Lake Chad in Africa had a surface area of about 10,000 square miles in 1963. Because of climate changes and increased water usage by humans, the surface area decreased to about 850 square miles in 2001. By what percent did the surface area change from 1963 to 2001?

Answers

Answer 1

Answer:

iuebyefyurbfuyrfbofrvfeybyrvfewqybqwyboiwqebfiwuqefbiwuqefbipuwqefbipuwqefbpiuwqef

Step-by-step explanation:


Related Questions

What are your 10 top fav social media aka tt dances? Winner gets BRAINLIST!
(i will choose by the best top 10) CHOOSE WISELY
tt stand for the popular social media we all know and love.( sadly BRAINLY wont let me write it)

Answers

Answer:

1. renegade

2. tap in

3. blinding lights

4. say so

5. wap

6. what you know about love

7. savage love

8. party girl

9. all about cake

10. go daddy go,

At a school cafeteria a cold lunch costs $1.80, and a hot lunch costs $3.00. During one school year a school year a teacher spent a total of $288.60 on cold lunches and hot lunches. The number of cold lunches the teacher bought was 1 fewer than twice the number of hot lunches the teacher bought. Which system of equations can be used to find c, the number of cold lunches, and h, the number of hot lunches, the teacher taught during the school year?

Answers

Answer:

System of Equations is given as:

c = 2h - 1...... Equation 1

1.8c + 3h = 288.60....Equation 2

Step-by-step explanation:

Let us represent

The number of Cold lunch = c

The number of Hot lunch = h

The number of cold lunches the teacher bought was 1 fewer than twice the number of hot lunches the teacher bought.

Hence:

c = 2h - 1

At a school cafeteria a cold lunch costs $1.80, and a hot lunch costs $3.00. During one school year a school year a teacher spent a total of $288.60 on cold lunches and hot lunches.

Hence:

$1.80 × c + $3.00 × h = $288.60

1.8c + 3h = 288.60....Equation 2

The system of equations can be used to find c, the number of cold lunches, and h, the number of hot lunches, the teacher taught during the school year is given as:

c = 2h - 1...... Equation 1

1.8c + 3h = 288.60....Equation 2

The system of equations that can be used to calculate the number of hot and cold lunches is [tex]\mathbf{1.80c +3.00h = 288.60}[/tex] and [tex]\mathbf{c = 2h - 1}[/tex]

Let h represents hot lunch, and c represents cold lunch.

So, we have:

[tex]\mathbf{1.80c +3.00h = 288.60}[/tex]

[tex]\mathbf{c = 2h - 1}[/tex]

Substitute [tex]\mathbf{c = 2h - 1}[/tex] in [tex]\mathbf{1.80c +3.00h = 288.60}[/tex]

[tex]\mathbf{1.80(2h -1) +3.00h = 288.60}[/tex]

Expand

[tex]\mathbf{3.60h -1.80 +3.00h = 288.60}[/tex]

Collect like terms

[tex]\mathbf{3.60h +3.00h = 288.60 + 1.80}[/tex]

[tex]\mathbf{6.60h = 290.4}[/tex]

Divide both sides by 6.60

[tex]\mathbf{h = 44}[/tex]

Substitute 44 for h in [tex]\mathbf{c = 2h - 1}[/tex]

[tex]\mathbf{c = 2(44) - 1}[/tex]

[tex]\mathbf{c = 83}[/tex]

Hence, the system of equations that can be used to calculate the number of hot and cold lunches is [tex]\mathbf{1.80c +3.00h = 288.60}[/tex] and [tex]\mathbf{c = 2h - 1}[/tex]

Read more about simultaneous equations at:

https://brainly.com/question/16763389

Find the measure of each angle indicated

Answers

D is the correct answer

(3,8) (9,0) find the slope

Answers

m= -8/6 = -4/3 which can go to -1.3 but u can keep it as a fraction if it needs to be

There was 20 coins and 4 bags and you have to put all the coins to make it even in all 4 bags how many coins go in each bag?​

Answers

Answer:

5

Step-by-step explanation:

20/4 = 5

5 coins go in each bag

What is the image point of (-7,7) after a translation right 1 unit and down 3 units?

Answers

Answer:

Step-by-step explanation:

We start at (-7, 7).  A translation of 1 unit to the right results in (-6, 7).  A translation down from there results in (-6, 4).  This is the desired image point.

