Numbers and Operations KA 8th grade- correct answers only ty, and have a great day folks (7 pts)

Answer:

Step-by-step explanation

Lines LP and QM are parallel, meaning KLP and QMN are supplementary

So KLP +QMN=180

3x+72=180

3x=108

x=36

Answer: B

Step-by-step explanation:

Answer

20 is 5%

1 fifth of hunderd that is 20%

=20%

Answer: Yes

Step-by-step explanation:

Answer:

It should be $50.00.

Step-by-step explanation:

It shows that every 2 mins. adds 20 cents to the bill. I wrote out the numbers and did this:

6 30.60

8 30.80

10 40.00

12 40.20

14 40.40

16 40.60

18 40.80

20 50.00

Answer:

152

Step-by-step explanation:

Just multiply; for example, it says for every 4 minutes 40 cents are added to the cost. If you multiply that times 5 you will get your answer.

Hope this helps

Answer:

60

Step-by-step explanation:

given: length = 10m + width

perimeter = 220

find length of backyard

Solution

let us assume width = x

length = 10 + width

10 + x

perimeter of rectangular backyard = 2( length + width)

= 220 = 2 ( 10 + x + x )

= 220 = 2 ( 10 + 2x )

= 220 / 2 = 10 + 2x

= 110 - 10 = 2x

= 100/2 = x = 50

so, according to above solution and Q.

width = x = 50

length = 10 + width = 10 + x = 10 + 50 = 60

So the answer is 60

Hope this helps and if I'm wrong I sincerely apologize

Answer:

To add two or more monomials that are like terms, add the coefficients; keep the variables and exponents on the variables the same. To subtract two or more monomials that are like terms, subtract the coefficients; keep the variables and exponents on the variables the same.

There are many laws that govern the order in which you perform operations in arithmetic and in algebra. The three most widely discussed are the Commutative, Associative, and Distributive Laws.

Step-by-step explanation:

Answer:

C=18.84

Step-by-step explanation:

C=2*3.14*r

r=diameter/2

Answer: 3 x (-7)       -6 x (-4)       -156 x (  65 )

Step-by-step explanation:

negative times negative= positive

negative times positive= negative

positive times negative= negative

Real world example:

you have -15 dollars in your saving account and want how many times you will still be able to take money out of your account before you owe more than 100 dollars.

Answer:

Step-by-step explanation:

its that answer because i have done this before and know its the answer that is the answer

Answer: $162.50 is the answer

Step-by-step explanation: Multiply 250 by .35 and you get 87.5 which is the amount that is subtracted

Answer:

29

To solve, you must isolate the variable. This means moving the variable and it's coefficient to the other side of the equation with only the same variable on the same side with all the constants on the other side.

If you multiply, divide, add, subtract, square root, exponent both sides of the equation by the same value, that end value stays the same.

Terminology

Variable: Any letter than stands for a value than can be solved and change value. (i.e. x, y, z, a, etc.)

Coefficient: The number right before a variable (without being separated by an operator). It is a multiplication factor for a variable. Basically, it's just a way to express what you are multiplying a variable by.

If the coefficient is 1, it means [variable] * 1. 1[variable]

Subtract 23 on both sides.

29 - 23 = v + 23 - 23

v = 29

Answer: 60

Step-by-step explanation: 12L+1/2=72.5

72.5-24-8.5+20

72.5-24=48.5-8.5=40

40+20=60

Answer:

A = pi(r)^2

A = pi(40)^2

A = 1,600pi sq. ft.

Therfore the answer is C.) 1,600 pi sq. ft.

I hope this helps you!!

Answer:

C - 1600[tex]\pi[/tex] sq. ft.

Step-by-step explanation:

Since the answer has to be in terms of pi, we can exclude that from the equation.

The formula to find the area of a circle is [tex]\pi r^2[/tex] where r is the radius. If we plug in 40 for r, we get 1600[tex]\pi[/tex].

Answer:

$120

Step-by-step explanation:

48 pineapples shared equally by 2 people.

48/2 = 24

Each friend got 24 pineapples.

24 × $5 = $120

Answer: $120

Answer: $120

Step-by-step explanation:

Step 1: Find how many 1 person gets (pineapples per person)

48 pineapples divided by 2 people= 48÷2= 24 pineapples each.

Step 2: Money made by 1 person

He has 24 pineapples to sell because that's how many he is supposed to receive. he sells all of them for $5 each, so the total money he makes is 5x24= $120

Checks:

120÷24= 5

the pineapples are 5 dollars each (this is correct).

Hope this helps!

Answer:

17x-70/5

Step-by-step explanation:

Answer: 0.311

Step-by-step explanation:0.3113 the 3 is lower then 5 so the 1 stays the same

The formula for the surface area of a cylinder is [tex]2\pi rh+2\pi r^{2}[/tex]. Using this, you can calculate that the cylinder's total surface area is 56[tex]\pi[/tex]. But, since Adrian only needs to find the surface area outside of the tire, I'm going to assume that you only need to apply [tex]2\pi rh[/tex] to your problem. Therefore, the answer is 24[tex]\pi[/tex] or 75.4 (rounded to the nearest tenth). I hope this helps!

Answer:

A

Step-by-step explanation:

I think A is the answer because Its the closest one to the plot and what question is asking for

Answer:B

Step-by-step explanation:

Answer:

The scale factor for area is found by squaring the scale factor for length. Thus the scale factor for area is s2. If this is reversed, a method is provided for solving the problem being investigated. The scale factor for area is 2.

Step-by-step explanation:

Answer:

Step-by-step explanation:

PQS and RQS are supplementary

PQS +68=180

PQS =112

x+ 112+TSQ=180

4x=3x+TSQ

TSQ=x which means

2x+112=180

2x=68

x=34

Answer:

1=ab

Step-by-step explanation:

you do mines 9a to both side with will lead you to 1

Answer:

[tex]\sqrt{10}[/tex]

Step-by-step explanation:

5 - 2x^2 = -15

2x^2 = 20

x^2=10

x= [tex]\sqrt{10}[/tex]