Mathematics Middle School

The dinosaur's tail bones are at the solution point to the system of equations below.
–2x – 7y = –250
4x – y = 140
Every time you click a point using the CPS, the equations below will update. Remember, the solution is the point that makes both equations true.
–2( 1 ) – 7( 36 ) = -254 X
4( 1 ) – ( 36 ) = -32 X

Answers

Answer 1

Answer:

x = 41

y = 24

Step-by-step explanation:

Systems of equations is,

-2x - 7y = -250 ------(1)

4x - y = 140 ------(2)

Equation (1) multiplied by 2 then added to equation (2)

 -4x -14y = -500

(+)   4x - y = 140  

         -15y = -360

            y =

           y = 24

by putting y = 24 in equation (2),

4x - 24 = 140

4x = 140 + 24

x =

x = 41

For x = 41 and y = 24 both the equations are true.

Equation (1),   -2(41) - 7(24) = -250  [True]

Equation (2),   4(41) - (24) = 140  [True]

Step-by-step explanation:

Related Questions

Whit usually drives 5/8 mile to work on the expressway. When the traffic is bad he takes another route that is 7/8 mile long. How much shorter is his usual route?

Answers

His first way is 2/8 shorter than his second way
His first route was actually 2/8 mile shorter than his second route!

When is the additive relationship used? Select all that apply.
A. When subtracting the same amount to an x-value.
B. When dividing the same amount to an x-value.
C. When multiplying the same amount to an x-value.
D. When adding the same amount to an x-value.

Answers

Answer:

your answer is for sure D but I think C is also the answer

Step-by-step explanation:

Additive relationship are two quantities can be expressed as related to each other through addition. It can be written as y = x + a, where y is related to x through the addition of a constant, a. The value for a may be positive or negative.

D and c I also think

Which is the greatest rate? 2.3% 0.99% 2.25% 1.1%

Answers

Answer:

2.3%

Step-by-step explanation:

Answer : it’s 2.3%
Explanation:

Simplify the following expression. (1/7 + 3/8) + (2/9x - 1/8)

Answers

Answer:

2/9x+11/28

PLZ MARK ME BRAINLIEST

ILL GIVE BRAINLIEST.

This is a simple graph, but I want to know if I’m right. If the line goes through the origin does that automatically mean it’s positive?
And when it doesn’t go through the origin does that mean it’s automatically negative?
THANK YOU.!

Answers

Answer: This is a negative graph and it is proportional because it goes through the origin.

Step-by-step explanation:

Just beacause it goes through the origin does not mean it will be positive nor negative, if the line goes from the top left of the grid slanted down, it is negative. If the line goes from the top right of the graph slanted down, it is positive. It is proportional because it is a straight line that goes through the origin.

Answer:Under↓↓↓

Step-by-step explanation:

Ok so in this case it's a negative slope, because the line is going from left to right.

If the line was going form right to left then It would be a positive slope.

What symbol makes this statement true?

5 ___ - 6

A
<

B
≥

C
>

D
≤

Answers

the symbol that would make it true would be >

Answer:

C

5 > (- 6)

Step-by-step explanation:

Five is greater than negative six.

A number line going from 0 to 4 in increments of 1. There are 3 equals spaces between each number.
Find: 11
3
÷ 2
3

The quotient is 5 and
.

Answers

Answer:

11/3 divided by 2/3 = 5.5 or 11/2

Step-by-step explanation:

Answer:

1/2

Step-by-step explanation:

xd

what is 20+20. i need an answer now

Answers

20 plus 20 equals 40 so answer: 40
40 because you add 20 to 20

Which value of t is a solution to this equation?
t–10=1

Answers

Answer:

t=11

Step-by-step explanation:

10+1=11

to check

11-10=1 YUP

Answer:

11

Step-by-step explanation:

10+1 would  equal 11 so 11-10=1        11

                                                   10        1       Fact families

What is 4.37 multiplied by 0.68?

Answers

Answer: 4.37 multiplied by 0.68 is 2.9716.

4.37×0.86=2.9716

Hope this helps!

The answer is 2.9716

WHICH EXPRESSTIONS ARE EQUIVILENT TO 4. (7.y)?

HURRY

Answers

i think it’s 1,2, and 4

Answer:

4(3a+8) this is the answer I believe

The sum of two numbers is 225. The difference of the same two numbers is 35. Find the 2 numbers.

Answers

Answer:

30 and 195

Step-by-step explanation:

The two numbers are 130 and 95.

what is 45x 56y I need to find the slope?

Answers

Answer:

y=x+_ ///  slope is 1 tho

Step-by-step explanation:

well if its (4,5) and (5,6)

slope intercept form: y=mx+b

slope: y2-y1/x2-x1

6-5/5-4=1/1= 1

y=x(1x)+__ i dont remeber

What is 5x+y=45 in slope intercept form?

Answers

Answer:

y=-5x+45

Step-by-step explanation:

slope intercept form is : y=mx+b

5x+y=45

answer: y=-5x+45

How was Cassie’s family different from the other families in the area? (A) They were originally from Illinois. (B) They were wealthy and educated. (C) They owned the land they lived on. (look up Roll of Thunder, Hear me cry) only read the first chapter ill be posting questions and if you answer this question ill give u 10 free brainiests !!

Answers

Answer:

B

Step-by-step explanation:

B I do believe (Brainly needs 20 characters for me to answer:)

PLEASE HELP ME MY BRAIN CAN'T TAKE IT: Lin’s family has completed 70% of a trip. They have traveled 35 miles. How far is the trip in miles?

Answers

Answer:

Okay so, 70% of a trip.

