Solve the following systems of equations without graphing
5x + 10y = 30
-5x +15y = 20

Answer:

I think B

Step-by-step explanation:

It's not a square when you cut it since after you cut one side the length would by 4cm by 5cm so there for it's not a square but a rectangle

sorry if it's wrong

Answer:

c-17=x>33

c=51

Step-by-step explanation:

The value of number c should be greater than 50.

It is given that difference of a number c and 17 is more than 33.

We have to find out the value of number c.

What do you mean by algebraic expressions ?

The algebraic expressions are those which are made up of variables, constants and algebraic operations i.e., addition, subtraction, etc.

As per the question ;

The difference of c and 17 is more than 33.

i.e.,

difference of c and 17 meant ; 17 should be subtracted from c and this is greater than 33.

i.e.,

c - 17 > 33

c > 33 + 17

c > 50

Thus , the value of number c should be greater than 50.

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Answer:

1 is the correct answer

Step-by-step explanation:

Answer:

x=1 and y= -4

Step-by-step explanation:

step one: plug -4x into y in thi]e first equation.

2x+5(-4)= -18

step two: solve for x

2x-20= -18

(add 20 to both sides to eliminate -20 on the right)

2x=2

(divide both sides by 2 to get x by its self)

x=1

step 3: now that we found the value for x plug it in to either equation and solve for y

y= -4x

y= -4(1)

y= -4

Answer:

$16.125 but i don't know if you have to round

Step-by-step explanation:

Answer:

A) 70

Hope this helps :)

Answer:

Step-by-step explanation:

Area of square = 144 sq ft

Area of circle = πr² = 36π sq ft

Total area = (144+36π) sq ft

Square section of pond is 10 ft by 10 ft, area = 100 sq ft

Circular area of pond has diameter of 8 ft.

Area = πr² = 16π sq ft

Area of pond = (100+16π) sq ft

Area of border = (144+36π)-(100+16π) = (44+20π) sq ft

Answer:

True

Step-by-step explanation:

If k = 2, then we plug in 2 for every instance there is a k. So...

8k + 4 > 18

Will turn into...

8(2) + 4 > 18

Then solve using PEMDAS (or whatever you were taught. Parenthesis, Exponent, Multiplication/Division, Addition/Subtraction.)

16 + 4 > 18

20 > 18

Since 20 is greater than 18, 2 can be a solution for this inequality.

Answer:

Step-by-step explanation:

Im not sure if u need to use shapes, but I will since it says in the example

4x - put it in a square box

2x - also in a square box

3 - in a circle box

1 - in a circle box

combine like terms

4x+2x=6x

3+1=4

6x+4

Answer:

(2,3)

Step-by-step explanation:

Answer:

(2,3)

Step-by-step explanation:

Once again the answer to the equations is where the two lines intersect and they intersect at (2,3)

Answer:

8.9

Step-by-step explanation:

Answer:

116

Step-by-step explanation:

Answer:

it is b

Step-by-step explanation:

Considering that it's highest exponent is of 3, the expression 5x³ + 2x - 3 is a cubic expression.

The degree of a polynomial is given by the highest exponent.

The highest exponent of the expression 5x³ + 2x - 3 is a 3, hence it is a cubic expression.

More can be learned about the degree of a polynomial at https://brainly.com/question/24380382

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Answer:  C: cubic expression

Step-by-step explanation:

Classify the expression: 5x³ + 2x − 3

we know that

Polynomials can be classified two different ways - by the number of terms and by their degree.

so

a) By the number of terms is a trinomial, because has three terms

b) By their degree The degree of the polynomial is found by looking at the term with the highest exponent on its variable

The highest exponent is 3 so this is a 3rd degree trinomial  

therefore

Is a cubic expression

Answer:

Yes god is really good

Step-by-step explanation:

Answer:

The answer is C.6+y

............

Answer:

21

Step-by-step explanation:

straight line = 180 degrees ( H,D,R)

180 = 7x - 3 + 2x  - 6    

180 = 7x + 2x - 3 - 6     (group the same type number together)

180 = 9x -9           (simplify the numbers)

189 = 9x    (+9)

21 = x    (divide by 9)

Answer:

The pants will either be 25.50 or 4.50. Sorry I'm not sure if 15% off 30.00 is the number minus the original price or not.

Step-by-step explanation:

Answer:

D = 272 ft

Step-by-step explanation:  hope this helps. pls mark me brainliest

Answer: $5.19

Step-by-step explanation:

If there are 40 working hours in a week and 52 weeks in a year, 40 * 52 should be the amount of working hours in a year.

40 * 52 = 2080 working hours

Nate needs $900 to live each month and there are 12 months in a year, so $900 * 12 would equal how much he spends per year.

$900 * 12 = $10800

Divide $10800 by 2080 working hours to get how much he needs to make per working hour.

10800/2080 = approximately 5.19, rounded down from the nearest hundredth

He needs to make $5.19 per hour, so the answer is the last option.

Answer:

C) 50 degrees

Step-by-step explanation:

angles x and 130 degrees are supplementary in that they add up to 180 degrees.

x + 180 - 130 = 50 degrees

Answer:

[tex]2x^{2}[/tex]-24xy+15y

Step-by-step explanation:

Answer:

I can do the top 2

1. a = -11

2. z = 9/2           (or nine over two in word form)

Step-by-step explanation:

ුැේෞඈචොමටඉපගපයිිඅඅේෛෛඑටමවවඈ

Answer:

- 310.5/100

Step-by-step explanation:

Answer:

-310 1/2

Step-by-step explanation:

hope this helps :)

Answer:

6

Step-by-step explanation:

pls brainliest

9/2=4.5

27/4.5=6

Answer:

7

Step-by-step explanation:

divide 66.5 by 9.5