Mathematics Middle School

A pond has 60 fish
27 were carp and the rest were tench
10 fish were added
The probability that a fish picked at random is a carp is now 1 half
How many tench were added?

Answers

Answer 1
2 trench fish and 8 carp fish
Answer 2
2 tench fish were added. 
in total there are 70 after the 10 added. the probability of getting a carp is 1 half so divide 70 by 2 to see how many carp there are. 70/2 = 35. so right now there are 35 carp and 35 tench. Now, before the 10 were added, there was 60 fish and 27 were carp. So subtract 27 from 60 to know how many tech fish there was. 60 - 27 = 33. There was 33 tech fish and from 33 to 35 goes 2. So 2 tench fish were added.

Related Questions

Mark earns $135 for selling a $1,500 refrigerator. Which sale listed has the same commission rate? A) $36 commission on a $400 dryer sale B) $40 commission on a $500 dryer sale Eliminate C) $210 commission on a $1,400 oven sale D) $30 commission on a $600 freezer sale

Answers

$36 commission on a $400 dryer sale. Then the commission rate will be 0.09. Then the correct option is A.

What are ratio and proportion?

A ratio is a group of sequentially ordered numbers a and b expressed as a/b, where b is never equal to zero. When two objects are equal, a statement is said to be proportional.

Mark procures $135 for selling a $1,500 fridge.

The commission rate remains constant. Then the commission rate is given as,

Commission rate = 135 / 1500

Commission rate = 0.09

Let's check all the options, then we have

A)  $36 commission on a $400 dryer sale. Then the commission rate is given as,

Commission rate = 36 / 400

Commission rate = 0.09

$36 commission on a $400 dryer sale. Then the commission rate will be 0.09. Then the correct option is A.

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PLEASE HURRY, I NEED THE ANSWERS!!
1. The surface area of a box is 627in, what is the surface area if it is scaled by a factor of ten? (Show work)
2. The volume of the box is 720in, what is the volume of the box if it is scaled by 1/10? (Show work)

Answers

Can i have a picture?

How is the expression (5 + y) ⋅8 described by its factors and terms?

It has two factors and the factor (5 + y) has one term.
It has three factors and the factor (5 + y) has one term.
It has three factors and the factor (5 + y) has two terms.
It has two factors and the factor (5 + y) has two terms.

Answers

Answer: Choice D
It has two factors and the factor (5+y) has two terms

=========================================================
Explanation:

(5+y)*8 is in the form P*Q where
P = 5+y
Q = 8
So we have two factors multiplied together. A factor is simply a number that helps multiply to a larger one. Another example: 14 has the factors 7 and 2 because 7*2 = 14

The factor 5+y has two terms which are 5 and y. The terms are separated by a plus sign. If you had something like 5-y, then you can write it as 5+(-y) and you'd still have two terms.

Answer:

D It has two factors and the factor (5 + y) has two terms

Step-by-step explanation:

Did the test

Hope you have a wonderful day :)

Good luck on your test :D

Can someone help me find the volume

Answers

the correct volume is 56 in^3
the answer is 56 in squared.

lcm of (x-2)(x+3) and 10(x+3)^2

Answers

Least common multiple: factor them, then see what they have in common and what is leftover and multiply those expressions:

(x - 2)(x + 3)          10(x + 3)(x + 3)
Common: (x + 3)
Leftover: (x - 2), (10), (x + 3)
Common · Leftover is: (x + 3) · (x - 2) · (10) · (x + 3) = 10(x - 2)(x + 3)²

Answer: LCM is 10(x - 2)(x + 3)²


HURRY PLZ!!!!!!!!!!!The cafeteria uses rectangular trays with a raised edge around them. The area of the flat surface of each tray is 228 and its length is 19 inches. What is the perimeter of the tray, where the raised edge is? To find the width, use the formula , where w represents the width, A represents the area and l represents the length. To determine the perimeter, use the formula , where P represents the perimeter, l represents the length, and w represents the width

Answers

62 inches. 

2*(19+228/19)=62

Hope this helps!

Answer:

62 inches

Step-by-step explanation:

plz mark brainliest

fred has 10 coins in a book bag. He has 4 quarters, 1 penny, and 5 dimes. If Fred reaches into his book bag and draws a coin without looking, what is the probability that he will draw a quarter?