Divided 35 by 7, and you get 5. Therefore I think 5 miles is 10% of the trip. So, the entire trip would be 50 miles. SORRY IF THIS IS WRONG

Step-by-step explanation:

50 because 35/50 is .70 or 70%. You can find this by doing 35/0.70

Select the sentence that represents the equation below. 4x−8=2(2x−3)

Question 9 options:

A. Four times a number less than eight is equal to two times the difference of double
that same number decreased by three.

B. Eight less than four times a number is equal to two times the difference of three minus double that same number.

C. Eight less than four times a number is equal to two times the difference of double that same number decreased by three.

D. Eight minus four times a number is equal to two times the difference of double that same number minus three.

Answers

Answer:

the answer is c, that represents the equation

Answer:

Pretty sure it's B.

(12.9−3.1)×6.2−2+[tex]4^{3}[/tex]

Answers

Answer:

122.76

Step-by-step explanation:

The table lists recommended amounts of food to order for 25 party guests. Nathan is hosting a graduation party for 40 guests. There will also be guests stopping by for a short time. For ordering​ purposes, they will count each of the 45​ "drop-in" guests as half a guest. How much of each food item should Nathen order?
will make branliest!!

Answers

Answer:

63 pieces of chicken 9.73 pounds of deli meat and 28.49 pounds of lasagna

Step-by-step explanation:

There will be approximately 62.5 guests but you cant have half of a person so lets round up to 63 just to be safe and we will round

He needs to order 2.65 orders so he doesn't have to much extra.

24x2.65=63.6

3.67x2.65=9.7255

10.75x2.65=28.4875

i hope this helps

the product of c and 2

Answers

Answer:

Step-by-step explanation:

C×2

=2c

A cookie recipe calls for 2.5 cups of raisins in order to make 2 dozen
cookies. How many cups of raisins would be needed to make 72 cookies?

Answers

Answer:7

Step-by-step explanation:

U have to simplfly the thing

Answer:

7.5

Step-by-step explanation:

72 is six dozen, took 2.5 and multiplied it by 3 and got 7.5. Please mark brainliest!!!!!!! And have a good day!

How do I use Perfect Squares to estimate the Square Root of a number?

Answers

Answer:

????????

Step-by-step explanation:

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

y+16= -8
Another Question heheh

Answers

Answer:

y = -24

(mark me brainliest)

y=-24
To solve this you need to get y by itself so you have to move 16 to the other side. To do this you are doing to do the opposite of what it says so since on that side it’s addition you are going to subtract. Subtract 16 from 16 which cancels it out, then subtract 16 from -8 to get -24. Now you have y=-24

For what value of b, would the equation 3/4(12x−9)+b/4=5−3(2−3x) have infinitely many solutions?

b = ____

Answers

B=23
It may even be wrong

When the value of b is 23 then the equation 3/4(12x−9)+b/4=5−3(2−3x) have infinitely many solutions.

When does a system of linear equation have no solution?

When both the lines(represented by both the equations) are parallel and not coincident, then that system of linear equations have no solutions as there is no common point on both line.

If they are coincident, then there will have infinite solution since in that case, they will have infinite points in common.

Thus, if two lines are not in any of above case, they intersect at single point and in that case, the considered system of equation has unique single solution.

The equation 3/4(12x−9)+b/4=5−3(2−3x) have infinitely many solutions.

When b = 23 ,

3/4(12x−9)+b/4=5−3(2−3x)

When the value of b is 23 then the equation 3/4(12x−9)+b/4=5−3(2−3x) have infinitely many solutions.

Learn more about the case of 'no solution' here:

https://brainly.com/question/26254258

#SPJ6

Determine the value of the expression below.
7^2-9
----------
3+2

Answers

Answer:

1. 7^2-9 = 40

3+2 = 5

40 / 5

8

Yesterday, Grace drove 20 1/4 miles. She used 11/4 gallons of gasoline. What is the unit rate for miles per gallon?

Answers

Answer:

7.363636 miles per gallon

Step-by-step explanation:

90 divided by 0.36 .

Answers

Answer:

250

Step-by-step explanation:

(90)/(36/100) = (90)*(100/36) = 9000/36 = 250

Answer: The answer to this equation is 250

Step-by-step explanation:

THE TRUE STATEMENTS ARE________ , _________ and _________ .
please help I really need help

Answers

Answer:

a,b,e

Step-by-step explanation:

I think it’s a e b for the answer.

Danielle bought a new diary for $12.80. She paid with a $20 bill. How much change did she get back? A. $32.80 B. $8.20 C. $7.20 D. $7.10

Answers

Answer:

c

Step-by-step explanation:

C

Steps:

$20 convert to decimal which is 20.00

20.00 - 12.80 = 7.20

Which decimals are greater than 0.81? Check all that apply. 1.01 0.9 + 0.07 0.7 + 0.09 (5 × 0.1) + (8 × 0.01) (8 × 0.1) + (5 × 0.01)

Answers

Answer:

, 0.7+0.9 and 1.01

Step-by-step explanation:

0.9+0.7 is 1.6 so its larger because it has a whole number and 1.01 is auto larger

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Can someone fill this out? Find the solution to the system of equations.3x + 2y - 4z= -7x - 4y + 3z = 102x + 2y - 3z= -5 If y=15 when x=5, find y when x=7, given that y varies directly with x. The steps in the writing process include:A. editing, drafting, feedback, and prewriting.B. brainstorming, outlining, drafting, editing, feedback, and makingfinal changes.C. brainstorming, editing, feedback, and drafting.D. brainstorming, stressing out, throwing away your paper, startingover, and editing. 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