Mathematics High School

solve this system of equation using substitution, show your work (ANSWER QUICK PLEASE)

Answers

Answer 1

1: 5x and 18y or (5,18)
2: -2x+2y=-4
-2(0)+2y=-4
2y=-4
y=-2

2B)
-2x+2(0)=-4
-2x=-4
x=2

Answer 2

Answer:

One above me is correct 100% :)

Step-by-step explanation:

Related Questions

A frame contains 4 pounds of gold. suppose gold is worth $1,277 per ounce. how much would the gold in the frame be worth?

Answers

Answer:

$81,728

Step-by-step explanation:

For reference: 1 pound = 16 ounces.

Therefore, 4 pounds of gold must be 16 * 4 = 64 ounces.

Since each ounce is $1,277, we must have the total cost of the gold to be $1,277 * 64 = $81,728.

The key word here is "per", which means to multiply.

Answer:Answer:5,108

Step-by-step explanation:

Jasmin rakes at two different houses. it takes her 2 1/3 hours to rake leaves at the first. it takes her 1/2 of that time to rake at the second house. how long does it take jasmin to rake at the second house?

Answers

Answer:

Jasmin rastrilla en dos casas diferentes. le toma 2 1/3 horas rastrillar las hojas al principio. le toma 1/2 de ese tiempo rastrillar en la segunda casa. ¿Cuánto tiempo tarda el jazmín en rastrillar en la segunda casa?

Step-by-step explanation:

A sample of 100 students was randomly selected from a middle school in a large city. These participants were asked to select their favorite type of pizza: pepperoni, cheese, veggie, or Hawaiian. pizza preference and gender were recorded for each participant. The results of the survey are summarized in the table

Answers

The variables of the hypothesis test include the favorite type of pizza and the gender

The null hypothesis is Favorite pizza and gender are independent

How to determine the null hypothesis?

From the complete question, the variables that are measured are:

Favorite type of pizzaGender

The null hypothesis of a test used the equality statement.

So, the null hypothesis would be

Favorite pizza and gender are independent

Answers

Answer:

Step-by-step explanation:

First let us determine the perpendicular line by remembering that a perpendicular line that intersects with the current line must have the opposite reciprocal slope as it. Meaning... the current slope is -1/2 and the opposite reciprocal is +2 or 2.

To clarify...

*opposite= the opposite sign ex. the opposite of +3 is -3 and the opposite of -1 is +1

*reciprocal=put simply, the reciprocal is the flipped version of the current number ex. the reciprocal of 1/2 is 2/1 or 2 and the reciprocal of 3 or 3/1 is 1/3

After we determine the slope of the perpendicular line, we are also know the point it must pass through.

Given that, we can find the equation.

Using y=mx+b

Plug in known varibles

y=-5

x=-4

m=2

b=?

-5=2(-4)+b

b=3

So now that we have b, we can put the equation in standard form.

y=2x+3

Hope this helps!!!

B^2-7b-8 (b=-4) evaluate the expression

Answers

Answer:

Step-by-step explanation:

The ratio of the number of boys to the number of girls in choir is 6 to 7. There are 70 girls in choir. How many boys are in choir?

Answers

Answer:

Step-by-step explanation:

Q. If the word problem is asking you to find the space inside the circle, which formula should you use?
answer choices

Answers

Answer:

The last option: bottom right

Step-by-step explanation:

How to write expressions as the sine, cosine, or tangent of a single angle

Answers

sine(angle) = opposite side / hypotenuse
cosine(angle) = adjacent side / hypotenuse
tangent(angle) = opposite side / adjacent side

Look up trigonometry triangle side names if you need help on that.

I remember this by SOH CAH TOA

y = 4

2x + y = 14
solve using substitution

Answers

So I think it is x= 5 because you have to do 2*5 =10+4= 14. So x equals to 5.

find the missing side of the parallelogram. keep answer in simplest form

Answers

Area of parallelogram is Base×height

10×18=15× x

x= 12

hope it helps

Answer:

x = 12

Step-by-step explanation:

So, area of a parallelogram is base times height.

In this picture, one of the base, height pair is 18 and 10.

18 * 10 = 180

The other base, height pair is 15 and x.

So, 15 and x should equal to 18 * 10.

Then, 15x = 180.

Divide both sides by 15, and you get 15x/15 = x and 180/15 = 12.

