Mathematics High School

If you take a certain number 2.5 times then add 1.75 and divide the result by 0.8, you’ll get 37.5. What was the original number?

Please show how you did it!

Answers

Answer 1
The answer is 11.3. You just take all the directions and you do the opposite operation. 

Work

Step 1 - 37.5 x 0.8 = 30

Step 2 - 30 - 1.75 = 28.25

Step 3 - 28.25 divided by 2.5 = 11.3.

Step 4/ Final Answer - 11.3




Answer 2
 lets take the certain number and call it 'x'
take 2.5 of the number = 2.5x
when we add 1.75 -   2.5x + 1.75
and divide by 0.8  -    (2.5x+ 1.75)/0.8
the answer is 37.5
lets construct an equation with this information
(2.5x + 1.75)/0.8 = 37.5
2.5x + 1.75 = 37.5* 0.8
2.5x = 30 - 1.75
2.5x = 28.25
x = 28.25/2.5
x = 11.3

Related Questions

2/5 of the children in a club are girls,if there are 24 boys,how many children are there altogether?how many more boys than girls are there

Answers

2/5 are girls, therefore 3/5 are boys

3/5 = 24
1/5 = 24 ÷ 3 = 8
2/5 = 8 x 2 = 16

Altogether = 16 + 24 = 40 

24  - 1 6 = 8

There are 40 children altogether
There are 8 more boys than girls.


8 More Boys

2/5 = 16/40
24 = 3/5

24 - 16 = 8

Therefore, There Are 8 More Boys Than Girls.

There is an old riddle about a frog at the bottom of a 20-foot well. if he climbs up 3 feet each day and slips back 2 feet each night, how many days will it take him to reach the 20-foot mark and climb out of the well?

Answers

For this case what we are going to do is write step by step the equation of the line
 f (x) = mx + b
 We have:
 20-foot well:
 f (x) = mx + 20
 if he climbs up 3 feet each day and slips back 2 feet each night:
 f (x) = - 3x + 2x + 20
 f (x) = - x + 20
 When it reaches 20 feet we have f (x) = 0:
 f (x) = - x + 20
 0 = -x + 20
 x = 20 days.
 Answer: 
 It will take him 20 days to reach the 20-foot mark and climb out of the well

ALGEBRAIC PROOF PLEASE HELP IT IS MY LAST QUESTION I AM STUMPED
Use the following problem to answer the question below:

Given: 3(x – 4) = 33
Prove: x = 15

3(x – 4) = 33 Given

3x – 12 = 33 A

3x – 12 + 12 = 33 + 12 B

3x + 0 = 45 C

3x = 45 D

x = 15 Division Property of Equality

What is the reason for D?

Answers

3x +0 can be replaced by 3x because of "the additive identity property of real numbers: anything plus zero is that thing."

Find the prime factorization of 60

Answers

The answer is the bottom one because you always use exponents if there are 2 or more of the same prime number.
Hey there! 

[tex]2(2) = 4(3) = 12(5) = 60 [/tex]

[tex]2^2 =4 = 4(3) =12(5) = 60 [/tex]

They are both prime factorization of [tex]60[/tex] 

But, if you had to choose one then pick:[tex] 2*2*3*5[/tex] (the first option) 

Good luck on your assignment and enjoy your day!

~LoveYourselfFirst:)

Carson’s estimate for the cost of tiling his bathroom floor is $25 plus $5 per square foot. He says that he can model the cost with a linear function. Is Carson correct? Why or why not?

Answers

Carson is correct.
 Let's write the variables first.
 Let:
 x = number of square feet of the bathroom floor.
 y = total cost in $.
 The function that best suits the problem is:
 y = 5x + 25
 Answer:
 Carson is correct.
 y = 5x + 25

Two tons of water is pumped into a tank 15 ft. high in 5 minutes. Determine the power output of the pump.

Answers

Answer:

  0.364 horsepower

Step-by-step explanation:

You want to know a pump's power output if it raises 2 tons of water 15 ft in 5 minutes.

Power

The power is conveniently measured in horsepower. One horsepower is 33,000 ft·lb/minute.

Here, we have (2t · 2000 lb/t · 15 ft)/(5 min) = 12000 ft·lb/min

In terms of horsepower, that is ...

  (12000 ft·lb/min) / (33000 ft·lb/min/hp) = 4/11 hp ≈ 0.364 hp

The power output of the pump is about 0.364 horsepower.

__

Additional comment

That's about 271 watts.

