an examination class of 55% of pupil scored 70% , if 54 scored above 70%. how many scored above 70%.​

Given:

A figure of a right triangle.

To find:

The value of x.

Solution:

According to the geometric mean attitude theorem, if an altitude is drawn from the right angle vertex to the hypotenuse, then the altitude is the geometric mean of segments of hypotenuse.

Using geometric mean attitude theorem, we get

[tex]\dfrac{3}{x}=\dfrac{x}{5}[/tex]

[tex]3\times 5=x\times x[/tex]

[tex]15=x^2[/tex]

[tex]\pm \sqrt{15}=x[/tex]

But side cannot be negative. So,

[tex]\sqrt{15}=x[/tex]

Therefore, the value of x is [tex]\sqrt{15}[/tex].

Answer:

[tex]f^{-1}(x) = \frac{x+8}{8}[/tex]

Domain of f(x): All real values.

Range of f(x): All real values.

Domain of f -1(x): All real values.

Range of f -1(x): All real values

Step-by-step explanation:

We are given the following function:

[tex]f(x) = 8x + 8[/tex]

Since it is a line, we have that both the domain is the range is the real set.

Inverse function:

The domain of the inverse function is the range of the original function, and the range of the inverse function is the domain of the original function.

Finding the inverse function:

Exchange x and y in the original function, and isolate y. So

Original

[tex]y = 8x + 8[/tex]

Exchanging:

[tex]x = 8y - 8[/tex]

Isolating y:

[tex]8y = x + 8[/tex]

[tex]y = \frac{x+8}{8}[/tex]

[tex]f^{-1}(x) = \frac{x+8}{8}[/tex]

Answer:

Well her mistake is she didn't subtract correctly

Step-by-step explanation:

Her answer is supoose to be 572.75

Answer:

She lined the decimals wrong (common mistake)

Step-by-step explanation:

The correct answer is 572.75

Answer:

k = 0.381cm/gallon

Step-by-step explanation:

Let the amount a tree grows in one month be x

Let amount of water it is given be y

If the amount a tree grows in one month is directly proportional to the amount of water it is given, then;

x ∝ y

x = ky

k is the constant of proportionality

k = x/y

Given

x = 8cm

y = 21 gallons

k = 8/21

k = 0.381cm/gallon

Answer:

Step-by-step explanation:

Todo numero natural es entero?

Answer:

A.

Step-by-step explanation:

To get to 180. You need to subtract 134 from 180:

180

134-

Which would give you 46.

I hope this is right.

ANSWER:the size of reflex angle is

C:314 degrees

Answer:

40,009.88

Step-by-step explanation:

The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle.

were given the radius, r=6371

diameter = r x 2

6371 x 2 = 12742

12742 = diameter

12,742 x 3.14 = 40,009.88

Answer:

40,030.173592041 km

Step-by-step explanation:

circumference of a circle = 2πr

=2 × π × r

=2 × π × (6371)

=40,030.173592041

Answer:

it's A because all of those numbers are less than 14

Step-by-step explanation:

Answer:

10a. No

10b. No

10c. Yes

10d. Yes

Step-by-step explanation:

10a. This equation does not because 3/4 x 8 = 6 and not 9.

10b. This equation doesn’t because 3x8 does not equal 28.

10c. This equation does because 5 x 8 = 40 which means y = 8.

10d. This equation does because 8/2 = 4. Fractions are just division problems and 8 divided by 2 equals 4, meaning y = 8 was n this equation.

Answer: C

Step-by-step explanation:

Since the points are ( -3,4 ) it passes through 4 in the y axis.

Meaning it will pass through 4 which is C.

Answer:

y = 4

Step-by-step explanation:

Answer:

$544.73

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra I

Simple Interest Rate Formula: [tex]\displaystyle A = P(1 + r)^t[/tex]

Step-by-step explanation:

Step 1: Define

A = 960

r = 0.12

t = 5

Step 2: Solve for P

The probability that the first ball drawn is red and the second ball drawn is blue is 3/20.

The probability that the first ball drawn is red and the second ball drawn is blue, we need to multiply the probability of drawing a red ball on the first draw by the probability of drawing a blue ball on the second draw.

Given that there are 10 balls in total, with 5 red balls and 3 blue balls, the probability of drawing a red ball on the first draw is 5/10 = 1/2.

Since the ball is replaced after the first draw, the total number of balls remains the same for the second draw.

The probability of drawing a blue ball on the second draw is also 3/10.

