MATHEMATICS MIDDLE SCHOOL

All of the following ordered pairs satisfy the function rule y = -3x + 2 except _____.(1, -1)
(4, -10)
(-2, 8)
(-3, 12)

Answers

Answer 1
Answer: (-3,12)Because you substitute the 12 in for y and -3 in for x. Then you do you order of operations and you get 12=11 which is false.

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for each babysitting job, Ashley charges 2.50 dollars for bus fare plus 8 dollars per hour for each hour she works. She charged 30.50 dollars for her last babysitting job. how many hours did she babysit for that job
Jonah had 4 books Stacy had 7 books how many books did they not have
Positive fractions less than 1, with an interval of 1/8 between each pair.
a box of powdered laundry detergent contains 5.2 ounces of detergent. It takes 0.7 ounce of detergent to clean a load of laundry. How many full loads can by cleaned with 3 boxes of this detergent?
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Hi everyone!! Could someone write a real-world problem in which you could graph function? Thanks!! The best ne will win the title of the most brainliest!!

Answers

Madeline is on a diet. She exercises every day in order to lose some weight. she currently has 210 pounds. Make a graph with a number of pounds she loses and with the amount of time she takes (in months) to lose that weight.
Well,

The example I will use will be the relationship between the Celsius scale and the Fahrenheit scale.

The formula for the conversion between Fahrenheit and Celsius:

F= (9)/(5) C+32

We can immediately see that this is a linear equation if we substitute y for F and x for C.

y= (9)/(5) x+32

or

f(x)= (9)/(5) x+32

It is a line that has a y-intercept of (0,32), and has a slope of 9/5.

I have attached the line below.

Solve the system of equations using substitution.
y= 3/4x-7
4x- 6y=50

Answers

\begin{cases} y= (3 )/(4)x-7 \n 4x- 6y=50 \end{cases}\n \n\begin{cases} y= (3 )/(4)x-7 \n 4x- 6((3 )/(4)x-7)=50 \end{cases}\n \n\begin{cases} y= (3 )/(4)x-7 \n 4x- (9 )/(2)x+42=50 \end{cases}\n \n \begin{cases} y= (3 )/(4)x-7 \n 4x- 4(1 )/(2)x =50 -42\end{cases}

\begin{cases} y= (3 )/(4)x-7 \n - (1 )/(2)x =8 \ \ /*(-2)\end{cases}\n \n \begin{cases} y= (3 )/(4)*(-16)-7 \n x =-16\end{cases}\n \n \begin{cases} y= -12-7 \n x =-16\end{cases} \n \n\begin{cases} y= -19 \n x =-16\end{cases}
Y=3/4x-7
4x-6y=50

4x-6y=50
4x-6(3/4x-7)=50
4x-18/4x+42=50
-1/2x=8
x=-16

y=3/4(-16)-7
y=-12-7
y=-19

Ricardo has a marble collection with 54 blue marbles, 24 red marbles,and 18 yellow marbles. He arranges the marbles into equal rows. The marbles in each row will be the same color. How many marbles can he put in one row?

Answers

the answer is 6 because it is the only number other than 2 that u can divide all of these numbers by... I would assume that your teacher wouldn't take 2 as an answer. 6/54=9
6/24=4
6/18=3

2. A home furnishing store sells 6 chairs for $900. Martin buys 2 such chairs for her new home. How much did she spend on the purchase?3. Sam can prepare 20 wall paintings in four weeks. How much time will he need to prepare 80 wall paintings?


4. Sonya can walk 6 kilometers in 3 hours. If she has to walk 10 kilometers, how much time will it take her?


5. You mix 7 tablespoons of vinegar for 4 tablespoons of baking soda to produce a chemical reaction. You use 15 tablespoons of baking soda. How much vinegar do you use?


6. A mint milkshake contains 1.25 fluid ounces of milk for every 4 ounces of ice cream. A strawberry milkshake contains 1.75 fluid ounces of milk for every 5 ounces of ice cream. Which milk shake is thicker? Explain.


7. The ratio of three numbers are 4:5:3. The sum of the numbers is 84. What are the 3 numbers?


8. You buy 10 pounds of bird seed at Store A for $11.50. Your friend buys 15 pounds of bird seed at Store B for $19.50. How much less would you spend by buying 20 pounds of bird seed at the store with the better deal?

Answers

[MA]:

3:  80 weeks.

4: 5 hours

5: 26.25 teaspoons

The explanation:

3.

1st week = 20 walls

2nd week = 20 + 20 = 40 walls

3rd week = 20 + 20 + 20 = 60 walls

4th week = 20 + 20 + 20 + 20 = 80

Therefore, in 4 weeks. 80 walls in total will be painted.

4.

6 km in 3 hours

10 km in x hours

Proportion:

6 - 3

10 - x

Cross multiplication:

6x = 3 * 10

6x = 30  \  divide by 6

x = 5

It will take 5 hours.

5.

Tablespoon of  vinegar taken (v) = 7

Tablespoon of baking soda taken (b) = 4

Therefore, ratio between v and b: 7 : 4

Tablespoon of vinegar taken (v) = x

Tablespoon of baking soda taken (b) = 15

Therefore, ratio between v and b = x : 15

7 : 4 : : x : 15

Produce of extremes = Product of means

26.25 teaspoons

Writer's note: Hope this helps!

[xArtsy}

Whitch expression is equivlent to the expression
7(3x-2) + 4(x+5)

Answers

Answer:

\large\boxed{7(3x-2)+4(x+5)=25x+6}

Step-by-step explanation:

7(3x-2)+4(x+5)\qquad\text{use the distributive property}\ a(b+c)=ab+ac\n\n=(7)(3x)+(7)(-2)+(4)(x)+(4)(5)\n\n=21x-14+4x+20\qquad\text{combine like terms}\n\n=(21x+4x)+(-14+20)\n\n=25x+6

Answer:

\Huge \boxed{25x+6}

Step-by-step explanation:

\large \textnormal{Distributive property}, \large \textnormal{A(B+C)=AB+AC}.

\displaystyle 7(3x-2)=21x-14

\displaystyle 21x-14+4(x+5)

\displaystyle 4(x+5)=4x,5* 4=20, 4x+20

\Large\textnormal{Solve to find the answer.}

\displaystyle 21x-14+4x+20=25x+6

\Large \textnormal{Correct answer is \boxed{25x+6}.}

Calculate the scale factor from the smaller triangle to the larger triangle (picture above,please help)

Answers

x=12 and y=40. If you divide 20 by 50 you get 2.5 which is the scale factor.  To find the values of x and y you need to either multiply or divide 2.5 from the given values.
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