Mathematics Middle School

please help i really need help ill give breinliest

Answers

Answer 1

i believe it is the second one on the top row not sure

Answer 2

Second one on top row

Related Questions

Find the solution to the system of equations below. 7x+3y=12 and 7x-3y=30

A.(7, 3)
B.(-3, 3)
C.3, -3)
D.(2, -2)

Answers

Answer:

C. (3, -3)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS Equality Properties

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define systems

7x + 3y = 12

7x - 3y = 30

Step 2: Solve for x

Eliminate y: 14x = 42Isolate x: x = 3

Step 3: Solve for y

Substitute in x: 7(3) + 3y = 12Multiply: 21 + 3y = 12Isolate y term: 3y = -9Isolate y: y = -3

And we have our final answer!

how may solutions does 10 + 5/15 = 4 ( if none say no solution)

Answers

Exactly one solution

Given the equation 11.5 - 3y = -48.5, what are the equivalent equations? Choose all that apply.

Answers

Answer: 60-3y=0

-3(y-8.3333)= -48.5

Which of the following describes a situation for the inequality: 3w + 9 ≤ 21

A. A girl get $3 for every box of cookies sold plus 9 dollars for trying. She makes either $21 total or just below that amount.

B. A girl get $3 for every box of cookies sold plus nine dollars for trying. She makes either $21 total or more than that amount.

C. Girl scout cookies are good, just pay the girl! (this is not the correct answer.)

D. A girl get $9 for every box of cookies sold plus 3 dollars for trying. She makes either $21 total or just below that amount.

Answers

Answer:

Step-by-step explanation:

She wouldn't have sold just one box. Seven or more makes much sense.

Answer: The answer would be A. A girl gets $3 for every box of cookies sold plus 9 dollars for trying. She makes either $21 total or just below that amount.

Step-by-step explanation:

w is the box and when a number is beside a letter it is multiplication and then 9 dollars for trying. the < with the underline means that it is the same amount or less.

Please help me with this. Thank you!

a____

B____

c___

2____

3___

Answers

Answer:

i have done these equations before but i cannot make out what the equation is

Step-by-step explanation:

Pls help I asked 2 time so far and no one I need help i will mark brainliest

Answers

Answer:

x = 33

Step-by-step explanation:

This picture shows a supplementary angle which means:

angle 1 + angle 2 = 180°

In order to solve for x, you need to add both the angles

(2x + 1) + (4x - 19) = 180° start by simplifying this equation by adding like terms

6x - 18 = 180° you can solve this like a regular inequality now, add 18 to 180°

6x = 198 now divide 6 by 162

x = 33

X=27 please mark me brainliest thanks :D

Dan and Alan take turns mowing the grass of a yard that is 2400 square yards in area. Dan takes an hour to mow the whole lawn using his old mower. Alan only takes 40 minutes to mow the whole lawn using his new mower.

As you answer the following questions, don't forget to show your units!

A. How much lawn does Dan mow in a minute?

B. How much lawn does Alan mow in a minute?

B. How many more square yards does Alan mow in a minute than Dan?

Answers

Answer:

Step-by-step explanation:

If f(x) = 8x^3 - 6x^2 - 4x + 5, find the value of f( -2).

Answers

Answer: -75

Step-by-step explanation:

Plug in -2 into the equation.

8(-2)^3 - 6(-2)^2 -4 (-2) + 5

i’m pretty sure it’s -75 !

can someone help me out? :P

Answers

Equation:
Y=30t

Explanation-
1hr:30miles

Which symbol would make this statement true?

6 __ 8

1. =
2.
4. ≤
5. ≥

Answers

Answer:

Step-by-step explanation:

because 8 is a higher number than 6

Answer:

4.<

Step-by-step explanation:

8 is greater than 6

To be able to do the problem 5(10 + 4) mentally, Zack does 50 + 20 instead of 5(14).
Zack is using which of the following properties?
1.) distributive
2.) inverse
3.) associative
4.) commutative

Answers

Answer:

1. Distributive

Step-by-step explanation:

This is because you multiply the number outside the parentheses into the numbers inside the parentheses.