So, x = 12

How can you best describe a stop sign using polygons? the sign has sides, so it is . it appears to be because the sides and angles appear to be congruent.

Answers

A polygon is a two-dimensional closed object. The polygon that best describes a stop sign is a regular octagon.

What is a polygon?

A polygon is a two-dimensional closed object with n number of straight sides that is flat or planar and the value of n is always greater than 2 (n>2).

What is an octagon?

An octagon is a polygon that has 8 number of sides.

As we know that a stop sign has 8 sides, therefore, the polygon that is in the shape of the stop sign is an octagon.

An octagon has 8 sides, and as it is mentioned in the problem that sides and angles appear to be congruent, therefore, the polygon must be a regular polygon.

Hence, the polygon that best describes a stop sign is a regular octagon.

Learn more about Polygon:

https://brainly.com/question/17756657

Answer:

8, an octagon, regular

Step-by-step explanation:

on e2020

I need help please with these 2 problems

Answers

Step-by-step explanation:

1a) =>3(3x+1)/4(3x+1)=3/4

b) => 2x(x+5)/(x+5)²=2x/x+5

2) a raph restriction means that the graph stops where the restriction says. But because the y's are the output of the x's, they only give u the x restriction and then you can calculate the point by finding the y coordinate. This may sound weird but here is an example:

[1,3] => this means the graph will only show between the points 1 and 3 (on the x-as). Both points are included in the graph.

[1,3[ => this means the raph will only show between the points 1 and 3 but 1 is still a part of the graph but not 3 so up till every little number but just not 3.

hope u get it lol

Can you pls help me with this

Answers

The score that she needs in her next test to averages 72 is 77
(73+88+64+58+x)/5=72
(283+x)/5=72
283+x=(72x5)
X=360-283
X=77
Check
(73+88+64+58+77)/5=72
(360/5)=72
72=72

Solve for x.
4=8x - 10y

Answers

Answer:

x= 1/2 + 5y/4

Help please I'ma giving alot of points if you say something else just to get the points I will report

Answers

Answer:

Read the explanation

Step-by-step explanation:

look at the photo

ASAPPPPPPPPPPPPP!!!!!!!!

Answers

Answer:

Step-by-step explanation:

supplementary anges are equal to 180 so e is 180-107

Answer: 73∘.

Step-by-step explanation: With supplementary angles, the two angles have to add up to 180∘. According to the question, the measure of <F is 107∘. What we need to do is make <E and <F add up to 180∘. To do this, we can subtract 107∘ from 180∘ to find <E:

180∘ - 107∘ = 73∘, which means that <F is 107∘ and <E is 73∘, which both make 180∘.

Therefore, <E is 73∘.

Have a great day! :)

The equation 2x² + 2y2 – 8x - 12y + 16 = 0 defines a circle.
which of these shows a correct step for determining the center and radius of this circle? choose all that are correct.
(2x2 – 8x + 16) + (2y2 – 12y + 36) = -16 + 36
(x - 4)2 + (y - 9)2 = 5
(x2 - 4x + 4) + (y2 – 6y + 9) = -8 +13
ox? + y2 - 4x - 6y = -16
(x - 2)2 + (y - 3)2 = 5

Answers

Answer:

C, E

Step-by-step explanation:

Here, we want to change the equation of a circle from general form to standard form. This is done by making the leading coefficients 1, completing the squares, and then rewriting the equation in standard form.

The leading coefficients of the given equation are 2, so we first want to divide by 2. This gives ...

x² +y² -4x -6y +8 = 0

Subtracting 8 puts us in better position to complete the squares.

x² +y² -4x -6y = -8

Now, we can add the squares of half the coefficients of the linear terms.

(x² -4x +4) +(y² -6x +9) = -8 +13 . . . . . . matches C

And we can simplify this to the standard form equation:

(x -2)² +(y -3)² = 5 . . . . . matches E

Agustin says that he can hold his breath for 90 seconds. And, he says that he did this 5 times this week. He used fractions and multiplication to calculate how many minutes he held his breath this week.

Answers

Answer:

7.5 minutes

Step-by-step explanation:

90 seconds is equivalent to 1.5 minutes

1.5×5=7.5

Please Help! Will Give Brainlest!