The distance dimensions are in feet, so we assume the tons are US short tons of 2000 lb each.

solve 30 - 9.8x

A.) x = 39.8
B.) x = 20.2
C.) x = 3.06
D.) x = 0.33

Answers

30 - 9.8x
x = 30 / 9.8
x = 3.06

Answer is C

Answer: x = 3.06

Step-by-step explanation:

You do 30 divided by 9.8 and you get 3.06

The angle of depression from the top of a flag stick to a golf ball on the ground is 24 degrees. If the flagstick is 6 feet tall, how far away is the golf ball from the base of the flag stick?

A. 13.5 ft
B. 12.3 ft
C. 9.8 ft
D. 14.6 ft
E. 15.1 ft

Answers

check the picture below.

make sure your calculator is in Degree mode.

Answer:

The Golf ball from the base of the flag stick is 13.5 ft

A is correct.

Step-by-step explanation:

Please see the attachment for figure.

Let AB is height of flag stick. AB=6 ft

BC is distance of golf ball from base of the flag stick.

In ΔABC, ∠B=90°

[tex]\dfrac{AB}{BC}=\tan 24^\circ[/tex]

[tex]\dfrac{6}{BC}=0.4452[/tex]

[tex]BC=13.5[/tex] ft

Hence, The Golf ball from the base of the flag stick is 13.5 ft

The blue figure is a dialation image of the black figure. The labeled point is the center of dilation. Tell wheaten the dilation is a enlargement or a reduction. Then find the scale factor of dilation

Answers

The dilation's scale factor will be 1/4.

The division method is used to divide a bunch of items into equal portions.

Division is the inverse of multiplication. For instance, dividing 20 by 2 means dividing 20 into two equal groups of ten.

Given this,

The blue figure is a magnified version of the black one.

Furthermore, the origin is the center of dilatation.

Now,

Because the blue figure is a dilatation of the black one.

Furthermore, the origin is the center of dilatation.

In this case, the length of the black figure equals 16 units.

Furthermore, the length of the blue figure equals 4 units.

As a result, the dilation scale factor is 4/16.

= 1/4

The area of a rectangle is 9.312 x 104 cm2 and the width is 2.56 x 102 cm. What is the length? A) 3.6375 x 102 B) 3.6375 x 106 C) 6.752 x 102 D) 6.752 x 106

Answers

Area = length*width
length = Area/width
  = (9.312*10^4)/(2.56*10^2) = 3.6375*10^2 . . . cm

Selection A is appropriate.

_____
You already knew that before you even touched your calculator. 10^4/10^2 = 10^2, so only answers A and C should be considered. 9.3/2.6 < 4.5, so only answer A should be considered.

The beauty of scientific notation for numbers is it helps you estimate the result of multiplication and division easily. For many problems, you don't need the actual answer as much as you need the ballpark in which the answer resides.
Answer:  B, 3.6375 x 10^2

Step-by-step explanation:

For USATestprep people.

what is the classification for this polynomial?

4

Choices:
A. Monomial
B. Binomial
C. Trinomial

Answers

well, is just a number 4 all by its lonesome, just a bare constant in this case, however, that makes it a "term".

a polynomial can be name by how many terms in it, POLYnomial, POLY=many,  now, this is just one, MONO=one, MONOmial.

what is the solution to the proportion 3/m=12/15

Answers

b 3.75 it is simple it is easy 
the answer 3.75 i think 

A quarter circle is attached to the side of a square as shown.

What is the best approximation for the area of this figure?

Use 3.14 to approximate pi.


28.6 m²

41.1 m²

66.24 m²

116.5 m²



Answers

The area of the square is s×s
 = 4×4 = 16 m²
The area of a quarter circle is (πr²)/4
    = 3.14 × 16/4
    = 3.14 ×4
    = 12.56 m²
Therefore, the total area is;
     = 16 +12.56
     = 28.56 m²
     ≈ 28.6 m²
-TalibShaheed
The area of the square is YxY
 = 4×4 = 16 m²
The area of a quarter circle is (πr²)/4
    = 3.14 × 16/4
    = 3.14 ×4
    = 12.56 m²
That means, the total area is:
     = 28.56 m²
Or it will be about:
     ≈ 28.6 m²
Hope it helped!
-Gabrielle



A) –6n + 2mn – 25np

B) –6n + 2m – 25np

C) –6n – 2mn + 25np

D) –24n + 8mn – 100np

Answers

1/4 n(-24 + 8m - 100p) = -6n + 2mn - 25np (Answer A)
Hey there! 

