Mathematics High School

## Answers

**Answer 1**

**Answer:**

y = -2x -2

x + 2y = 2

2x + y = -2 } x1

x + 2y = 2 } x2

2x + y = -2 } we eliminate 2x

2x + 4y = 4 } same signs subtract and different add respectively

-3y = -6

-3 -3

y = 2 (x , 2) we reserve

2x + (2) = -2 we take on the first equation and replace 2 on a coordinate for y

2x = -2 - 2

2x = -4

2 2

x = -2 (-2,2)

x y

**Answer 2**

**Answer:**

( -2, 2)

**Step-by-step explanation:**

There are many ways to solve this system of equations, but for this one, I chose graphing. The picture for the graphs are shown below.

1) First, let's graph the first equation since it is already in slope-intercept form. By looking at it and using our knowledge of y = mx + b format (with m as the slope and b as the y-intercept), the slope is -2 and the y intercept is -2. Let's mark (0,-2) on our graph and use our slope of -2 to graph more points and draw a line.

2) Next, let's transform the second equation into y = mx+b format so we can graph it easily. All we need to do is isolate y on the left side like so:

[tex]x + 2y = 2\\2y = -x+2\\y = -\frac{x}{2} + \frac{2}{2} \\y = - \frac{1}{2} x + 1\\[/tex]

3) So, from our work in the previous step, we can do the same thing we did in step 1 and graph [tex]y = -\frac{1}{2} x + 1[/tex]. Let's mark (0,1) on our graph and use the slope to graph more points and form a line.

4) So, now that we have our graph, we can see that it intersects at (-2,2), therefore that is our solution.

Please don't hesitate to ask any questions!

## Related Questions

What is 300% of 90? Show your work

### Answers

**Answer:**

270

**Step-by-step explanation:**

becasue 100 percent of 90 would be 90

[tex]100*3=300[/tex]

so multiply

[tex]90*3=270[/tex]

Suppose a city with population of 900,000 has been growing at a rate of 3% per year. If this rate continues, find the population of this city in 24 years.

### Answers

**Answer:**

1,548,000

**Step-by-step explanation:**

convert 3% to 0.03 so you can multiply it with 900,000. this gives you what 3% of 900,000 is(27,000). then multiply the 27,000 by the amount of years (24) to get 1,548,000 people.

PLEASE HELP!!!!!!!!!!!!!

### Answers

**Answer:**

is that a test

**Step-by-step explanation:**

in a company, 60% of the workers are men. if 1,390 women work for the company how many workers are there in all?

### Answers

**Answer: 1,600 because it is 60 percent **

**Step-by-step explanation:**

**Answer:**

3,475

**Step-by-step explanation:**

Divide 1,390 by it's percentage when compared to the whole. In this case you divide by 0.4 OR 40% in order to find the total.

i need #14 to be answered if you want you can answer more ❤️

### Answers

**Answer:**

H-40

**Step-by-step explanation:**

**Answer:**

40

**Step-by-step explanation:**

The wholesale price for a shirt is $4.50 a certain department store marks up the wholesale price by 40% find the price of the shirt in the department store round your answer to the nearest cent as necessary

### Answers

Answer:

$6.30

Step-by-step explanation:

From the above question, we are to find the price.

This is calculated as:

Wholesale price + (Whole sale price + %Mark up)

Whole sale price = $4.50

% Mark up = 40%

Therefore:

The price = $4.50 + ($4.50 × 0.4)

= $4.50 + $1.80

= $6.30

The price in the department is $6.30

A store is instructed by corporate headquarters to put a markup of 25% on all items. An item costing $24 is displayed by the store manager at a selling price of $6. As an employee, you notice that this selling price is incorrect. Find the correct selling price. What was the manager's likely error?

### Answers

**Answer:**

hi

**Step-by-step explanation:**

Every year, monarch butterflies migrate approximately 2,500 miles from the Great Lakes to central Mexico where they spend their winters. They travel at a speed of 18 miles per hour. In flight, they flap their wings 500 times per minute. About how many times will a single Monarch butterfly flap its wings in order to make the entire trip from the Great Lakes to central Mexico?

### Answers

**Answer:Dec 18, 2009 — How far do you think you will travel as you migrate from your winter home to ... average stick of gum weighs four times as much as your new monarch body. ... Once you spend a minute or two thinking about life as a butterfly, click on the ... have the farthest journey of all, nearly 4,000 kilometers (2,500 miles).**

**Step-by-step explanation:**

Are these triangles similar? If so why!!

### Answers

Answer: No

Step-by-step explanation:

the x,y one is smaller than the v,w one

Find the length of each missing side and each missing angle in the isosceles triangles below

### Answers

**Answer:**

x = 5

y = 46

z = 88

**Step-by-step explanation:**

x is opposite one of the equal base angles. The other side is marked 5. Therefore x = 5

y is opposite one of the equal sides. It is an angle. It is equal to the other base angle whose measurement is given. y = 46

y + 46 + z = 180 All triangles have 180 degrees. y = 46 (above)

46 + 46 + z = 180

92 + z = 180 Subtract 92

z = 180 - 92

z = 88

Caleb bought groceries and paid $ 1.60 $1.60dollar sign, 1, point, 60 in sales tax. The sales tax rate is 2.5 % 2.5%2, point, 5, percent. What was the price of Caleb's groceries, before tax?

### Answers

**Answer:**

The cost of the groceries is $64 and Caleb paid in total $64.00 not including the sales tax.

