Can someone help me please

Answer: 70%

Step-by-step explanation:

Not sure if this is correct but according to the red numbers there is a total of 20 classes. Looking at how many of these classes have 21 or more students we can see that the last three bars contain classes of 21 or more students. The last three bars contain a total of 14 of the 20 classes.

14/20 = 0.7 = 70%

meaning 70% of the classes contain at least 21 students.

Answer:

His weekly expense is $12.50.  You did not mention how much he earned but you would subtract the 12.50 to find out how much he earned after his expense.

Step-by-step explanation:

Using the normal distribution, it is found that statements a, b, c and e are correct.

The z-score of a measure X of a normally distributed variable with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex] is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

It states that, for a normally distributed random variable:

Hence, only statement D is false, as the mean corresponds to z-score of 0.

More can be learned about the normal distribution at https://brainly.com/question/24663213

Answer:

2,000

Step-by-step explanation:

Hope this helps you. I'd the answer is incorrect please let me know.

Answer:

20 seconds

Step-by-step explanation:

The time taken by projectile to hit the ground is 20 second.

The polynomial equations of degree 2 for a single variable of type f(x) = ax2 + bx + c = 0, where a, b, c, ∈ R, and a ≠ zero, are known as quadratic equations. The leading coefficient is referred to as "a," and the absolute term of the quadratic equation is referred to as "c." The roots of the quadratic equation (α, β). are the values of x that satisfy the equation.

Given initial velocity of a projectile = 98 m/s

equation h = -4.9t² + 98t

where t = time and h = height of projectile,

time taken by projectile to hit the ground,

where h = 0

equation will be

-4.9t² + 98t = 0

4.9t² = 98t

4.9t = 98

t = 98/4.9

t = 20 second

Hence time taken is 20 second.

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Answer:

Grapes sell at a rate of $2 per pound

Step-by-step explanation:

Step 1:  Determine the price per unit

(Price of Items) / (Total Pounds)

($4) / (2)

$2

Answer:  Grapes sell at a rate of $2 per pound

4

Step-by-step explanation:

1. Add 16 to both sides

2. Simplify

3. Divide both sides by the same factor

4. Simplify

Solution: x = 4

Answer:

Option A, [tex]z =[/tex] ± [tex]13/5[/tex]

Step-by-step explanation:

Step 1:  Add 140 both sides

[tex]25z^2 - 140 = 29[/tex]

[tex]25z^2 - 140 + 140 = 29 + 140[/tex]

[tex]25z^2 = 169[/tex]

Step 2:  Divide both sides by 25

[tex]\frac{25z^2}{25} = \frac{169}{25}[/tex]

[tex]z^2 = 6.76[/tex]

Step 3:  Square root both sides

[tex]\sqrt{z^2} = \sqrt{6.76}[/tex]

[tex]z =[/tex] ± [tex]2.6[/tex]

[tex]z =[/tex] ± [tex]13/5[/tex]

Answer: Option A, [tex]z =[/tex] ± [tex]13/5[/tex]

Answer:

$514 give or take.  I could be wrong so you might want some confirmation on my answer before putting it on your test or what ever you need it for because i'm only in Middle School.

Step-by-step explanation:

Answer: 21.5

Step-by-step explanation:

The order of operations are:

1) Parenthesis and Brackets

2) Exponents

3) Multiplication and Division (from left to right)

4) Addition and Subtraction (from left to right)

Parenthesis are first so let's solve them first

43 ÷ (7 − 3) × 2

43 ÷ (4) × 2

Now we only have division and multiplication

So we must do this from left to right, starting by 43 ÷ 4

43 ÷ 4 × 2

10.75× 2

Finally, multiply

10.75× 2

21.5

Answer:

[tex]43 \div (7 - 3) \times 2[/tex]

using BODMAS ~

[tex]43 \div (4) \times 2 \\ \\ \dashrightarrow \: \frac{43}{\cancel{4}} \times \cancel{2} \\ \\ \dashrightarrow \: \frac{43}{2} \\ \\ \dashrightarrow \: 21.5[/tex]

hope helpful ~

Answer:

The answer is 94.25 sq.in

Step-by-step explanation:

Given rectangle- 7 1/4 in by 13

to fin area for one of the triangles

For triangle, base = 13 in, height = 7 1/4 in, = 29/4 in

Area- 1/3 x base x height = 1/2 x 13 x 29/4 in. 2

= 37/4 in. 2

= 94.25 sq. in

The predicted attendance if Temperature is 90 degrees will be 9750.

From the information given, the attendance at a baseball game is to be predicted by the equation Attendance = 16,500 − 75 Temperature.

The predicted attendance will be:

= 16500 - 75(90)

= 16500 - 6750

= 9750

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Answer:

Area = 261

Step-by-step explanation:

(28 x 7) + (10 x 13)/2. Solve 196 + 65 = 261

Answer is    C                    

I hope this halped you

Answer:

  C.  f(x) > g(x) for x > 2

Step-by-step explanation:

Using a graph is probably the easiest way to compare an exponential function with a polynomial function. There are no algebraic methods for finding points of intersection. ("Trial and error," or "table of values" will work.)

