Mathematics Middle School

A marine biologist is studying the population of bottle-nosed dolphins that lived in the Gulf of Mexico. On an outing one summer, they captured and tagged 60 dolphins. The next summer, they captured 90 and found that only 12 had been tagged. Based on this data, how many dolphins can they assume are living in the Gulf of Mexico?

Answers

Answer 1

Answer:

( -3, 10)

Step-by-step explanation:

Related Questions

Muriel translated the phrase below into an algebraic expression and then evaluated it for n = 4.

the product of a number and 8

Which of the following contains the correct expression and value?

Answers

Answer:

Last answer is Right

Step-by-step explanation:

I'm sorry if Wrong it looks right tho

Answer:

It is the third expression.

Step-by-step explanation:

'8n' means 8 multiplied by n. You said product of 8 and a number. So, 8 and 4 is the number.

I hope it helped.

How many unit cubes with side lengths of 1/2 unit are needed to fill the right rectangular prism?

Answers

Answer:

4

Step-by-step explanation:

Solve when m = 7 and n = 4

A.11
B.3
C.13
D.14

Answers

Answer:

D 14

Step-by-step explanation:

mn/2

=7*4/2

=28/2

=14

A car dealership sold 850 cars last year. This year the dealership sold 715 cars. What is the percent decrease, to the nearest percent, in the number of cars sold from last year to this year?????

Answers

The answer is 16%

Hope this helps :)

Answer:

15.8824% decrease

Step-by-step explanation:

pls help decide what i should type ..

Answers

1.) It snowed like it was the North Pole!

2.) We hit the beach and stayed all day.

3.) I had barrels of fun at the beach!

Please help will give brainliest

Answers

Answer:

The diameter is: 8 feet

The radius is: 4 ft.

The area is: 50.27

Step-by-step explanation:

Hope this helps!

What is the surface area of the solid that this net can form?
A. 106 square centimeters
B. 150 square centimeters
C. 210 square centimeters
D. 270 square centimeters

Answers

C. 210 sq cm.

13 + 12 + 5 = 30 (length)
30 • 5 = 150 sq cm (the total area of the long rectangles across)

12 • 5 = 60 sq cm
(no need to divide by 2 even if they are triangles because there are two on either side so they would cancel out)

150 + 60 = 210 sq cm.

Help ASAP!! Use IMAGE!!

Answers

A is your best shot.
Best answer is A....

Sean's grandfather is three years older than four times Sean's age. If Sean's grandfather is 63, which equation can be used to find Sean's age?

Answers

60 divided by 4.
EXPLANATION:
If his grandfathers age is 3 more than whatever 4 times seans age is. we can do 63 - 3. which is 60.
Then you fond seans age. 60 divided by 4 is the equation to find seans age.
sry its a bad explanation but I hope the answer helps!

Answer: Sean is 15 Equation (60-3) ÷ 4

Step-by-step explanation:

(60-3) ÷ 4

63-3 = 60

60 ÷ 4 = 15

PLEASE!! HELP!!! ALL MY POINTS!!

Answers

Answer:

1/16

Step-by-step explanation:

The equation of a direct proportion is

y = kx

Let amount of fertilizer = y and amount of peat moss = x

We have x = 12 when y = 3/4

3/4 = k * 12

k = (3/4)/12 = 3/4 * 1/12 = 3/48 = 1/16

y = 1/16 x

The constant of proportionality is 1/16.

Help! Please help!,!

Answers

Answer:

use the pythagoras theorem ok for 3rd side

i.e. (5.6)²+(3.9)²=c²

If F(x) = x² + 5x and G(x) = 2x + 1, find F(5) + G(6). 48 63 107

Answers

Answer:

63

Step-by-step explanation:

F(x) = x² + 5x

F(5) = (5)² + 5(5) = 25 + 25 = 50

G(x) = 2x + 1

G(6) = 2(6) + 1 = 12 + 1 = 13

F(5) + G(6) = 50 + 13 = 63

Answer:

63

Step-by-step explanation:

Thank u hope it helps..

mark me the brainliest please

Help NOW PLEASE!!! really need help

Answers

Answer:i think A

Step-by-step explanation:

I think it’s a not that sure

Based on the dot plot, do you think the proportion of the middle school students at this school who like pop music is 0.5? Explain why or why not.

Answers

Answer:

Yes because 0.5 is the biggest number

Step-by-step explanation:

yes because that’s the only amount of people left

Please help me for 21 points.

Answers

Answer:

24.44 percent

Step-by-step explanation:

F=Friday

S=Saturday

P(F or S)= 20/90+22/90-20/90=22/90

22/90 as percentage is 24.44 percent

Answer:

For Friday, 22% of the check in's happened on that day. For Saturday, 24% of the check in's happened on that day. For both days combined, 46.66% of the check in's happened for both.

Step-by-step explanation:

Overall there were 90 check ins. Since 20 happened on Friday, it would be 20/90, which is 22%. Saturday, 22 check ins happened, so it would be 22/90, which is 24%. Overall, between Friday and Saturday, 42 check in's happened, so it would be 42/90, which is 46.66%.

