Mathematics High School

Comparing Methods to solving systems.

x -y =-2
7x +2y =-5

Solve it by graphing method

Answers

Answer 1

Answer:

[tex]x = - 1 \\ y = 1[/tex]

Step-by-step explanation:

[tex]x - y = - 2 [/tex]

[tex]x = y - 2[/tex]

[tex]7x + 2y = - 5[/tex]

[tex]7(y - 2) + 2y = - 5 \\ [/tex]

[tex]7y - 14 + 2y = - 5[/tex]

[tex]9y = 14 - 5[/tex]

[tex]9y = 9[/tex]

[tex]y = \frac{9}{9} = 1[/tex]

[tex]x = y - 2 = 1 - 2 = - 1[/tex]

Related Questions

simplify 2x+1-2x/2x+1

​

Answers

Answer:

1 = 2+ 348/46 (56+35)

Step-by-step explanation:

help? i cant understand

Answers

Well a triangle equals 180 degrees so you must subtract 24 degrees and 88% to get the angle of

Determine the value of x in the figure shown.

Answers

Hope it will help you..............

Plzzz someone help me with these 2 problems I will give you 33 points

Answers

The first one is 45 feet and 125 is the second one I’m pretty sure

She ran 52.16 seconds per 400 meters how many seconds did it take her to run 100 meters?

Answers

Answer:

13.04

Step-by-step explanation:

since 100 is 1/4 of 400, you divide 52.16 by 4

Solve for n: 2n = n + 3

Answers

Answer:

Step-by-step explanation:

Here you go mate

Step 1

2n=n+3  Equation/Question

Step 2

2n=n+3  Simplify

2n=n+3

Step 3

2n=n+3  Subtract n

answer

n=3

The value of n is given by the equation n = 3

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

Substituting the values in the equation , we get

2n = n + 3   be equation (1)

On simplifying the equation , we get

Subtracting n on both sides of the equation , we get

2n - n = 3

n = 3

Therefore , the value of n is 3

Hence , the equation is n = 3

To learn more about equations click :

https://brainly.com/question/19297665

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One week, Paige earned $165.75 at her job when she worked for 13 hours. If she is paid the same hourly wage, how many hours would she have to work the next week to earn $318.75?

Answers

Answer: 25 hours

Step-by-step explanation:

From the question, we are informed that Paige earned $165.75 at her job when she worked for 13 hours. This means that her hourly rate will be:

= $165.75 / 13

= $12.75.

The number of hours that she would have to work the next week to earn $318.75 will be:

= $318.75 / $12.75

= 25 hours

Help please ?????? I don't understand

Answers

Answer:

It's going up by a difference of 70, & 2.

Step-by-step explanation:

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.

On the left triangle, the shorter side is labeled 4 inches and the longer side is labeled 10 inches. On the right triangle, the shorter side is labeled x inches and the longer side is labeled 20 inches.

The two triangles above are similar. Find the value of x. Be sure to explain your steps.

Answers

Answer:

8

Step-by-step explanation:

We are dealing with similaraty and similar shapes length are in proportion so we are going to set up an proportion.

Length of left triangle small side/ Length of left triangle long side= length of right triangle small side/length of right triangle long side

4/10=x/20

Cross multiply: 10x=80

x=8

Answer:

x = 8 inches

Step-by-step explanation:

As the triangles are similar, their corresponding sides will have same ratio:

left short side /right short side = left long side / right long side

or simpler

s₁/s₂ = l₁/l₂

Substitute values to find the missing one:

4/x = 10/204/x = 1/2x = 4*2x = 8

The missing side is 8 inches long

The ratio copper and zinc in an alloy is 5:7. if the weight of copper is 33.5 g, what is the weight of zinc.?
please answer this question. will give you brainliest. please. ASAP. ​

Answers

Answer:

19.5416g

Step-by-step explanation:

5+7 =12

33.5/12 = 2.7916

2.7916 x 7 = 19.5416g

Step-by-step explanation:

please help!! ill give ten points

Answers

Answer:

its f

Step-by-step explanation:

The internal measures of a cuboidal room are 9m, 5m and 6m respectively. Find the total cost of
whitewashing all four walls of a room, if the cost of white washing is ₹ 5 per sq.m. What will be the cost of white washing if the ceiling of the room is also whitewashed.

Answers

Answer:

₹ 1290

Step-by-step explanation:

The total surface area of the room = 2(LW + WH + LH)

TSA = 2(9*5 + 9*6 + 5*6)

TSA = 2(45 + 54 + 30)

TSA = 2(129)

TSA = 258

Hence the total surface area of the room is 258m²

If 1m² = ₹ 5

258m² = 5(258) = ₹ 1290

The cost of white washing if the ceiling of the room is also whitewashed is ₹ 1290

when you spin a 2D triangle, it looks like a 3D pyramid. true or false

Answers

Answer:

False

Step-by-step explanation:

False?? Sry if I’m wrong

What is the equation of the line that passes through the points (2, –1) and (6, 1)?

Answers

Answer:

y = 2/4x -2

Step-by-step explanation:

please help it's due today

Answers

Answer:

one pound of meat is $3.89

Step-by-step explanation:

93.36/8=11.67

11.67/3=3.89

Answer:

it is now by this

x^2 by jai ieye play free fire boyahh

Which set of ordered pairs below is a function?