Since we have different variables and we CANT combine our like terms of this problem, we would have to do them separately (but multiply everything by [tex] \frac{1}{4} n[/tex] ) 

[tex] \frac{1}{4} n (-24 + 8m - 100p )[/tex]

[tex] \frac{1}{4}n(-24) \\ \\ \\ \frac{1}{4}n (8m) \\ \\ \\ \frac{1}{4} n (100p)[/tex]

Your answer: [tex]-6n + 2mn + 25np[/tex] ( option A. seem closer) 
 
Good luck on your assignment and enjoy your day!

~[tex]LoveYourselfFirst:)[/tex]

Brian has reduced his cholesterol level by 16% by following a strict diet and regular exercise. If his original level was 260, what is his approximate cholesterol level now?

Answers

Original amount (260) subtracted by original amount times percent drop (16%).

=260 - (260 * 16%)
=269 - (260 * 0.16)
=260 - 41.6
=218.4 new cholesterol level

ANSWER:
His new cholesterol level is 218.4.

Hope this helps! :)

Answer:

218.4

Step-by-step explanation:

The price of a share of stock started theday at $37. During the day it went down $3, up $1, down $7, and up $4.What was the price of a share at the end of the day?

Answers

$32  because 37-4+1-7+4=32
it went up $5 total but went down $10 so you take the base number and subtract 5 from it
(because 10-5=5)
so the answer is $32

How many possible outcomes would there be if three coins were each tossed once?

Answers

the answer is 6 because there is only 2sides to a coin and there are three coins so you would times 3by 2

If two polygons are similar then the corresponding sides are equal and the corresponding angles are proportional. True or False?

Answers

We can say that two polygons are similar if they have the same shape as the other but they are jut different in size. Even when the other polygon is flipped over or rotated, the shape still remains similar. Two polygons are considered similar only if their corresponding sides are proportional and their angles must be congruent. 

If the question is phrased like that however, your answer would be false because the sides are not equal, they are proportional. The angles are not proportional, they should be congruent or equal.

Which expression is equivalent to (b^n)^m

Answers

C
When the exponents are set up like that you multiply them. 

Answer:

C. [tex]b^{n\cdot m}[/tex]

Step-by-step explanation:

We have been given an expression [tex](b^n)^m[/tex]. We are asked to find the equivalent expression to our given expression.

Using exponent property [tex](a^b)^c=a^{b\cdot c}[/tex], we can write our given expression as:

[tex](b^n)^m=b^{n\cdot m}[/tex]

Therefore, option C is the correct choice.

What is 0.673 rounded to the nearest hundredths

Answers

Your answer will be 0.67

Hope this helps

0.673 rounded to the nearest hundredth as 0.67

The digit in the smallest location is unaffected if it is less than 5 in number. Rounding down is the process of reducing a number to zero after a certain number of digits. The digit in the smallest location is added with +1 if it is bigger than or equal to 5.

To round off 0.673 to the nearest hundredth means hundredth digit after decimal, To do so take a look on the thousandth digit after decimal, If it is greater than 5 or equal to 5 increase the hundredth digit after decimal by 1 otherwise no change,

Here, the thousandth digit is 3, 3<5. So, no increment is required.

It will remain as 0.67.

Thus, 0.673 is 0.67 after rounding off to the nearest hundredth.

Learn more about round off, here:

brainly.com/question/31754034

#SPJ6

solve proportion 12/p = 36/45

Answers

12 x 45 / 36 is 15. p=15

△ XYZ∼ △ DEF, YZ is 10 meters, ​ XZ ​ is 15 meters, and EF is 8 meters. What is ​ DF?

Answers

im not for sure on this but i would say DF is 13

△ XYZ∼ △ DEF, YZ is 10 meters, ​ XZ ​ is 15 meters, and EF is 8 meters. What is ​ DF?

Solution:

As, △ XYZ∼ △ DEF , so the ratio of sides of triangle is equal.

So, we have, [tex] \frac{XY}{DE} =\frac{YZ}{EF} =\frac{XZ}{DF} [/tex]

Using, [tex] \frac{YZ}{EF} =\frac{XZ}{DF} [/tex]

So, we get,[tex] \frac{10}{8} =\frac{15}{DF} [/tex]

Now, to solve for DF, we must simplify

Simplifying,[tex] \frac{10}{8} =\frac{5*2}{4*2}=\frac{15}{DF) [/tex]

[tex] \frac{5}{4} =\frac{15}{DF} [/tex]

To simplify, Let us multiply by 4*DF on both sides

[tex] \frac{5*4DF}{4} =\frac{15*4DF}{DF} [/tex]

[tex] \frac{5DF}{1} =\frac{15*4}{1} [/tex]

