Mathematics High School

Solve for x:
2x + y = -2
4x + y = -8

Answers

Answer 1

Answer:

x = -3

Step-by-step explanation:

2x + y = -2

4x + y = -8

2x + y = - 2

y = -2x - 2

4x + y = - 8

y = -4x - 8

y = -2x - 2

y = -4x - 8

-2x - 2 = -4x - 8

4x - 2x = 2 - 8

2x = -6

2x/2 = -6/2

x = -3

To check just use da graph ;w;

The x is -3

Answer 2

Answer:

Step-by-step explanation:

x= −1 −y/2

x= 4 −8−y/4

Related Questions

Can someone plzz help me with this? To put it on order on the number line??

Answers

Answer:

1/4 1/2 1.5 1 3/4 1.75

Answer:

1/4, 1/2, 1.5, 1 3/4, 1.75

Step-by-step explanation:

1 3/4 and 1.75 is the same tho

solve for w. 7w=-14

please help me with this one plz

Answers

Answer: w = -2

Step-by-step explanation:

7w = -14

Divide both sides by 7

w = -2

That was brief but hope it helps!

Answer:

W = -2

Step-by-step explanation:

7W÷7 -14÷7

W= -2

Convert 0.55555 into a fraction

Answers

Answer:

11111/20000

Step-by-step explanation:

To convert the decimal 0.55555 to a fraction, just follow these steps:

Step 1: Write down the number as a fraction of one:

0.55555 = 0.555551

Step 2: Multiply both top and bottom by 10 for every number after the decimal point:

As we have 5 numbers after the decimal point, we multiply both numerator and denominator by 100000. So,

0.555551 = (0.55555 × 100000)(1 × 100000) = 55555100000.

Step 3: Simplify (or reduce) the above fraction by dividing both numerator and denominator by the GCD (Greatest Common Divisor) between them. In this case, GCD(55555,100000) = 5. So,

(55555÷5)(100000÷5) = 1111120000 when reduced to the simplest form.

The value of the fraction is A = ( 11111 / 20000 )

What is a Fraction?

An element of a whole is a fraction. The number is represented mathematically as a quotient, where the numerator and denominator are split. Both are integers in a simple fraction. A fraction appears in the numerator or denominator of a complex fraction. The numerator of a proper fraction is less than the denominator.

Given data ,

Let the fraction be represented as A

Now , the value of A is

Let the decimal number be represented as D

Now , the value of D = 0.55555

Multiply the number D by 100000 on both the numerator and denominator

And , the fraction is A = D x 100000 / 100000

A = 55555/100000

Divide by 5 on both the numerator and the denominator , we get

A = ( 11111 / 20000 )

Hence , the fraction is A = ( 11111 / 20000 )

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When graphed, which set of data would represent a negative
relationship?

Answers

Answer:

it's A because as the temperature rises less people wear gloves

someone please help 5 points!!

Answers

Answer:

7.1 is the answer of this question

A rectangular prism has a length of iom, a height of 2m, and a width of 5m. What is
its volume, in cubic m?

Answers

Answer: Would it be 10^3m

Step-by-step explanation:

Volume of a rectangular prism = (length x width x height) cubic units.

4. Find and compare the intercepts of the
functions.
Function A
Function B
4y + x = 12

Answers

Answer:

Function A intercept: 4

Function B intercept: 3

Step-by-step explanation:

Sally was painting an airplane on a canvas using a 1in.: 8ft scale. If her painting was 29 inches wide, what was the actual width of the airplane?

Answers

Answer:

232 inches or 19.33 feet

Step-by-step explanation:

232 feet is the actual width of the airplane.

What is Unit of Measurement?

A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity.

Sally was painting an airplane on a canvas using a 1in.: 8ft scale

1 inches = 8 ft scale.

Sally painting was 29 inches wide.

We have to find the actual width of the airplane.

Convert 29 inches to feet.

As we know 1 inche is 8 feet so 8 inches will be the multiple of 8 and 28.

29×8

232 feet.

Hence, 232 feet is the actual width of the airplane.

