required coordinate of the fourth vertex is (c, c).

Coordinate, is represented as the values on the x-axis and y-axis of the graph. while the coordinate x is called abscissa and the coordinate of the y is called ordinate.

here,
A rectangle has vertices (a,b), (c,b), and (a,c)
let the vertex of the first coordinate be [x, y],
Now,
for side a Corrdiante A (a, b) and B (c , b)
Now, coordinate the opposite side C(a, c) and D(x , y)

The coordinates of D must be equal to x coordinate of B and y ordinate of C so,
D(x, y) = D(c, c)

Thus, the required coordinate of the fourth vertex is (c, c).

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