Mathematics Middle School

70 POINTS!!! Marta tried solve the system below, but she made a mistake. Read carefully and try to figure out what her mistake was.

Finding Mistakes in a Solution
What was Marta’s mistake? Explain.
will give brainliest

70 POINTS!!! Marta Tried Solve The System Below, But She Made A Mistake. Read Carefully And Try To Figure

Answers

Answer 1

Answer:

she forgot the first part

Also: sorry if its wrong I'm not the best at math

Answer 2

Answer:

The answer is 0

Step-by-step explanation:

Related Questions

Donna has 4 3/4 cups of sugar. She plans to make muffins that take 1 2/3 cups of sugar per pan. Does she have enough to make 2 pans of muffins? Defend your answer.

Answers

The answer is 2 and one half cups is If I’m correct and

Part C. 20pt

What is the unit rate for this situation (Be sue to include units in your response).

Answers

Answer:

Step-by-step explanation:

Transverse wave, motion in which all points on a wave oscillate along paths at right angles to the direction of the wave's advance. Surface ripples on water, seismic S (secondary) waves, and electromagnetic (e.g., radio and light) waves are examples of transverse waves.

Answer:

The number of riders each trip is the unit rate. In this scenario, a unit is a single trip taken by the roller coaster, with a capacity of 20 passengers per trip. As a result, the unit charge per trip is 20 riders.

Step-by-step explanation:

hope this helps!

2. The number of people in a
town n years after the initial
count can be modeled by
the equation p(n)=25,000(0.8)n
where P is the population
and n is the number of years.

b. Is this town growing or
shrinking in population?
By what percentage?

a. What was the population
at the initial count?

c. Write an expression to
predict what the population
will be in 5 years

Answers

Answer:

                       

Step-by-step explanation:

                   

Step 1. Simply the equation
25,000*0.8*n
25,000* 0.8= 20,000n

Therefore if the value of n is any number below 1 (including) then the population will decrease

If the value of n is any number above 1 (not including 1 specifically above 1.25 to show increase because 1.25* 20,000= 25,000) then it will show an increase with 1 it will just be 20,000 that being less then 25,000.


Answer:
-Population at the initial count: 25,000
-Is it increasing or decreasing: It depends on the value of n (explained above)
-By what percent: 80%
-Expression for 5 years: 25,000*0.8*5
- 25,000*0.8*5= 100,000 people



10 × (2.5 + 13.5)
Pleace hurry

Answers

I am pretty sure it is 137.5

10 x (2.5 + 13.5)
=10 x 16
=160

Help asap----------------------

Answers

Answer:

Step-by-step explanation:

a,e,m hope this helps!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

Answer:

the answer is y

Step-by-step explanation:

i think because it is e,i,o,u,a and sometimes y

Petra eats five and three fifths pies in a pie-eating contest. Paulie eats three and fourteen sixteenths pies in the contest. How many more pies did Petra eat?

one and fifty eight eightieths pies
one and seventeen twenty firsts pies
two and fifty eight eightieths pies
two and seventeen twenty firsts pies

Answers

Answer:

one and fifty eight eightieths pies

Step-by-step explanation:

Answer: 1 10/15

Step-by-step explanation:

Which term best describes the graph of y = –2?

increasing

decreasing

constant

positive

Answers

Answer:

It would be constant.

Step-by-step explanation:

Since there is no x value, the line will have no slope and just be horizontal about y= -2.

If we draw the graph we will see that the function is a straight line parallel to the x-axis.

The graph y = -2 is best described as a constant function.

Option C is the correct answer.

What are coordinates in a graph?

The coordinates in a graph indicate the location of a point with respect to the x-axis and y-axis.

The coordinates in a graph show the relationship between the information plotted on the given x-axis and y-axis.

We have,

A function:

y = -2

To graph the function we will find the coordinates of the function y = -2.

For x = 0,

y = -2

For x = 1,

y = -2

For x = 2,

y = -2

For x = 3,

y = -2

We will see that for all x values the y value is -2.

If we draw the graph we will see that the function is a straight line parallel to x-axis.

Thus,

The graph y = -2 is best described as a constant function.

Learn more about coordinates here:

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I’ll give brainliest to the first person to get all of them

Answers

Answer:

line c line c line c line c line c

Step-by-step explanation:

Line C is the correct answer

If Amber pays $55 for a pair of shoes, what would the discount be if the original price for Amber's shoes is $72.00?