Hope it helped.

Answer:

the answer is 1)

Step-by-step explanation:

4x9.4 in an area model

Answers

37.6 but i dunno how to but it into a model im sorry!!!

Answer:

37. but i really dont know

Step-by-step explanation:

Maria said that -4n + 3 +9n - 4 is equivalent to 4n. What error did maria likely make?

Answers

Maria combined all of the factors, which were not all like terms. She should’ve did -4n+9n and 3-4 to get 5n-1

The error that Maria did was combining all the factors in the algebraic expression without collecting the like terms to a particular side to solve for the variable (n).

What is an Algebraic expression?

Algebraic expression involves solving numbers with variables with the use of arithmetic operations e.g.

AdditionSubtractionMultiplicationDivision

Claim:

Maria Said that:

-4n + 3 + 9n - 4 = 4n

If we ignore the like terms and assume all numbers have a variable (n);

Then, we have:

-4n + 3n + 9n - 4n = 4n

Learn more about Algebraic expressions here:

https://brainly.com/question/4344214

A 3-pack of light bulbs costs $3.45. A 4-pack of the same light bulbs costs $4.20.
Which pack has better value?

Answers

Answer:

The 4-pack light bulbs

Step-by-step explanation:

Price of a light bulb in 3-pack

= 3.45÷3

= $1.15

Price of a light bulb in 4-pack

= 4.20÷4

= $1.05

Suppose that a bike rents for $4 plus $1.50 per hour. Your rented a bike to ride around Central Park in New York City, you picked up the bike at 11:00 am and returned the bike at 3:00 pm. How much did you bike rental cost?

Answers

Answer:

9.5 hours .

Step-by-step explanation:

I think this is the correct answer if not let me know.

Answer:

$22

Step-by-step explanation:

It is four hours from 11 to 3 so you multiply $4 times the 4 hours to get 16 then you multiply 1.50 by four to get 6 add that 6 to the 16 to get 22

‍♀️‍♂️help me plzssssssss

Answers

Answer:

Answer = 22.26

Step-by-step explanation:

———-

106

2120

————-

2226

Answer = 22.26

The surf instructor has an initial fee of $12 and charges $8 per hour for lessons, which is represented by the equation y = 8x + 12, where x is the number of hours and y is the total cost. The instructor gives 32 hours of lessons a month to Sandra and 24 hours of lessons a month to Bela. What is the total amount the instructor makes in a month? Sandra: y = 8 (32) + 12. y = 256 + 12. y = 268. The instructor receives 268 dollars a month from Sandra. The instructor makes $ a month.

Answers

268 + 8(24)+12
268 + 204

instructor makes $472 a month

Answer:

$472

Step-by-step explanation:

I got it right on edge.

John bought 2 video games for $46 from Game Stop. Then, he went online to Amazon and bought 3 video games for $70.50

Which store sells the cheapest video game? Just say the answer for a free brainiest

Answers

Answer:

Game stop is selling the cheaper video game.

Step-by-step explanation:

game stop=$23 each game amazon=$23.5 each game.

Answer:Game Stop is cheaper

Step-by-step explanation:

2 videogames cost 46$ 46 x 2 = 92

3 x 70.50 = 211.5

Please help will give brainliest i need this its due wednesday and there are like 45-50 questions

Answers

Answer:

i think its a

Step-by-step explanation:

sorry if im wrong just stressd out. good luck.

Answer:

The anwser is a

Step-by-step explanation:

Because on the red point it 24

The image shows a right triangle in the coordinate plane. What is the measure of segment DF?

