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

A school is looking to cater an event by having a food truck. Food truck A will charge $1.50 for each item sold and a fee of $50 to come to the school. Truck B will charge $2.75 per item but will not charge a fee to come to the school. How many items must the school purchase to have the cost of these two trucks be the same? Enter in your numerical answer.

Answers

Answer:

40 items

Step-by-step explanation:

I used the equation 1.5x+50=2.75x to find the answer. If the school were to buy 40 items from either truck, they would both amount to 110.


Please help this is due tosay

Answers

I circled the answers for you!

which linear inequality is represented by the graph? O y<2/3x+3 (A)
O y>3/2x+3 (B)
O y>2/3x+3 (C)
O y<3/2x+3 (D)

Answers

Answer:

C y>2/3x+3

Step-by-step explanation:

Use y=mx+b format. The B is the y-intercept. From the y-intercept (3), go up two then to the right 3. That gives you the slope, or mx which is 2/3. The area shaded is above so it would be the greater than symbol.  

PLEASE I BEG OF YOU PLEASE HELP ME PLEASEE

Answers

Answer:

hmmm this is too hard for me.

Step-by-step explanation:

Which grade is this for?

You are buying plants and soil for your garden. The soil cost $4 per bag and the plants cost $10 each. You want to buy at least 5 plants and can spend no more than $100. Write a system of linear inequalities to model the situation.

Answers

Answer:

The system of linear inequalities to model the situation is written as:

x + y ≥ 5..... Equation 1

4x + 10y ≤ 100..... Equation 2

Step-by-step explanation:

Let

The number is soil = x

The number of plants = y

You are buying plants and soil for your garden.

You want to buy at least 5 plants

At least = greater than or equal to with the inequality sign(≥)

Hence:

x + y ≥ 5..... Equation 1

The soil cost $4 per bag and the plants cost $10 each and can spend no more than $100.

No more than means Less than or equal to with the inequality sign( ≤ )

Hence:

$4 × x +$10 × y ≤ $100

= 4x + 10y ≤ 100..... Equation 2

Therefore, the system of linear inequalities to model the situation is written as:

x + y ≥ 5..... Equation 1

4x + 10y ≤ 100..... Equation 2

What is the Slope of the line containing points Q(-4,-1) and T(0, 9)?​

Answers

Answer:

kisses -A

Step-by-step explanation:

Answer: 5/2

Step-by-step explanation: Use the slope formula

Sam bought a kite that he could do stunts with for $52. If he
paid $4.42 in sales tax, what was the sales tax rate?

Answers

Answer:

8.5%

Step-by-step explanation:

8.50% of 52= 4.42

Whoever answer this question with explanation gets marked the brainiest

Answers

Step-by-step explanation:

Classroom A has n students.

Since Classroom B has 4 less students, they have (n - 4) students.

Also Classroom C has double the students in B, so they have 2(n - 4) students.

We have A + B + C = 40.

=> n + (n - 4) + 2(n - 4) = 40

=> n + n - 4 + 2n - 8 = 40

=> 4n - 12 = 40

=> 4n = 52, n = 13.

Hence there are 13 students in Classroom A.

evaluate. (5.2 + 3) × (6.4 - 1.4) ​

Answers

Answer: 41

Hope this helps ^W^
I believe it should be 41

help plz plz plz will give brainliest

Answers

Answer:

An acute angle is an angle that measures less than 90 degrees

Step-by-step explanation:

WILL MARK YOU BRAINIEST

Answers

Answer:

11 5/9

Step-by-step explanation:


solve the equation by completing the square.

4x(x + 6) = -40​

Answers

Answer:

x = -6+-odmocnina36-40/2

Step-by-step explanation:

Answer:

x=10

Step-by-step explanation:

10 times -4 is -40 since if you multiply a negative number by a positive you get a negative

2(-2×-8)+4×=2(1+3×) someone pls help​

Answers

Answer:

x=-3

Step-by-step explanation:

2(-2x-8) + 4x = 2(1+3x)

Distribute:

-4x-16+4x=2+6x

Simplify Like-Terms:

-16=2+6x

Subtract 2 from both sides:

-18=6x

Divide both sides by 6:

x=-3

*You don't have to, but I am currently trying to reach the next level, and all I need is some more brainliest answers. If you think my answer was brainly enough, you can make my answer the brainliest, but no pressure. I just help people for fun! :) Thank you, have a great day!*

Solve the expressions when a = 9 and b = -3. Enter your answers in the boxes below.
A. -3b =
B. a/b + a =​

PLEASE HELP ME

Answers

Answer:

A.27

B.6

Step-by-step explanation:

A. -3(9)=27

B.9/-3+9=-3+9=6

Plug in what its says a and b is equal to

maria had $150 in gift certificates to use in a record store.she bought fewer than 20 recordings.each tape cost $5.95 and each cd cost $8.95. how many of each type of recordings might she have bought(it has to be graphed so i need points to plot)

Answers

Answer:

keep the canon digital marketing. this was not able the first one. it has to go on, I will not

Which expression shows another way to write 36+16?
419) + 4
4(9+4)
6(6+8)
(6+4)(6+4)

Answers

4(9+4) bc 36+16=52
9+4=13 , 13x4=52

In a juggling competition, 7/ 20 of all the jugglers use balls only, 3/ 7 of all the jugglers use rings only, and the rest of jugglers use both balls and rings. If there are less than 200 jugglers in the competition, how many jugglers use both balls and rings?

