MATHEMATICS MIDDLE SCHOOL

Lake Victoria hast the largest surface area of all lakes in Africa.Its surface area is 26,828 square miles.How much larger is the surface area of Lake Superior than lake Victoria

Answers

Answer 1
Answer: 4,872 square miles. I believe lol

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MIDDLE SCHOOL

If an interior angle of a regular polygon measures 144° how many sides does the polygon have

Answers

Answer:

Step-by-step explanation:

The interior angle of a polygon is given by

(n-2)×180

or for regular polygon n × each interior angle.

Therefore since it is a regular polygon

Given than interior angle is 144

Then,

(n-2)×180=n× interior angle

180n-360=144n

180n-144n=360

36n=360

Then, n=360/36

n=10

Then the polygon has 10_sides which is a decagon.

HIGH SCHOOL

The slope and y-intercept for 2y+8x=1

Answers

The slope is -4x and a he y intercept is 1/2.
Solve for  y=mx+b form
m=slope
b=y intercept

solve for y


2y+8x=1
minus 8x both sides
2y=-8x+1
divide both sides by 2


the slope is -4
the y intercept is
HIGH SCHOOL

Simplify 4 + (-3) - 2 x (-6 )

Answers

If you would like to simplify 4 + (-3) - 2 * (-6), you can do this using the following steps:

4 + (-3) - 2 * (-6) = 4 - 3 + 2 * 6 = 1 + 12 = 13

The correct result would be 13.
HIGH SCHOOL

PLEASE HELP ASAP!!! Simplify the following expression.

(x+1)^2-3(x+2)

a. x^2-3x+7
b. x^2-x-5
c. x^2-3x-5
d. x^2-x+3


Simplify the following expression.

(5x^3y^-3)(-6x^4y)

a. -30x^7y^2
b. -30x^12y^3
c. -30x^12/y^3
d. -30x^7/y^2


Solve the following equation.

8+x/2 - x+3/3=4

a. x=-14
b. x=6
c. x=14
d. x=-6


Solve the equation.

x^2-3x-8=x+4

a. x=-6 or x=2
b. x=1+ sqrt5 or x=1- sqrt5
c. x=1+2sqrt3 or x=1-2sqrt3
d. x=-2 or x=6


Joseph is solving the equation x^2+8x-4=0 using the technique completing the square.
x^2+8x-4=0
x^2+8x+?=4+?
What number should Joseph add to both sides of the equation to complete the square, and why?


a. He should add 4 to both sides because 8/2=4.
b. He should add 4 to both sides because (4/2)^2=4.
c. He should add 16 to both sides because 16/2=8.
d. He should add 16 to both sides because (8/2)^2=16.

Answers

Part 1:



option b.


Part 2:


option d


Part 3:


Multiply through by the LCM of 2 and 3 (i.e. 6)


option b


Part 4
x^2-3x-8=x+4



option d


Part 5
Joseph is solving the equation x^2+8x-4=0 using the technique completing the square.
x^2+8x-4=0
x^2+8x+?=4+?

In completeing the square method, you divide the coeficient of x by 2, square the result and add to both sides of the equation.

Therefore, he should add 16 to both sides because (8/2)^2=16.

option d.
MIDDLE SCHOOL

a decorative pillow is in the shape of a parallelogram. it's base is 28 centimeters, and it's height is 24.5 centimeters. what is the area of the front surface of the pillow.​

Answers

24.5•28=686 centimeters
HIGH SCHOOL

7.67,7,7.72,7.38 least to greatest

Answers

7 , 7.38, 7.67, 7.72
HIGH SCHOOL

Isabel earned 350 points wile she was playingblastibg robot.isaabels mom earned 3 times as many then isabel. how many points did isabels mom earn

Answers

Isabel's mom earned 1050

350 * (3) =1050
(three times as much)
350 x 3 = 1050

hope this helps you
MIDDLE SCHOOL

A wise man once said "500 reduced by twice my age is 394." what is his age?

Answers

X=the man's age
500-2x=394
-500       -500
-2x=-106
-2x/2=-106/-2
x=53

FINAL ANSWER: 53 years old

Hope this helps! :)
500-2x=394
-500       -500

-2x=-106

-2x/2=-106/-2
       =53 years old.
HIGH SCHOOL

Suppose you find seven articles related to the topic of your research paper. In how many ways can you choose five articles to read?

Answers

ways

Permutation and Combination
  • The permutation is the number of possible arrangements that can be constructed by selecting items from a set of items.
  • The number of possible groups of objects each that can be selected from the available objects is the combination.

Total number of articles

Number of articles selected

So,

Number of ways five articles are selected out of seven articles

                                                                                                 

Find out more information about combinations here:

brainly.com/question/11732255?referrer=searchResults

I believe the answer would be 35 ways.
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