I. {(3, 3), (6, 1), (2, 3)}

II. {(4, 7), (2, 8), (4, 2)}

III. {(9, 6), (3, 1), (7, 3)}

Answers

The answer is (9,6), (3,1), (7,3)

Can someone help me pleas

Answers

Answer:

2)6h+9c+6

Step-by-step explanation:

3(2h+3c+2)

3*2h=6h

3*3c=9c

3*2=6

6h+9c+6

Triangle D E F is shown. Angle D E F is a right angle. The length of hypotenuse D F is 5 StartRoot 2 EndRoot and the lengths of sides D E and E F are 5.
Given △DEF, which is not equal to cos(F)?

sin(F).
sin(D).
tan(F).
cos(D).

Answers

Answer: tan(F)

Step-by-step explanation:

Answer: C). tan(F)

Step-by-step explanation:

WILL MARK YOU BRAINLIEST

Answers

Answer: 4

Step-by-step explanation:

Answer:

PZ = 4

because P is the centre of XYWZ

=> PZ = 1/2.XZ

WP = 1/2. WY

=> PZ + WP = 1/2.(XZ + WY) = 1/2.24 = 12

=> PZ = 12 - WP = 12 - 8 = 4


HELP!! Mr. Posey is buying a baseball bat that normally cost $160. It is now on sale for 24% off. If sales tax is 10%, how much will he pay for the baseball bat?

Answers

Answer:

he will pay $133.10

Step-by-step explanation:

Can any kind soul help me ASAP


The blue is the shaded region​

Answers

Answer:

200π/3 cm^2

Step-by-step explanation:

The answer is explained in the above photo

Step by step explanation

Answers

Answer:

[tex]\huge\boxed{\tt{Slope = 0}}[/tex]

Step-by-step explanation:

[tex]\sf (x_{1},y_{1} ) = (6,-5)\\\\(x_{2},y_{2}) = (1,-5)[/tex]

[tex]\sf Slope = \frac{y_{2}-y_{1}}{x_{2}-x{1}} \\\\Slope = \frac{-5-(-5)}{1-6} \\\\Slope = \frac{-5+5}{-5} \\\\Slope = \frac{0}{-5} \\\\Slope = 0\\\\\rule[225]{225}{2}[/tex]

Hope this helped!

~AH1807
The a kappa OS PS welp Jack usando ican Italian videos

write the equation of the line passing through points (2,-2) and (1,0) in the slope intercept form​

Answers

Answer:

y=-2x+2

Step-by-step explanation:

Just follow the slope-intercept form formula-

Formula: y=mx+b

Key:

y = y-coordinate

m = slope

x = x-coordinate

b = y-intercept

Let me know if you have any questions, hope this helps! (:

pls help!!
what would the answer be when rounded to one significant figure.​

Answers

2.3^2+4.1^2= 22.1
That should be right my bad if it’s not

Given the statement "r varies jointly as s and t". if r =16 when s = 4 and t =6, what is the constant of the variation?​

Answers

Arrangements for weddings would have been with the local church. Weddings were always a religious ceremony, conducted by a minister. The religions varied but the legal process prior to the wedding was always the same. There were no Registry Office marriages or marriages conducted by a Justice of the Peace. The first stage was Crying the Bann

00:00
Mr. Herr pays $9 for 2.5 pounds of chicken at the grocery store. What is the cost per pound?

Answers

Answer:

3$

Step-by-step explanation:

Three times a day, Dylan mixes 2 ounces of protein powder into a shake. How many days can he make all three shakes from his 5-pound container of protein powder? Remember, there are 16 ounces in a pound. Enter your answer in the box.

Answers

Answer:

13 days

Step-by-step explanation:

To calculate this we first need to find the total number of ounces in the container. We do this by multiplying the total number of pounds in the container by 16oz

5 * 16oz = 80oz

Since Dylan is making three 2oz shakes per day that would mean he is using a total of 6oz (2oz*3) per day. Therefore, in order to find out how many days the container will last we simply divide the total amount of protein powder in the container by the amount he uses every day.

80oz / 6oz = 13.33 days

The container will last 13.33 days but since we cannot count a percentage of a day, then we need to round down to the day in which he will no longer be able to make the three shakes which are 13 days.

Answer:

13

Step-by-step explanation:

no

Jan 16, 3:12:20 PM
Subtract 3.x2 + 8x from 9x2 + 3x – 8.

Answers

Answer:

Step-by-step explanation:

ok so do this

9x² + 3x - 8 - (3x² + 8x)

distribute the negative sign

9x² + 3x - 8 - 3x² - 8x

simplify

6x² - 5x - 8

hope this helps <3

if m=7 then what is 5m-6

Answers

Answer:

29

Step-by-step explanation:

5(7)-6

35-6

29

Answer: 29

Explanation: you substitute m with 7, so
5(7)-6
5 • 7 = 35
35 - 6 = 29

What is 352 beats in 4 2/5 minutes please help and tell me step by step please

Answers

Answer:

352/4.4 =80

Got it?

Please give me Brainly

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