WILL MARK YOU BRAINLIEST

Answers

Answer: 4

Step-by-step explanation:

Answer:

PZ = 4

because P is the centre of XYWZ

=> PZ = 1/2.XZ

WP = 1/2. WY

=> PZ + WP = 1/2.(XZ + WY) = 1/2.24 = 12

=> PZ = 12 - WP = 12 - 8 = 4

Casey paid a total of $24.00 for 4 shirts. If each shirt costs the same amount, what is the price of one
shirt?

Answers

Answer:

$6

Step-by-step explanation:

6 x 4 = 24

Please send help ASAP.

Answers

Answer:

d. -4 <= x - 5

Step-by-step explanation:

I think youre asking about question 5.

First replace the x with the -2 in every problem.

Now solve:

a. 6 × -2 < 10

6 times -2 is -12, and -12 is less than -10, so that ones true and not the answer

b. -2 × -2 > -3

-2 times -2 is 4, and 4 is greater than -3, so that ones true and not the answer

c. -2/4 <= 0

-2 divided by 4 is -1/2, and -1/2 is less than 0. so that ones true and not the answer

So obviously the answers d, but we're gonna check anyway

d. -4 <= -2 - 5

-2 minus 5 is -7, and -7 is not less than -4, so its not true and the answer

A diver went down 25.55 feet below the surface of the ocean, and then 11.5 feet further down, he then rose 12.25 feet. Enter and solve an expression to find the diver's new depth.

Answers

Answer: it would be 24.8ft

The answer above is correct

Choose the graph that is represented by the function:


y=- 63/4x2 + x4 - 4




Select one:

a. D

b. B

c. C

d. A

Answers

Answer:

is a. D.

Step-by-step explanation:

I hope you serve my answer and goodluck ^^

Identify the correct Triangle Congruence Theorem that describes the figure below.



A. SSS
B. SAS
C. AAS
D. HL
E. ASA

Answers

[tex]\tt{PQ=TS }[/tex]

[tex]\tt{ PW=TW }[/tex]

[tex]\tt{ QW=SW }[/tex]

SO,

it is S-S-S

side-side-side

17)
Let X = {x | x is a whole number less than 10}, Y = {yly is an even number}
What is XnY?
A)
{0, 2, 4, 6, 8}
B)
{1, 2, 3, 4, 5, 6, 7, 8, 9}
C){1,3,5,7,9)
D)
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}

Answers

Answer:

answer of XnY where Y is an even no and X is a whole number less than 10 is

A {0,2,4,6,8}

Answer:

Step-by-step explanation:

how do you work out the problem -1n+1=11​

Answers

Answer:

-1n + 1 = 11

subtract 1 both sides

-1n = 10

-n = 10

n= -10

Step-by-step explanation:

Which fraction has a a value that’s equal to 3/4?

Answers

6/8
Half of 6 is 3 and Half of 8 is 4
It will be 6/8 because the half of 6 is 3 and the half of 8 it’s 4. Hope this helps!

omg someone do these for me and ill give brainliest please im rushing

Answers

1. 74 tens

2. 3, 7, 11

3. 4 2 5

4. 23

5. 560

6.440

7. Sum

8. 1 dollar and 40 cents

9. 84 cents

Hope this helps plz mark brainly :)

Answer:

1. 74

2. 3, 7, and 11

3. 4, 2, and 5

4. 20.2307692308

5. 560

6. 440

7. sum

8.  Chloe

9. 84 cents

Perform the indicated operation. State the domain restrictions

Answers

Answer:

c

Step-by-step explanation:

Answer:

Step-by-step explanation:

Domain has all values of x ( think X marks the spot on your domain) so the restrictions come in those cases from the fact that a fraction can NOT have the denominator 0 because dividing by 0 is not allowed.

5.

here x+1 [tex]\neq[/tex] 0 and x+3 [tex]\neq[/tex] 0 so the domain restrictions are x [tex]\neq[/tex] -1 and x[tex]\neq[/tex] -3

to solve you need to factor x^2 -6x-27

you can do it by using  

x^2 - Sx +P = 0 where S= root 1 +root 2 and P = root 1*root2

so in our case Sum has to be 6 and Product -27, what 2 numbers add to 6 and their product is -27? ....-3 and 9; S= -3+9 = 6 and P= -3*9 = -27

it will factor in (x-root 1) (x-root 2)  

x^2 -6x-27 = (x+3)(x-9)

[tex]\frac{(x+3)(x-9)}{x+1} * \frac{x+1}{x+3} =\\[/tex]

simplify x+1 and x+3

x-9

Pls help and show workings
Due ASAP

Answers

Answer:

ASA angle side angle

Step-by-step explanation:

DE=JH(given)

angle E= angle H (given)

angle D=angle J (given)

Angle side angle..........