**Step-by-step explanation:**

**Answer:**

64$

**Step-by-step explanation:**

A company that produces lawn chairs uses market surveys and linear regression to develop a demand function based on the wholesale price. The demand function is q=-110p+7500. At a price of $45 how many lawn chairs are demanded?

### Answers

**Answer:**

q= 2,550

**Step-by-step explanation:**

Giving the following information:

The demand function is q=-110p+7500.

**When the price is 0, the demand q is 7,500 units:**

p= 0

q= -110*0 + 7,500= 7,500

**Now, when the price is $45, the demand is:**

p= $45

q= -110*45 + 7,500

q= -4,950 + 7,500

q= 2,550

Please help!!!!!! I will mark Brainliest!!!!

### Answers

**Answer:**

its a prediction

there is no correct answer

**Step-by-step explanation:**

but just type $15 i guess

Please help me with math ASAP!!!

### Answers

**Answer:**

x = 12

y = 49

**Step-by-step explanation:**

Find the sum of -7x^2-6x + 9 and 3x2 – 3 + 7.

Please help

### Answers

**Answer:**

16 i think

**Step-by-step explanation:**

An elevator ascends at a rate of 29.6 feet per second. If a building is 1,450 feet tall,

about how long would it take for the elevator to travel from the ground floor to the roof?

### Answers

**Answer:**

49 seconds

**Step-by-step explanation:**

Speed is equal to distance/time, therefore time is equal to distance/speed. Given this, that means 1450ft/29.6ft/s=48.98648649, or about **49 seconds to travel from the ground floor to the roof.**

**Answer:**

49 seconds

**Step-by-step explanation:**

I WILL GIVE BRAINLIEST what comes next butter-

### Answers

**Answer: Eggs? Flower? Cake?**

**Step-by-step explanation:**

**Answer:**

Bread, toast, bagel, crousaint, pasta, etc.

**Step-by-step explanation:**

Thanks for the points.

2х – у = 7

3х + y = 3

### Answers

**Answer:**

x = 2

y = -3

**Step-by-step explanation:**

Solve by substitution:

2x - y = 7

Move the 2x to the other side: -y = 7 - 2x

Divide by -1: y = -7 + 2x

Take the other equation: 3x + y = 3

Substitute y in: 3x + (-7 + 2x) = 3

Take out the parenthesis: 3x - 7 + 2x = 3

Move -7 to the other side: 3x + 2x = 3 + 7

Simplify: 5x = 10

x = 2

Take the first equation: 2x - y = 7

Substitute x back in: 2(2) - y = 7

Simplify: 4 - y = 7

-y = 3

y = -3

**Answer:**

1. x = 1/2y + 3.5

2. x = 1 - 1/3y

**Step-by-step explanation:**

1. add y on both sides then divide 2 by both sides. It will equal x = 1/2y + 3.5

2. subtract y from both sides then divide both sides by 3. You will get x = 1 - 1/3y.

What is the surface area for 4in 10in and 3in

### Answers

Surface area is the sum so 4+10+3= 17

The answer would be 164.0000 Square Units

I need some help please and thenk you

### Answers

**Answer:**

112 ft^3

**Step-by-step explanation:**

l = 8ft w = 6ft h = 7ft

V = [tex]\frac{lwh}{3}[/tex]

8 x 6 x 7= 336

336/3 = 112

**Answer:**

[tex]\boxed{112ft^3}[/tex]

**Step-by-step explanation:**

Given the formula for Volume:

[tex]lw\frac{h}{3}[/tex]

1.) Fill in the formula to solve:

[tex]l=8ft[/tex][tex]w=6ft[/tex][tex]h=7ft[/tex]

2.) Solve [tex](8)(6)\frac{7}{3}[/tex]:

[tex]=112ft^3[/tex]

Which statement is correct?

### Answers

**Answer:**

the third 1

**Step-by-step explanation:**

"The quotient of a number and -6,

increased by 8, is -11."

### Answers

**Answer:**

x=114

**Step-by-step explanation:**

-11=x/-6+8

-19=x/-6

x=114

my answer is wrong but can you help me solve this

### Answers

I’m pretty sure it is 132; because 132 x 0.75 + 33 = 132. Divide it by 132 and you get 1.

Can you guys help me

### Answers

**Answer:**

A

**Step-by-step explanation:**

If you put it in Desmos, you can see that the first one is a linear function.

It moves 5 to the right and move down 2 steps

What are the next three terms in the sequence?

2, -3, -6, 18,...

A. -108, -1,944, -209,952

B. -108, 1,944, -209,952

C. -108,-1,944, 209,952

D. 108, 1,944, 209,952

### Answers

Probably D because it started out as negative and then kept going up to positive

please answer right.

### Answers

**Answer:**

i think the answer was 42.25

**Step-by-step explanation:**

**because first you have to multiply the 35 feet by what comes out and that result, which is 57.75, you challenge by the 100**

i need help pls help

### Answers

**Answer:**

number 5:

3x+1

**Step-by-step explanation:**

What is the equation of this graph in vertex form?

### Answers

(2,-1) is my answer

If 0 degrees Fahrenheit is 32 degrees Celsius, then is 0 degrees Fahrenheit + 0 degrees Fahrenheit = 64 degrees Celsius?

### Answers

**Answer:**

no

**Step-by-step explanation:**

because 0 + 0 farenheit is 0 farenheit

12 days of math challenge

### Answers

**Answer:**

Reindeer and snowflake are 4

tree is 8

snowman is 1

**Step-by-step explanation:**