Answers

Answer: 76%
Explanation: 55/72.00 x __/100= 5,500
5,500 divided by 72.00= 76.3888889

HELPPPP ME ASAPPPPPPPP(NO NONSENSE ANSWERS!!!)

SLIDE 1 OPTIONS
$157.25
$185
$210
$212.75
SLIDE 2 OPTIONS
$5.80
$6.35
$7.11
$12.55
SLIDE 3 OPTIONS
51
85
127
136
SLIDE 4 OPTIONS
25%
30%
35%
40%
25%
30%
40%
SLIDE 5 OPTIONS

Answers

Answer:

Slide 1

$185

Slide 2

$7.11

Slide 3

136

Slide 4

25%

Slide 5

40%

Answer:

1. $185

2. $7.11

3. 136

4. 25%

5. 40%

Solve 7(y + 2) – (4y – 10) = 44 – 2y + 5
A.y = -5
B.y = 5
C.y = -10

Answers

Answer:

y = 5

Step-by-step explanation:

7(y + 2) – (4y – 10) = 44 – 2y + 5

(7y+14) - (4y - 10) = 49 -2y

3y +24 = 49 -2y

5y +24 = 49

5y = 25

y = 5

Answer:

y=5

Step-by-step explanation:

7(y+2)-(4y-10) = 44-2y+5 distribute on the left and combine like terms on the right side of the equation

7y + 14 -4y +10 = 49 - 2y move every term with a variable on the left side with a change sign and the numbers on the right side

7y-4y+2y =49 -14 -10

5y = 25 divide both sides by 5

y5/5=25/5 so

y=5

Pls and thank you. will get brainiest IF the answer it accurate :p

What is the simplified expression for the expression below? 4(x + 8) + 5(x – 3)
1.) 9x + 5
2.) 9x + 11
3.) 9x + 17
4.) 9x + 47

Answers

#3 is the answer

4x+5x is 96 4*8 is 32 5*-3 is -15 32+-15 is 17
The answer is 3.) 9x + 17

An object travels 4/5 miles in one-half hour. What is its speed?
PLEASE EXPLAIN WHY

Answers

8/5 miles per hour 1.6 mph

The water level of a lake fell by 1 1/2 in. during a 3 3/4 ​-week-long dry spell. Simplify the complex fraction below to find the average rate at which the water level changed every week.
help me

Answers

Answer:

3/2

Step-by-step explanation:

33÷11=3

4÷2=2 which means you devide to obtain that level of water

3/2 is the correct answer

Help anyone?????? <3

Answers

Answer:

B

Step-by-step explanation:

2x+x+3=7x-4x+3

3x+3=3x+3

Infinitely many solutions

Awnser:A

Step-by-step explanation: every problem has a solution and it does not have infinitely answers to it.

1 and three fourths divided by 3
A. start fraction 21 over 4 end fraction
B. 3 and one-fourth
C. 1 and four-sevenths
D. seven twelfths

Answers

Answer: 3 7/12 (three and seven twelfths

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

1 and 3/4 ÷ 3

make 1 and 3/4 an improper fraction (7/4)

(1x4= 4, 4+3=7)

7/4 ÷ 3

3 is equal to 3/1

7/4 ÷ 3/1

keep, switch, flip (reciprocal)

7/4 x 1/3 = 7/12

A swordfish can swim at a rate of 60 miles per hour. How many feet per hour is this? The Shinkansen passenger train of Japan travels at a rate of 300 kilometers per hour. How many meters per hour is this speed?

Answers

Answer:

that is 316, 800 feet per hour for the swordfish

and 300,000 meters per hour for the passenger train

Step-by-step explanation:

multiply 60 by 5,280 because there are 5,280 feet in a mile

multiply 300 by 1000 because there are 1000 meters in a kilometer           *hence the prefix kilo

Swordfish
60 mph * 5,280 feet = 316800 fph
•there are 5,280 feet in a mile

Train
300 kph * 1,000 = 300,000 mph
•there are 1,000 meters in a kilometer

What is the inverse of the function f(x) = 2x + 1?

Answers

Answer:

You can pick any inverse what is F?

Step-by-step explanation:

Answer:

(X-1) divided into 2   (x-1)/2

Step-by-step explanation:

f(x) is the same as y

switch places y and x

x = 2y+1

Solve for y

y= (x-1)/2

If 3x + 2y = 5, what is the value of the expression 6x + 4y - 7?