A graph of these two functions shows f(x) > g(x) except on the interval [1, 2]. That is, f(x) > g(x) for x > 2.

Answer: [tex]\frac{23}{7}[/tex]

Step-by-step explanation:

    An improper fraction is a fraction with the wholes / ones in the numerator.

3 [tex]\frac{2}{7}[/tex]

3 * 7 = 21

21 + 2 = 23

[tex]\frac{23}{7}[/tex]

Answer:

23/7

Step-by-step explanation:

You multiply 7 times 3 which equals 21 then add 2 and get 23 you leave yor denominator the same.

So you multiply your denominator by your wole number then add the whole number (21) by your numerator (2) and leave your denominator (7) as it is.

Answer:

Rectangle B

Step-by-step explanation:

Rectangle A:

L × B

3.25 × 6.1

19.825 inches

Rectangle B:

L × B

4.06 × 5.009

20.33654

Answer:

  a) 160 meters short

  b) d = 200x +80y

  c) (run, walk) = (2, 15), (4, 10), (6, 5)

  d) see attached

Step-by-step explanation:

You're being asked to write an equation describing the gym class requirement, and to find several values of the variables that satisfy the equation.

It is convenient to write the equation first (part b).

__

At 200 meters per minute, in x minutes, Eric will run 200x meters. At 80 meters per minute, Eric will walk 80y meters in y minutes. His total distance covered will be ...

  d = 200x +80y

__

In the given times, Eric's distance covered is ...

  d = 200(4) +80(8) = 800 +640 = 1440 . . . meters

Eric is 160 meters short of the 1600-meter goal.

__

It is convenient to simplify the equation to one that lets us find one value in terms of the other.

  200x +80y = 1600

  5x +2y = 40 . . . . . . . . divide by 40

This will have integer solutions for even values of x in the range 0 to 8.

  y = (40 -5x)/2

For x={2, 4, 6}, we have ...

  y = (40 -5{2, 4, 6})/2 = {30, 20, 10}/2 = {15, 10, 5}

Eric can cover 1600 meters in (run, walk) times of ...

  (run, walk) = (2, 15), (4, 10), (6, 5)

__

The graph is attached. We'll let you read as many values from it as you may wish.

Answer:

39 sq m

Step-by-step explanation:

Since it asking for area:

Formula for area: A = Lw {Length x Width}

Thus,

A =wl = 3·13=39

We can also do

13 + 13 + 13 = 39

Hence, Answer is 39 sq m

~lenvy~

Answer:

C

Step-by-step explanation:

0.24 is the same as 24 hundredths.

0.4 is the same as 4 tenths or 40 hundredths.

Answer:

10 tenths make a one

Step-by-step explanation:

because it works like dimes making a dollar you need 10 of them to make a dollar, and they are in the tenths position.

Answer:

ten tenths

Step-by-step explanation:

10/10 = 1

Hope this helps

Answer:

base(b)=10 and height(h)=6

Step-by-step explanation:

From the question,

base(b)=x feet

height(h)=(x-4) feet

Area(A)=30 square feet

Now,

We know,

Area of triangle(A)=1/2*b*h

or, 30=1/2*x*(x - 4)

or, 30=1/2*x^2 -4x

or, 30*2=x^2 -4x

or, 60=x^2 -4x

or, 0 = x^2 -4x -60

or, 0 = x^2 +6x - 10x -60

or, 0 = x(x + 6) -10(x + 6)

or, 0 = (x+6) (x-10)

Either,

x+6=0. or, x-10=0

or,x= -6. or, x= 10

Since, the base of the triangle can not be negative number then, x≠ -6feet but x=10feet

Lastly,

Height(h)=X - 4

=10 - 4

=6 feet

Answer:

the median i think is th 4.3 that is in the front and the 4.3 in the back because they are look like same numbers to me so thx

Step-by-step explanation:

pls brainly me of my answer

that the median the 2 4.3 ok

Answer:

4.1

Step-by-step explanation:

1) if to sort the given sequence to the largest term, then

3.3; 3.8; 3.8; 4.0; 4.2; 4.3; 4.3; 4.3.

2) the midpoint between 4.0 and 4.2 is 4.1, it means the median is 4.1.

Answer:

2:30 PM

Step-by-step explanation:

3 1/2 hours after 11 am is 2:30 pm.

Answer:

coplete the table by filling in the estimated and actual elapsed time.

Answer:

106

Step-by-step explanation:

The analysis shows there is a correlation between income and phone usage. There may or may not be causation. Further studies would have to be done to determine this.

Correlation is a statistical measure used to measure the relationship that exists between two variables. It is used to measure the direction of change in one variable when there is a change in another variable.

Causation is when a change in one variable leads to another change in the other variable.

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