Create your own statistical question
really need help

Answers

Answer:

how many pencils do each student have

Step-by-step explanation:

Answer:

how much anime could i watch in 24 hours

Step-by-step explanation:

brainliest

Erik transformed the equation y = 2(x − 2)^2 + 5 from vertex form to standard form. His steps are shown below. Is Erik's work correct? If not, identify and correct his error.
y = 2(x − 2)^2 + 5
y = 2(x^2 − 4x + 4) + 5
y = 2x^2 − 8x + 8 + 5
y = 2x^2 − 8x + 13
A. No. The error is in the second line: the expanded form of (x − 2)^2 is x^2 − 4.
B. No. The error is in the third line: the product of 2 and x^2 − 4x + 4 is 2x^2 − 4x + 4.
C. No. The error is in the fourth line: the sum of 8 and 5 is 12.
D. Yes. Erik is correct in his transformation from vertex form to standard form.

Answers

It's A or B try using mathpapa it really helps :)
I think the answer is letter B

Which shape has a greater perimeter?

Answers

Answer: Shape B, which is the thin and long rectangle.

Step-by-step explanation:

Shape A:

4 + 4 + 8 + 8

4+4 = 8

8 + 8 = 16

16 + 8 = 24

Shape A has a perimeter of 24.

Shape B:

2 + 2 + 11 + 11

2 + 2 = 4

11 + 11 = 22

22 + 4 = 26

Shape B has a perimeter of 26.

The volume of a rectangular prism is 320 in3. If the area of the base is 32 in2, find its height.

Answers

Answer: 10

Hope it helps :)

10 hope this helps da baby yeyeye

I. You withdraw $17 from your account.
II. A running back loses 17 yards in a game.
III. The temperature rises 17 degrees



The integer -17 would BEST represent which of these events?

A)I only
B)III only
C)I and II only
D)II and III only

Answers

Answer:

Step-by-step explanation:

Answer:

b

:[] yup this ia s rjkd. skd

A supermarket has 238 large boxes of cereal. Each large box holds 32 small bags of cereal. How many small bags of cereal are in the supermarket?
(A) 6,506 (B) 6,616 (C) 7,506 (D) 7,616

Answers

Answer:

7,616

Step-by-step explanation:

You have to multiply 238 and 32.

238 x 32 = 7,616.

4. What is the area of the composite shape below?

do it step by step

Answers

Answer:

A=(L×W)

=10ft×8ft=80ft²

Step-by-step explanation:

I hope it helped. I think this is the answer.

a=(pi)(r^2)
a=(l)(w)

half-circle
a=(3.14)(4^2)
a=50.24
50.24/2 (because it half circle)
25.12

rectangle
a=(10)(8)
a=80

total area
80+25.12=105.12

105.12

I need help with math please! :)

Answers

Answer:

ok but heres the graph i will put more in a sec

Step-by-step explanation:

OML MY FINGER SLIPPED--

The original price of a pair of jeans was $40. The price was marked down to $35. What is the percent of decrease in the price?

Answers

Answer:

8 procent

Step-by-step explanation:

first i did 40/8=5 .

and then 40-5=35

If you answer all these questions for me, you'll get extra points on brainly!

Answers

Answer:

its too small :(

Step-by-step explanation:

It’s not clear.........

Find the area of the square pyramid represented by this net.

Answers

Answer:

16cm

Step-by-step explanation:

It’s is most likely b

Anyone want to help me with this please?

Answers

Answer:

Step-by-step explanation:

∠EHG=∠EHF+∠FHG=90°

∠EHF=∠FHG+12°

2∠FHG+12°=90°

2∠FHG=78°

∠FHG=39°

Determine the intercepts of the line.

Answers

Answer:

X intercept- (4.333,0)

Y intercept--(0,-13)

The cone and cylinder above have the same radius and height. The volume of the cone is 162 cubic inches. What is the volume of the cylinder?

A. 54 cubic inches

B. 81 cubic inches

C. 324 cubic inches

D. 486 cubic inches

Answers

The answer is D because if a cone and a cylinder have the same radius and height, the volume of a cone is 1/3 of the volume of a cylinder. So you would need to multiply 162 by 3 to get the volume of the cylinder, which is 486

The volume of the cylinder is 486 cubic inches.

What is Volume?

Volume of a three dimensional shape is the space occupied by the shape.

Given that,

Radius and height of the cylinder and the cone are same.

Let r and h be the radius and height of each of the cylinder and the cone.

Volume of the Cone = [tex]\frac{1}{3}[/tex] π r² h

Volume of the cylinder = π r² h

We have, volume of the cone is 162 cubic inches.

[tex]\frac{1}{3}[/tex] π r² h = 162

Multiplying both sides by 3,

π r² h = 162 × 3

π r² h = 486 cubic inches

Hence the volume of the cylinder is 486 cubic inches.

Learn more about Volume here :

https://brainly.com/question/13338592

#SPJ3

Use the distributive property to create an equivalent expression to the equation 9(2j + 5j).

Answers

Answer:

63 Hope this helps you and everyone else :)

Step-by-step explanation:

First, multiply 9x2 to get 18. Then, multiply 9x5 to get 45. Finally add both numbers to get 63.

Answer:

I think 63j

Step-by-step explanation:

9(2j)=18j

9(5j)=45j

18j+45j= 63j

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