Answers

4/10  or 2/5
there is 4 possible items he needs to pull out of of 10 possible coins
It would probaly be a dime.

help plz 5 points! plzz

Answers

4. This quadrilateral is a rectangle.
5. 1/2 gallon ---- 64 f. ounces,        1/2*2 gallon ---- 64*2 f. ounces,
                                                               1 gallon -128 oz
   160 *8=1280 oz in 160 glasses

1280 oz*1 gallon/128 oz =10 gallons

A quadrilateral with 4 equal angles but not 4 equal sides is a rectangle.


Simplify ten to the sixth divided by ten to the negative third.

Answers

Exponential rules state that when you divide exponents, you subtract by the powers. The powers have the same coefficients, so you can divide the two numbers.

6 - (-3) = 9

The answer is [tex]10^9[/tex].
10⁶ ÷ 10⁻³

10⁶ = 10 × 10 × 10 × 10 × 10 × 10 = 1,000,000

10⁻³ = 1/1000 = 0.001

1,000,000 / 0.001 = 1,000,000,000

Answer = 1,000,000,000 = 10⁹

~Hope this helped~

The larger leg of a right triangle is 3 cm longer than its smaller leg. The hypotenuse is 6 cm longer than the smaller leg. How many centimeters long is the smaller leg?

Answers

Final answer:

To find the length of the smaller leg of the right triangle, we can use the Pythagorean theorem and solve the equation.

Explanation:

Let x be the length of the smaller leg of the right triangle. The larger leg is 3 cm longer, so its length is x + 3. The hypotenuse is 6 cm longer, so its length is x + 6.

According to the Pythagorean theorem, which states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides, we have the equation: x^2 + (x + 3)^2 = (x + 6)^2.

Solving this equation will give us the value of x, which is the length of the smaller leg.

I dont know how to set it up. #20 solving equations with variables on both sides.

Answers

First lets create an equation for each:

1) Cost = 5x + 60
2) Cost = 11x

Where x is the number of lessons.

Since we want to find the value of x (the number of lessons), we can set both equations equal to each other:

5x + 60 = 11x

Subtract 5x from both sides:

60 = 6x

Divide by 6:

x = 10
So it will take 10 lessons till a member and a nonmember pay the same amount.

There are 60 office suites in a downtown building. For how many office suites does company C service the computers? -Company A services the computers at 1/3 of the office suites -Company B services the computers at 2/5 of the office suites

Answers

Company C services 16 office suites.

Company A services 1/3 of the suites and Company B services 2/5; together they service 1/3+2/5.  Find a common denominator; 15 is the smallest:

1/3=5/15
2/5=6/15

5/15+6/15 = 11/15

This means that 1-11/15 = 4/15 of the suites are serviced by Company C.

4/15 of 60 = 4/15(60) = 4/15(60/1) = 240/15 = 16

Answer:

16

Step-by-step explanation:

Dilation ( effects of changing dimensions on perimeter and area)

A company that makes square tiles would like to make a square tile that has 4 times the area of their smaller tiles. if their smaller tiles have a perimeter of 16 inches. What will be the perimeter of their larger tile?

A- 8 in.
B- 32 in.
C- 64 in.
D- 256 in.

Answers

Final answer:

To make a tile with four times the area, the side length of the square is doubled. Thus, the perimeter of the larger tile, which is four times the side length, will be 32 inches.

Explanation:

The student is asked to determine the perimeter of a larger square tile if the company wishes to increase the area by 4 times, using a smaller square tile with a perimeter of 16 inches as a reference. The side of the smaller square tile can be calculated by taking the perimeter and dividing it by 4, which equals 4 inches. If we want a square with 4 times the area, it means that each side is doubled, therefore the length of the side of the larger square is 2 x 4 = 8 inches. To find the perimeter of the larger square, we multiply the side length by 4 (since a square has four equal sides), i.e., 8 x 4 = 32 inches. Therefore the perimeter of the larger tile will be 32 inches.

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what is the standard form
[tex]f(x) = (2x - 1)(x - 5)[/tex]

Answers

The standard form:[tex]f(x)=ax^2+bx+c[/tex]
[tex]f(x)=(2x-1)(x-5)\\\\\text{Use: (a + b)(c + d) = ac + ad + bc + bd}\\\\f(x)=2x\cdot x-2x\cdot5-1\cdot x-1\cdot(-5)\\\\=f(x)=2x^2-10x-x+5\\\\\boxed{f(x)=x^2-11x+5}[/tex]

Samantha’s college runs on a trimester schedule so she receives a bill 3 times a year for tuition. Each trimester costs $1,450, and Samantha must complete 2 years of college to receive her degree. The average cost for books each trimester is $350. Approximately what will be the total cost for Samantha to get her degree?