Answers

Answer:

3

Step-by-step explanation:

x = 1

y = 1

6+4-7 = 3

Answer:

3

Step-by-step explanation:

Drag the numbers below to put them in order from least to greatest:

Answers

Answer:

-16.7, -16.4, -7.5, -4.4, 7, 13

Step-by-step explanation:

Answer:

-16.7, -16.4, -7.5, -4.4, 7, 13.7

Step-by-step explanation:

the farther left a number is on a number line the lesser value it has

I need help, can someone please help me

Answers

Answer:

slope (3,1) using rise over run y-intercept -1

Step-by-step explanation:

Starting at your y-intercept -1 and going up three and 1 to the right you get to your next point on the graph

Need Brainly points

The following shows the process a student used to determine the number of yards in 3,218 meters.

(1 mile = 1,609 meters)
(1 mile = 1,760 yards)

Step 1: 1,609 meters is being multiplied by conversion factor 1 mile over 3,218 meters equals 0.5 mile

Step 2: 0.5 mile is being multiplied by conversion factor 1760 yards over 1 mile equals 880 yards

Step 3: 880 yards

What was the error made in this conversion?

The 1 mile and 3,218 meters in Step 1 should be switched.
The 1,609 meters and the 3,218 meters in Step 1 should be switched.
The conversion factor should be added in Step 2 instead of being multiplied.
The conversion factor should be divided in Step 2 instead of being multiplied.

Answers

Answer:

Step-by-step explanation:3520

b + 11 = -12 solve for b=

Answers

b=-23
explanation: -12-11=-23 put -23 into equation -23+11=-12
b+11=-12
b+11-11=-12–11
b=-23

PLS HELP ME ASAP PLS AND TY

Answers

Answer:

607

Step-by-step explanation:

the answer to the question is -607!

How could i make this sentence longer
The rule of the Right of Occupancy is having a personal right and that right cannot be sold.

Answers

Answer:

It can be understood through the customary rule of the Right of Occupancy, that one's own personal, secluded and dignified right shall remain to be free from the act of being sold.

Step-by-step explanation:

Algebra Need Help Pls. Can someone explain to me how to do this?

Answers

Answer:

y=-3x

Step-by-step explanation:

Mark me as brainliest

What is y?
3/8 × y = (-1/2)

Answers

Answer:

y=-4/3

Step-by-step explanation:

Combine multiplied terms into a single fraction

Multiply all terms by the same value to eliminate fraction denominators

Simplify

Divide both sides of the equation by the same term

Simplify

Y=-4/3 hope this helps

Which partial quotients could be added to find 396 ➗ 12?
A 20 and 8
B 20 and 4
C 30 and 3
D 30 and 8

Answers

Answer:

divide 396 by 12 & you will get 396/12= 33

Step-by-step explanation:

When one number is divided by another number, the result is the quotient

So I think C) 30 and 3 is the best answer :))

The partial quotient of 396 ÷ 12 is 30 and 3.

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

396 ÷ 12

12 x 33 = 396

33 is the quotient.

A partial quotient of 33 can be.

30 and 3.

Thus,

30 and 3 are the partial quotient.

Learn more about expressions here:

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Jessica rented 1 video game and 3 movies for a total of $15.25.
• The video game cost $4.75 to rent.
• The movies cost the same amount each to rent.
What amount, in dollars, did Jessica pay to rent each movie?
Question 4 options:

$2.50


$3.00


$3.25


$3.50

Answers

Answer:3.50

Step-by-step explanation:

15.25-4.75 divided by 3

You divide it and u get ur answer

This unit, you have learned several formulas and equations. Match the formula or equation with what the answer represents.
1.______

100% + percent = or


100% - percent =


2._______-

original x percent =


*when the percent is written as a decimal


3._____

original x (1.00 + percent) = or


original x (1.00 - percent) =


*when the percent is written as a decimal


4.________

new - original x 100% =

___________

original




5._________

| measured - actual | x 100% =

______________

actual


6.

measured - actual =


__________________________________________________________________

Column B

a.formula to find error

b.total change in the percent

c.formula to find the percent of change when given two numbers

d.amount something increases or decreases

e.equation to find the total amount

f.formula to find percent of error

Answers

Answer:

.

Step-by-step explanation:

.

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