Answers

Answer:

10.8 units

Step-by-step explanation:

Answer:

10.8

Step-by-step explanation:

Its True

Please Help!
Simple interest:
Use formula I=PRT
Find t when
i=$129.6
r=4%
p=$540

Answers

Answer:6=t

Step-by-step explanation:

129.6=540*0.04*t

129.6=21.6*t

6=t

Answer:

t=6 or 6=t

Step-by-step explanation:

Doors for the small cabinet are 12.5 inches long. Doors for the large cabinets are 2.9 times as long as the doors for the small cabinets. How many large doors can be cut from a board that is 11 feet long?

Answers

Answer:

36.25

Step-by-step explanation:

Which of the following word pairs correctly completes the sentence below? The _______ energy from the _______ arrives in the form of visible and invisible light.

A. Sun's, Earth
B. Earth's, Sun
C. Moon's, Earth
D. stars', Moon

Answers

im thinking the Earth’s energy from the Sun arrives in the form of visible and invisible light

Answer:

it C

Step-by-step explanation:

I only know + I don’t know - pls helpp!!

Answers

Answer:

x=31

Step-by-step explanation:

Since these angles are on a straight line, they are supplementary (combine to make 180 degrees. Therefore we can set up an equation to find x.

(5x-16)+(x+10)=180

Drop the parentheses.

5x-16+x+10=180

Combine like terms.

6x-6=180

Add 6 to both sides.

6x=186

Divide both sides by 6.

x=31

HTH :)

Answer is 31

How you solve this is:
The whole line equals to 180 degrees so add 5x-16+x+10=180 that’s will be your equation. And then subtract 10 to 180 so then it will be 5x-16+x=170 then add 16 to 170 and you will be left with 5x+x=186 add the x’s together and get 6x divide 6 to 186 and then x=31

Broody spent $260 on 4 chairs. To find out how much he spent on each chair, he did the following work in long division. did he do the problem correctly why or why not

Answers

Answer:

i think it is C

Step-by-step explanation:

if not than sorry

Answer:

C. Yes, he worked the problem correctly

Step-by-step explanation:

260 / 4 = 65 and he did the work as he was supossed to

4 goes into 26 6 times and 4 goes into 20 5 times which = 65

So he got it right!

can someone help me out? :P

Answers

9514 1404 393

Answer:

181

Step-by-step explanation:

The tagged deer seem to represent about 17/110 of the population. Since there are 28 deer with tags, the population (p) is estimated to be ...

110/17 = p/28

p = 28(110/17) ≈ 181

There are about 181 deer in the woods.

need helpp fastt plss will give brainliest too who is correct plss helpp

Answers

Answer:

-13, because the temperature is -13 degrees Celcius. An integer is a number that can be expressed as a non-fractional number, so -13 would be the answer.

Which translation matches the inequality?
x/7.4 ≤ 19.8
A) The difference of a number and 7.4 is less than 19.8.
B) The quotient of a number and 7.4 is at most 19.8.
C) The difference of a number and 7.4 is no more than 19.8.
D) The quotient of a number and 7.4 is at least 19.8.

Answers

B since at most represents the less than or equal to sign.

i believe the answer is B. th

The perimeter of a square is 80-60y units. Which expression can be used to show the side length of one side of the square?
A. 16(5-4y): Each side measures 5-4y units.
B. 16y(5-4): Each side measures 5-4y units.
C. 4(20-16y): Each side measures 20-16y units.
D. 4y(20-16): Each side measures 20-16.

Answers

D my guys trust meh okay

Which of the following number lines represents the solution to m/-2 - 7 = -9?

Answers

Answer:

Step-by-step explanation:

the answer is a. (the first one)

Number lines are used to represent relationship between numbers at regular intervals

The number line that represents the equation [tex]\frac{m}{-2} - 7 = -9[/tex] is number line (c)

The equation is given as:

[tex]\frac{m}{-2} - 7 = -9[/tex]

Add 7 to both sides of the equation

[tex]\frac{m}{-2} = -2[/tex]

Multiply both sides of the equations by -2

[tex]m = 4[/tex]

This means that, the solution to the equation is [tex]m = 4[/tex]

The number line that represents [tex]m = 4[/tex] is number line (c)