Answers

To solve this problem you must apply the proccedure shown below:

 You have that:

 -  Samantha receives a bill 3 times a year for tuition:

 3 times a year=3 trimeters=9 months

 - Samantha must complete 2 years of college to receive her degree:

 3 trimetersx2=6 trimesters

 - Each trimester costs $1,450 and the average cost for books each trimester is $350:

 Total cost=(6 trimeters)($1,450)+(6 trimeters)($350)
 Total cost=$10,800

Answer:

$10,800

Step-by-step explanation:

bill: $1,450

She's billed 3 times a year:   1,450x3= $4,350

She,s going to college for 2 years:   4,350x2= $8,700

$8,700 total for the classes itself

Books: $350

She has to buy books for each trimester: 350 x 3 = 1,050

She attends school for 2 years: 1,050 x 2 = 2,100

Total tuition plus the cost of books is $8,700 + $2,100 = $10,800

total cost for degree: $10,800

Jason ran 325 meters farther than Kim.Kim ran 4.2 kilometers.How many meters did Jason run?Estimate to check your answer

Answers

4.2 km=4.2*1000=4200 m Kim ran
Jason 4200+325=4525 m Jason ran

Convert km to m
4.2km = 4.2 x 1000 = 4200m

Jason ran 325m farther than Kim
⇒ 4200 + 325 = 4525m

Answer: Jason ran 4525m

PLEASE HELP???!!!!!


A diagonal shortcut across a rectangular lot is 130 feet long. The lot is 50 feet long. What is the other dimension of the lot

Answers

We'll use the Pythagorean Theorem
130^2 = side^2 +50^2
side ^ 2 = 16,900 -2,500
side ^ 2 = 14,400
side = square root (14,400)
side = 120 feet



the width should be 120 ft. your welcome :)

Point Q is located at (-4, 6) Point R is located at (8, 6) What is the distance from point Q to point R?

Answers

[tex] \sqrt{ (8+4)^{2}+ (6-6)^{2} } [/tex]
                             ↓
[tex] \sqrt{ 12^{2}+ 0^{2} } [/tex]
                      ↓
[tex] \sqrt{144+0} [/tex]
           ↓
[tex] \sqrt{144} [/tex]
         ↓
12
The distance between Points [tex]Q[/tex] and [tex]R[/tex] is 12 units.
Have a nice day!

The distance from point Q to point R is 12 units.

The given coordinates are Q(-4, 6) and R(8, 6).

We need to find what is the distance from point Q to point R.

What is the formula to find the distance between two points?

The formula to find the distance between the two points is usually given by d=√((x2 – x1)² + (y2 – y1)²). This formula is used to find the distance between any two points on a coordinate plane or x-y plane.

Now, using the distance formula, we get

Distance=√(8+4)²+(6-6)²

=√144=12 units

Hence, the distance from point Q to point R is 12 units.

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Rewrite this function in the form that reveals the minimum of the function.
c(p)=p^2-28p+250

Answers

Given that the function is given by:
c(p)=p^2-28p+250
The minimum value of the function is at the derivative of c'(p)
thus from the function given:
c(p)=p^2-28p+250
c'(p)=2p-28
Thus the minimum function is c'(p)=2p-28

Which expression is equivalent to 6p + 6p?

A. 12p
B. 36p
C. 12 + 2p
D. p6

Answers

Hello!

6p + 6p = 12p

The answer is A)12p

Hope this helps!

Answer:

12p

Step-by-step explanation:

cause 6p+6p= 12p

A family is trying to pick from different shades of paint for their living room. They have narrowed it down to three different blues and six different greens.
The family decides to just randomly select a color from these. What is the probability they will pick a shade of Blue.

answer the question in decimal form to the nearest percent.


PLEASE HURRY!!!

Answers

The correct answer is 3/9

Help please........................

Answers

Remark
(0,0) does not change with the rotation, nor does it change with the dilation.
(2,0) will become (-2,0) with the rotation and (-6,0) with the dilation.
(0,4) goes right around to the - y axis.  It become (0,-4) with the rotation. and (0,3*-4) = (0,-12) with the dilation.