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I NEED HELP ASAP PLEASE

Answers

ok b makes more sense

Step-by-step explanation:

The line models the temperature starting at noon on an autumn day.

a. Find the y-intercept of the function.

b. What does the y-intercept represent?

please help! (i will insert a picture so you can see the graph)

Answers

Answer:

a) y-intercept (as can be seen) is 50 degrees

b) this means that, at the time the temperature began to be recorded, it was 50 degrees outside

Step-by-step explanation:

4(x)squared+3x+3=6(x)squared-4x=6 find x

Answers

Answer:

I think if yo seperate 4 from x then seperate 3 from x add those together and you get 18.

Step-by-step explanation:

It sounds right.

Samir spent $150 at Costco. He had a coupon that took 5% off the total bill, b. What was the bill before the discount?

Answers

Answer:

157.89 is the answer

a first number plus twice a second number is 4. twice the first number plus the second number totals 26. find the numbers

Answers

Answer:

a = 16

b = -6

Step-by-step explanation:

a + 2b = 4

2a + b = 26

2a + 4b = 8

2a + b = 26

3b = -18

b = -6

a + 2(-6) = 4

a - 12 = 4

a = 16

Select the procedure that can be used to show the converse of the
Pythagorean theorem using side lengths chosen from 5 cm, 9 cm, 12 cm, and
13 cm.
A. Knowing that 52 + 92 < 122, draw the 5 cm side and the 9 cm side
with a right angle between them. The 12 cm side will fit to form a
right triangle.
B. Knowing that 52 + 122 = 132, draw any two of the sides with a right
angle between them. The third side will fit to form a right triangle.
C. Knowing that 52 + 122 = 132, draw the 5 cm side and the 12 cm
side with a right angle between them. The 13 cm side will fit to
form a right triangle.
D. Knowing that 92 + 122 # 132, draw the 9 cm side and the 12 cm
side with a right angle between them. The 13 cm side will fit to
form a right triangle.

Answers

To show the converse of the Pythagorean theorem using side lengths chosen from 5 cm, 9 cm, 12 cm, and 13 cm the procedure that can be used is : C. Knowing that 52 + 122 = 132, draw the 5 cm side and the 12 cm side with a right angle between them. The 13 cm side will fit to

form a right triangle.

In Option C, we are given the lengths 5 cm, 9 cm, 12 cm, and 13 cm. The converse of the Pythagorean theorem states that if the square of the longest side of a triangle is equal to the sum of the squares of the other two sides, then the triangle is a right triangle.

In this case, we have 52 + 122 = 132, which satisfies the condition for a right triangle according to the Pythagorean theorem.

By drawing the 5 cm side and the 12 cm side with a right angle between them, we can see that the 13 cm side will fit perfectly to form a right triangle. This demonstrates the converse of the Pythagorean theorem.

Option C is the correct procedure to show the converse of the Pythagorean theorem using the given side lengths.

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i need help im failing

Answers

Answer:

D because 0.75 in fraction form is 3/4 and 3/4 is greater then 2/3 which is the graphs rate of change.

Step-by-step explanation:

.
What is (4x2-9X+1) -(5x2-x-7) written in standard form?

Answers

Answer:

(9-9x) - (3-x)

Step-by-step explanation:

(4x2 -9x +1) - (5x2 -x -7)

4x2+1= 9. 5x2-7= 3

(9-9x) - ( 3-x)

Johns business made $4500 in January and $8600 in March. What is the rate of change in his profit for this period?

Answers

Answer:

The rate of change will be positive because in march the profit has increased as compared to january.

Step-by-step explanation:

how do i find an equation for a line with an x-intercept of 4 and a y-intercept of -2

Answers

Answer:

The equation of a line is y = ax + b, where a is the slope and b is the y-intercept.

Since we have the y-intercept, all we need to do is find the slope. To find the slope, you need 2 coordinates.

The y-intercept is where the line crosses the y axis, so it is where x is 0. Since the y intercept is -2, that means the first coordinate is (0, -2)

The x-intercept is where the line crosses the x axis, so it is where y is 0. Since the x intercept is 4, that means the second coordinate is (4, 0)

Since we already have the y-intercept, all we do is put the slope in the equation: y = 1/2x - 2.