Answers

Answer:

44

Step-by-step explanation:

Number who use balls only = 7 / 20

Number who use rings only = 3/7

Fraction who use both :

1 - (7/20 + 3/7)

1 - 0.7785714

= 0.2214285

If number of jugglers is less than 200

Number of jugglers who use both :

0.2214285 * 200

= 44.285714

Number of jugglers who use both should be about 44

Help me pleaseee! Thank you! :)

Answers

Answer:

C.) 32

Step-by-step explanation:

2^5 = 32

the answer is 32
2^5=32
Hope this helps have a good day! :)

45 point question Help Asap pic below Math

Answers

Answer:

i think 5

Step-by-step explanation:

Step by step explanation

Answers

Answer: x = 4 and y = -3

Step-by-step explanation:

2x + 4y = -4

2x = -4 - 4y

x = -2 - 2y

Now that we have solved the first equation for x, we plug (-2 - 2y) into the other equation in place of x and then solve for y.

3(-2 -2y) + 5y = -3

-6 - 6y + 5y = -3

-y = 3

y = -3

Now that we know y, we plug it into the original equation and solve for x.

2x + 4(-3) = -4

2x + -12 = -4

2x = 8

x = 4

You can check the answer by plugging both x and y into either of the original equations.

All squares are also rhombuses.
True or false

Answers

Answer:

true

Step-by-step explanation:

Cause if you draw a square and turn it, its gone be a rhombus

Answer:

True

Step-by-step explanation:

A number, x, is 4 times another number, y. The difference
between the two numbers is 18. What is the value of the
larger number?

Answers

Answer:

The value of the larger number is

[tex]x=24[/tex]

Step-by-step explanation:

A number, x, is 4 times another number, y.

[tex]x=4y[/tex] --------- (1)

The difference between the two numbers is 18.

[tex]x-y=18[/tex] -------(2)

Re-arranging equation (2) yields

[tex]-y=18-x\\y=x-18[/tex]------------- (3)

Substitute y=x-18 in equation (1)

[tex]x=4 (x-18)[/tex]

[tex]x=4x-72\\x-4x=-72[/tex]

[tex]-3x=-72\\x=\frac{72}{3}\\x=24[/tex]

Substitute x=24 in equation (3)

[tex]y=24-18\\y=6[/tex]

Which of the following is true about the inequality below?
*>9
A. The inequality has an infinite number of solutions.
B. The inequality has no solutions.
C. The inequality has 2 solutions.
D. The inequality has 1 solution.
i need to know asap!!!

Answers

Answer:

I'm guessing A, but am not sure, as for any number can go there if it's over 9!

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

Answers

Answer:

(-6, 4)

Step-by-step explanation

translation rule: (x+1,y-3)

(-7+1, 7-3)

(-6, 4)

1.2^a x 2^5 =2^0

a=?

Answers

Answer:

One thing that is unclear here is whether the "1." at the start is part of the number "1.2" or if it is an enumeration of the question, and the base raised to the exponent is in fact 2.

The rest of the equation seems to indicate the latter, so we'll solve both:

If 1.2ᵃ ₓ 2⁵ = 2⁰, then a is approximately equal to -19.009.

If as I'm guessing is the correct question, 2ᵃ ₓ 2⁵ = 2⁰, then a is equal to -5.

Step-by-step explanation:

Interpretation #1:

[tex]1.2^a \times 2^5 = 2^0\\1.2^a \times 32 = 1\\1.2^a = \frac{1}{32}\\log_{1.2} \frac{1}{32} = a\\a \approx -19.009[/tex]

Interpretation #2:

Here the question is much simpler, as we need only add the exponents when adding and dividing:

[tex]2^a \times 2^5 = 2^0\\2^a = 2^0 \div2^5\\2^a = 2^{-5}\\a = -5[/tex]

the main sailboat has the dimensions shown in figure at the right . what is the height of the main sail? ​

Answers

Answer:

H = 11.3 or 11.4

Step-by-step explanation:

[tex]\frac{11sin46}{sin44}[/tex] = 11,3908...

[tex]\frac{11sin46}{sin44}=11,3[/tex]

(Im not sure)

23x+50x-79x=??




have a great day ​

Answers

Answer:

-6x

Step-by-step explanation:

23x+50x-79x

We take out x from the terms and group them up.

We therefore get (23+50-79)x after taking out x, and grouping the coefficients together.

Calculating 23+50-79 gets us -6, which is the coefficient of the final answer.

So the answer would be -6x.

Answer:

Step-by-step explanation:

Here you go mate,

Step 1

23x+50x-79x  Equation/Question

Step 2

23x+50x-79x  Simplify

23x+50x-79x

Step 3

23x+50x-79x  Combine terms

(23x+50x+(-79x))

Step 4

(23x+50x+(-79x))  Solve

answer

-6x

Hope it helps

Plzzzzzzzzzz help me and dont lie
Without specialization, how would a person have to satisfy his or her needs? And is not B so is either A or C
A by doing it themselves
B by asking someone else
C by relying on teamwork

Answers

Answer:

A. by doing it themselves lol

Step-by-step explanation:

A truck is carrying cranberry juice, grape juice, and pineapple juice bottles in a ratio of
7 : 2 : 3. If there are 40 grape juice bottles, then how many juice bottles in total are there?

Answers

Answer:

140

Step-by-step explanation:

7- Cranberry

2:Grape = 40 so 40/2 = 1

3:Pineapple

1= 20 juices

7+2+3 is 12

20 x 12 is 140

40/2=a factor of 20

7+2+3=12, so multiply that by a factor of 20.

20*12=240 total juice bottles is the answer

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

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