So, 5 DF=15*4=60

To solve for DF, let us divide by 5 on both sides

[tex] \frac{5}{5} DF=\frac{60}{5} [/tex]

[tex] \frac{1}{1} DF=\frac{12}{1} [/tex]

So, DF=12meters

What is the sum of the geometric series: 
3
∑5(-2/3)^i
i=0

Answers

We use the law of the sum of the 3 first terms of the geometric sequence:
[tex]\sum_{i=0}^35\left(\dfrac{-2}{3}\right)^i=5\dfrac{1-\left(\dfrac{-2}{3}\right)^4}{1-\left(\dfrac{-2}{3}\right)}\\=5\dfrac{\left(\dfrac{3^4-2^4}{3^4}\right)}{\left(\dfrac{5}{3}\right)}\\=3\left(\dfrac{65}{81}\right)=\dfrac{65}{27}[/tex]

Can someone please explain this to me? I keep getting -infinity as the answer.

Answers

There is an indeterminate form: infinity/infinity. To solve it, you can use the infinite comparison method. First, you have to identify which has the highest degree term: whether the numerator or the denominator. In this case, it is the numerator, which has the negative term of degree 4: -7x ^ 4. Then, the result is -∞.

 Therefore, the answer is the last option: Does not exist.

which term describes the red curve of the figure below?

Answers

A. Hyperbola
Hyperbola is where there are two curves (one up, one down)

Answer:

A) Hyperbola.

Step-by-step explanation:

Given : Figure .

To find : Which term describes the red curve of the figure below.

Solution : We can see from the given figure two red curve  up and down .

Hyperbola : A hyperbola is two curves that are like infinite bows.

Therefore, A) Hyperbola.

helppppppppppppppppppppp

Answers

What you should keep in mind in this case is:
 1) Trigonometric functions.
 2) rewrite the expression
 3) Cancel similar terms.
 Note: See attached image.
 Answer:
 Cot(x)
 option 2

a fair cube is used in a game . the face of the cube are labeled 1 through 6 . what is the probability of a player rolling a number grater than 4 ?

Answers

There are six equally possible outcomes to get: 1, 2, 3, 4, 5, 6. The probability to roll a number greater than 4 is equal to the probability to get 5 or 6, two of the six possible outcomes. Thus the probability is 2/6=1/3.

Choose the right answer. If the distance on a map from point R to point T measures 3.0 inches and the scale is 1 inch = 0.5 miles, what is the distance in miles from point R to point T? ______ miles
A. 6.0
B. 3.0
C. 1.5

Answers

The answer is c because when you multiply 3.0 by 0.5 I️t gives you 1.5

Answer: The distance from point R to point T is 1.5 miles.

Step-by-step explanation:

In the map, the scale is,

1 inches = 0.5 miles,

3 inches = 3 × 0.5 = 1.5 miles,

Thus, in the map 3 inches shows 1.5 miles,

Since, in the map, the distance from point R to point P = 3 inches,

Thus, the actual distance from point R to point P = 1.5 miles.

⇒ Option C is correct.

what is the domain of the function y=3sqrt(x)

Answers

y=3sqrt(x)

x≥0

Because every number in the domain must yield real number outputs, set what is in the radical greater than or equal to 0.
ANSWER

The domain of the function

[tex]y = 3 \sqrt{x} [/tex]
is
[tex]x \geqslant 0[/tex]


EXPLANATION


The domain of a function refers to all values of x for which y is defined.



Since this is a square root function, we need to keep the expression under the square root sign to be greater than or equal to zero.



As soon as the expression under the root sign is less than zero, the function will not be defined.


This means that the square root of a negative number will not be a real number.



Thus the domain is
[tex]x \geqslant 0[/tex]


or

[tex][0, \infty )[/tex]

The measures of two of the angles in a triangle are green. Find the measure of the thirs angle. Show your calculations to support your answer.
5-8?

Answers

In a triangle, the three interior angles always add to 180°

5
m∠3 = 180 - 126.5 - 19 = 34.5°

6
m∠3 = 180 - 65.5 - 85 = 29.5°

7
m∠3 = 180 - 98.3 - 37.5 = 44.2°

8
m∠3 = 180 - 31 - 113 = 36°
Angles in a triangle add up to 180°. 
So all we have to do is subtract the 2 angles we know from 180:

For question 5, we subtract 126.5° and 19° from 180°:
180 - 126.5 - 19 = 34.5°

The same principle applies for the rest.

Question 6:
180 - 65.5 -85 = 29.5°

Question 7:
180 -98.3 -37.5 = 44.2°

Question 8:
180 - 31 - 113 = 36°

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