Step-by-step explanation:

(3x+15) (2x)

Help pls

Answers

Answer:

(

)

(

)

(3x+15)(2x)

Simplify

Distribute

(

)

(

)

(

)

(

)

Solution

(

)

(

)

Step-by-step explanation:

Answer:

[tex]3x+15+2x=180\\5x=165\\x=33\\[/tex]

what are the coordinates of the point ? SHOW STEP BY STEP

Answers

Answer:

(3, 0)

Step-by-step explanation:

Use the formula:

[tex]\frac{a}{a+b}[/tex](x2 - x1) + x1, [tex]\frac{a}{a+b}[/tex](y2 - y1) + y1

a and b are the numbers in the ratio: a:b

Substitute everything into the equation.

2/2+1(6 - -3) + (-3)

2/2+1(1 - -2) + (-2)

Now combine like terms.

2/3(9) -3

2/3(3) -2

Solve.

6 - 3

2 - 2

(3, 0)

I hope this helps!

Matteo is following this recipe to make a cake.
He wants to make three of these cakes.
How much of each ingredient does he need?

Recipe: Makes 1 cake
8 ounces butter
7 ounces sugar
10 ounces of flour
4 eggs
1 teaspoon (tsp) baking powder

Answers

Answer:

30 ounces of butter

25 ounces of sugar

35 ounces of flour

15 eggs

10 tbps of baking powder

Step-by-step explanation:

All you do is multiple each quantity by 5 I think

we are learning about this in school but check the web to see if it is correct

PLS PLS PLS HELP MEEEEEEEEEEEEEE

Answers

Answer:

Choice B: Carbon would not be recycled and added to soil, interrupting the cycle.

Step-by-step explanation:

Without the help of decomposers, the ones who break the dead organisms down, the carbon would be locked inside the dead organism. Then carbon wouldn't be able to get recycled through the air. The only way it could be released would be through combustion.

At the start of the experiment substance is measured to be 90°C, and by the end of the experiment its temperature is measured as -50°C. How does the temperature change from the start to the end of the experiment? Represent a decrease in temperature with a negative number.

Answers

Answer:

-140C

Step-by-step explanation:

∆T = T2-T1

∆T = -50-90= -140C

Simplify the expression:
k–3k+5k

Answers

Answer:

Step-by-step explanation:

k-3k = -2k

-2k+5k = 3k

..........

Can someone help me do this it’s an emergency

Answers

That is so hard i was so confused

Please help me!!!!!!!!

Answers

Answer:

Step-by-step explanation:

n + 10 = 8 + 4

find the value of n.

Answers

Answer:

n=2

Step-by-step explanation:

8+4=12

12-10=n

n=2

N is equal to 2. 8+4 is 12 which leaves you with n+10=12 so then you subtract 10 from 12 which gives you n=2

one sixth multiplied by 42

Answers

Answer:

6/42 = 1/7

Step-by-step explanation:

1/6 x 42/1

1 x 42 = 42

6 x 1 = 6

simplify to 1/7 (6 divided by 6 = 1, 42 divided by 6= 7)

hope this helps :)

Answer:

Step-by-step explanation:

1/6 x 42 = 7

Help please help desperate due today..

Answers

Answer:

54 Students on each bus

Step-by-step explanation:

I got that answer by subtracting 16 to 232 which got me 216 then i divide 4 and got 54!

Hope this Helps! :)

Answer:

Step-by-step explanation:

First you do 232-16 which is 216 then all you do is divided 216 by 4 which is 54!

I hope this helps and have a great day!

Kristina walked 1 2/3
miles on Sunday and 2 3/4 miles on Monday. What was the total distance, in
miles, that she walked over those two days

Answers

4 5/12 you just add the fractions

Answer: 4 5/12 miles

Step-by-step explanation: To add or subtract two fraction, you need to find a common denominator. The easiest way to do that is to just multiply the denominators of the two fractions together. 3 x 4 = 12 so I'll use 12 as my common denominator. Now that we have that, we have to convert the numerators. We must multiply the numerators by the same number we multiplied or denominators by to get the common denominator. 3 x 4 = 12, 4 x 3 = 12, 2 x 4 = 8, 3 x 4 = 12. Now the fractions we have are 9/12 and 8/12. Since they have the same denominator now we can add them. 9/12 plus 8/12 equals 17/12 or 1 and 5/12 written as a mixed number. We also add the whole numbers. 1 plus two equals 3. 3 plus 1 and 5/12 equals 4 and 5/12.

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Solve for x: 2x + y = -2 4x + y = -8

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Solve for x:
2x + y = -2
4x + y = -8