There is no way that these triangles are congruent. I could have said that right at the very beginning. But there is a way that they are similar. The angles between them remain unaltered. You can test that out with (0,4) to (0,0) to (2,0) which is a right angle (labeled CAB). No matter what you have done in these two steps, that right angle remains. Dilation other than a dilation of 1 will not  produce congruence.

B . <<<< Answer. 

just answer no need to explain lol

Answers

The correct answer for the question shown in the image attached is the third (option C), which is:

 C. Shifted upwards by 28 units

 The explanation is shown below:

 1. The problem gives you the following linear function:

 f(x)=ax+b

  Where a is the slope and b is the y-intercept

 2. When you graph that linear function, you obtain a line.

 3. Therefore, if b (y-incercept) increases 28,000; the line will shifted 28 units upwards.

 4. As you can see, the correct answer is the option mentioned above.


The fixed costs are represented by b.

Addition of $28,000 means, we are adding 28 to the given function. Addition/Subtraction of a number to the function brings only vertical shift not the horizontal shift.

Addition bring upward shift and Subtraction brings downward shift. So, increase of $28,000 will bring an upward shift of 28 units.

So, the correct answer is option C

A farmer was dividing up his one third of an acre of land between his 5 children. Since each child got the same amount of land, what fraction of the acre did each get

Answers

Each child got 1/15 of an acre

Stevens family traveled 240 miles in 4 hours. What was there average speed in miles per hour?

Answers

about 60 miles an hour

Answer:

60mph

Step-by-step explanation:

divide 240 by 4 it's easy that's

how I solve these types of questions so keep that in mind.

Triangle cde maps to triangle lmn with the transformation (x,y) —> (x+3,y-2) —> (2/3x, 2/3y)
Of cd =9 what is lm?

Answers

The value of LM = 6.

Let's break down the given transformations for each point:

1. Original point: [tex]\( (x, y) \)[/tex]

2. First transformation: [tex]\( (x+3, y-2) \)[/tex]

3. Second transformation: [tex]\( \left(\frac{2}{3}(x+3)[/tex], [tex]\frac{2}{3}(y-2)\right) \)[/tex]

Now, if CD = 9 in the original triangle, LM can be found using the scale factor of [tex]\( \frac{2}{3} \)[/tex], as the second transformation involves scaling by [tex]\( \frac{2}{3} \)[/tex].

[tex]\[ LM = \frac{2}{3} \times CD \]\\LM = \frac{2}{3} \times 9 \]\\LM = 6 \][/tex]

Therefore, LM = 6.

what is 50,003,087 in expanded form

Answers

50000000+3000+80+7

This is the answer^

can someone help me find the volume of these?

Answers

The volume of the triangular prism is:
 V = (1/2) * (b) * (h) * (H)
 Where,
 b: base of the triangle
 h: triangle height
 H: prism height
 Substituting:
 V = (1/2) * (9) * (12) * (19)
 V = 1026 cm ^ 3

 The volume of the cylinder is:
 V = (pi) * (r ^ 2) * (h)
 Where,
 r: radio
 h: height
 Substituting:
 V = (3.14) * ((14/2) ^ 2) * (11)
 V = 1692.46 yd^3

The distance between two cities on a map is 13 cm. What is the actual distance between the cities if the map is drawn at a scale of 1:50,000?

Answers

Answer:

6.5

Step-by-step explanation:

I swear it is. Just trust me!

Kenji invests $3,500 at an interest rate of 3%, compounded monthly. How much is the investment worth at the end of 5 years?

Answers

3500(1 + .03/12)^12(5)
3500(1.0025)^60

The answer is:
$4,065.66 or $4,066

Hope this helps :)

Answer is $4,065.66

Compound Interest:

A = P [tex](1 + \frac{r}{n} )^{nt}[/tex]

A = final amount

P = initial principal balance

r = interest rate

n = number of times interest applied per time period

t = number of time periods elapsed

(Given),

P = $3,500

r = 3% = 3/100 = 0.03

n = 12 (As there are 12 months in a year)

t = 5 years

=> 3,500 x [tex](1+\frac{0.03}{12} )^{12 X 5}[/tex]

=> 3,500 x (1.161616)

=> $4065.658 = $4065.66

So, The answer is $4065.66

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