SOMEONE HELP NOW IM ON A TIMED TEST
Margo's hybrid car uses 56 of a gallon of gas for every mile that Margo drives. Margo
drove her car 200 miles to visit her aunt. When she left her house the car's gas tank
was full. When she arrived at her aunt's house the gas tank contained 8 gallons of gas.
She did not stop for gas along the way.
Which equation represents the number of gallons of gas, y, in the car's tank after
Margo drives the car x miles?

Answers

Answer:

It is C

Step-by-step explanation:

John went to the store and bought 4 pencils
and 10 binders and spent $64. Carmen went
to the same store and bought 7 pencils and 4
binders and spent $31. If Lisa wants to buy
pencils and binders from the same store,
how much should they tell her each item
costs?

Answers

You would have to use system of equations for this problem.
X= pencils and Y= binders
4x + 10y = 64
7x + 4y= 31
Pencils are $1 each and binders are $6 each.

A population of 752,000 people decreases at a rate of 1.4% each year. Let t represent the number of years and A(t) represent the amount after years, Which function models this situation?

Answers

Solution :

Initial population, P = 752,000 .

Rate of decrease, r = 1.4 % .

Now, population decrease in 1st year :

[tex]P_1 = P( 1 - 0.014 )[/tex]

Also, population decrease in 2nd year :

[tex]P_2 = P_1( 1 -0.014 )\\\\P_2 = P( 1 - 0.014)^2[/tex]

Similarly for each next x year, population will be :

[tex]P_x = P( 1-0.014)^x[/tex]

Therefore, population after x years is given by :

[tex]P_x = 752000 ( 1-0.014)^x[/tex]

Combine Like Terms
-3+5C+42C+12

Answers

Answer:

47C + 9

Step-by-step explanation:

arrange the like terms so you can combine them (5c + 42c) (-3 + 12)

Answer: -3 + 47C +12

Step-by-step explanation:

The graph of a function f is shown below. Use the zeros and the turning points of the graph to find the rule for f.

A.
f(x) = x4 − 8x2 + 16

B.f(x) = −x4 + 5x2 − 4

C.f(x) = x3 + x2 − 4x + 4

D.f(x) = x4 − 5x2 + 4


Answers

Answer:

Answer is D

Step-by-step explanation:

Using the zeros of the graph we should have y=0 when we put x=-2, x=-1, x=1, x=2

Only the function on option D works, so the answer is D

AA two-story building measures 21 feet from the ground. A scale model shows the building to be 3 inches tall. How many inches would an 84 foot building be in the model?​

Answers

Answer:

12 inches

Step-by-step explanation:

21 feet = 3 inches (in a model)

84 feet = 12 inches (in a model)

84 ÷ 21 = 4

3 × 4 = 12

△RST ~ △RYX by the SSS similarity theorem.

Which ratio is also equal to StartFraction R T Over R X EndFraction and StartFraction R S Over R Y EndFraction?

StartFraction X Y Over T S EndFraction
StartFraction S Y Over R Y EndFraction
StartFraction R X Over X T EndFraction
StartFraction S T Over Y X EndFraction

Answers

Answer:

Answer would most likely be option D. StartFraction S T Over Y X EndFraction

Explanation:

Take care..

PLEASE HELP

What is the solution

3/4x+2x-3=-1/4x+21

Answers

Answer:

x=1/27

Step-by-step explanation:

In attachment...

help will mark brainliest plz plz plz

Answers

Answer:

a.)2 b.)6

Step-by-step explanation:

a.) solve 7x+4=18 because EC bisects making FEC = CEG

b.) solve 12y+18=90 because AED is 90 degrees

A calculator is listed for $110 and is on clearance for 35% off. Sales tax is 7%. What is the cost of the calculator? ​

Answers

Answer:

$76.51

Step-by-step explanation:

I found how much the calculator cost on clearance first. Then I found the sales tax and added them together.

Can some one solve 4 for me plz I’ll give a crown

Answers

Answer: I'm pretty sure it's the 3rd one

Step-by-step explanation:

I think it’s c but I’m not too sure

Compare each side of the equation 56 ÷ 4 = 45 ÷ 3 to determine if it is true or false. (2 points)
True
False

Answers

56/4=14
45/3=15
14 does not equal 15
False
The Correct answer is false
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