To find the probability of both events occurring (the first ball being red and the second ball being blue), we multiply the probabilities:

Probability = (Probability of drawing a red ball) × (Probability of drawing a blue ball)

= (1/2) × (3/10)

= 3/20

For similar questions on probability

https://brainly.com/question/25839839

#SPJ8

Answer:

No

Step-by-step explanation:

Because the first problem has parenthesis that means you do what's in the parenthesis first but the second problem is just laid out so use PEMDAS.

So The 1st answer would be 9 and the 2nd 15.

Answer:

They do not have the same answer

Step-by-step explanation:

You have to use

Parenthesis

Exponents

Multiplication

Division

Addition

Subtraction

(12+6)  ÷ 2                  12 + 6  ÷ 2

  18  ÷ 2                       12 +  3

   9                                 15

Hope that helps

Answer:

[tex]x = 24\ degrees[/tex]

Step-by-step explanation:

Given

16 degrees = 10 hours

Required

Determine the change over 16 hours

Let the change be represented with x,

So, we have:

16 degrees = 10 hours

x = 15 hours

Cross Multiply:

[tex]x * 10\ hours = 16\ degrees * 15\ hours[/tex]

[tex]x * 10 = 16\ degrees * 15[/tex]

Divide through by 10

[tex]x = \frac{16\ degrees * 15}{10}[/tex]

[tex]x = 16\ degrees * 1.5[/tex]

[tex]x = 24\ degrees[/tex]

Answer:

900 large boxes were sold, and 750 small boxes.

Step-by-step explanation:

This question can be solved by a system of equations.

I am going to say that:

x is the number of large boxes of cookies sold.

y is the number of small boxes of cookies sold.

A total of 1,650 boxes of Girl Scout cookies were sold last week.

This means that

[tex]x + y = 1650[/tex]

So

[tex]x = 1650 - y[/tex]

Each large box cost $3.50 and each small box cost $2.00. The Girl Scout group earned $4,650.

This means that

[tex]3.5x + 2y = 4650[/tex]

Since [tex]x = 1650 - y[/tex]

[tex]3.5(1650 - y) + 2y = 4650[/tex]

[tex]5775 - 3.5y + 2y = 4650[/tex]

[tex]1.5y = 1125[/tex]

[tex]y = \frac{1125}{1.5}[/tex]

[tex]y = 750[/tex]

[tex]x = 1650 - y = 1650 - 750 = 900[/tex]

900 large boxes were sold, and 750 small boxes.

Answer:

16

Step-by-step explanation:

One basket takes (1/4)th of the shelf.

So, in one shell, Cindy can place 4 baskets

Total number of baskets = 4 *4 = 16

Answer:

This is the answer

Step-by-step explanation:

You needed to multiple 5 to both sides

Answer:

14.3

Step-by-step explanation:

What you would do is add all 6 numbers together. After finding the sum, divide by 6. The 6 represents the amount of numbers in the data set. So you would find 86/6 and get 14.3333. That would be rounded to 14.3. Hope this helped!

Answer:

pam has x = 7 pennies

sam has 2x + 1 = 14 + 1 = 15 pennies

Step-by-step explanation:

let's take the number of pennies that pam owns be x

sam's pennies = 2× ( pam's pennies ) + 1

=》2x + 1

if the total pennies owned by both = 22

then,

x + 2x +1 = 22

3x = 22 - 1

x = 21 ÷ 3

x = 7

so, pam has x = 7 pennies

sam has 2x + 1 = 14 + 1 = 15 pennies

Answer:

888888

Step-by-step explanation:

Is the right answer

Answer:

1222221

Step-by-step explanation:

222222+999999

Start from the ones place, 2+9=11 (11)

Borrow 1, 2+9=11+1=12 (21)

Again, 2+9=11+1=12 (221)

Again, 2+9=11+1=12 (2221)

Again, 2+9=11+1=12 (22221)

And again, 2+9=11+1=12 (1222221)

Hope I helped! Good Luck!

Answer:

1/4

Step-by-step explanation:

Divide 8 by 2

2/8 = 1/4

good luck, i hope this helps :)

Answer:

Step-by-step explanation:

The height of the heater is about 89.3 in.

You can solve this problem with the Pythagorean Theorem. The base is a square. So half way across the middle will the right under the tip of the pyramid. We can use the measurement with the slant height to write and solve the equation below.

23.8^2 + x^2 = 90.1^2

x will be about 89.3.

Mark brainliest please if the answer is correct

Answer:

-18x^2 -54x + 72

Step-by-step explanation:

Step-by-step explanation:

heyy, what math do u need help with I can probably help

Answer:

bestie whats the question