Answers

Answer:

Step-by-step explanation:

amplitude = distance from undisturbed position/centre line to trough or peak

Answer:

Step-by-step explanation:

amplitutde measures the height of the waves.

Round to the ten millions place.

3,025,285,000

o a. 3,025,290,000

o b. 3,020,000,000

c. 3,025,000,000

d. 3,030,000,000

o e. 3,030,285,000

Answers

The answer would be e. 3,030,285,000 because 30 million is closer than 20 million. Hope this helps.

The answer will be D- 3,030,000,000 because e have the 285 thousand

71-2x + 2
y2= -x+8
Albert created this table of solutions for the equations.
X
-2
0
4
N
S
yu
2 | 2
6
10
y2
10
8
6
4
Which point is a solution to the system of equations?
А.
(-2,-2)
B. (0,8
C.
(2,6
Cinem
D. (10,4)
in

Answers

Answer:

(2,6)

Step-by-step explanation:

y1 = y2

2x + 2 = - x + 8

2x + x = 8 - 2

3x = 6

x = 2

y1 = y2 = 6

Rhys's house had a temperature of 12°C. He put the heating on and the temperature rose by 8°C. As he was still co Rhys decided to light a fire which increased the temperature by a further 13°C. What was the temperature in the hou now?

Answers

Answer:

this is very easy.

Step-by-step explanation:

if he started at a temperature of 12, then added 8 and added 13 onto that? the sum of those numbers would be 33. so 33 degrees Celsius

6. On Marika's 8th birthday, in 2004, her father said, "My age is now four times your age."
In what year will Marika's father be able to say, "My age is now three times your age," on
Marika's birthday?

Answers

Answer:

2008

Step-by-step explanation:

when she is 12 (4 years after 2004) her dad will be 36, which is 3 x 12, therefore, in 2008 he will be able to say this.

Answer:

2008

Step-by-step explanation:

The difference in their ages is ...

4m -m = 3m = 3(8) = 24 . . . years (Marika was 8 in 2004)

Marika's age when the father was 3 times her age was ...

3m -m = 2m = 24 . . . years

m = 12 . . . . . Marika was 12 when her father was 3 times her age

That is 12 -8 = 4 years from 2004, so it will be true in 2008.

Buddy ran the same distance each day for 5 days.
Write an expression to model this situation. If
you use a variable, explain what it represents.
b. Evaluate your expression if Buddy ran 10 miles
each day.

Answers

Answer:

One expression you can do is the total amount of distance Buddy runs in a 5 day period, as a function of the amount of miles he runs in a day.

d(x) = y = 5x

d(x) being total amount of miles buddy runs in 5 days. x being the amount of miles he runs in a day.

Now if he ran 10 miles a day, just substitute 10 for x.

d(10) = y = 5(10) = 50

Fill in the table using this function rule

y=5+4x

This is the FORTH time I’ve posted this question PLEASE answer IT

20 POINTSSSSS

Answers

Answer:

-6,-1,4,9,14

Step-by-step explanation:

Just replace x in the equation with parenthsis and inside of them put the x value and solve as normal. From top down the answer is -6, -1, 4, 9, 14

Kristen drank 7 cups of orange juice in the morning and 1/4 of a cup in the afternoon. How much orange juice did Kristen drink in all?

Answers

Kristen drank a total of 7 1/4 cup of orange juice throughout the day.

A cube has a side length of 5 inches. What is the surface area, in square inches of the cube?

Answers

Answer:

A=6a2=6·52=150in²

Step-by-step explanation:

Draw an example of a line RS. Label point T between points R and R. Using point T , draw ray TV.

Answers

The line RS would extend in both direction, while the ray TV would extend in one direction

What are lines?

A line is an undefined term of geometry; and it can only be defined through examples. However, the general notion is that a line extends in both directions without end

What are rays?

Rays are extracts from a line; that have a fixed point and an endless point

Using the above definitions, we can draw the line RS such that the point T is located on line RS and the point T extends to point V to form a ray TV

See attachment for the diagram

Answers

The answer is C ! The total would be $59

Answer:

Her total would be $59 so, we would be a dollar extra.

The answer is Yes, the total will be $59.

Step-by-step explanation:

$58 - $18.50 = You need to earn $39.5.

Garden = $6.50 per hour

Cakes = $5.25 per hour

$6.50 X 3 hours = $19.50

$5.25 X 4 hours = $21

$21 + $19.50 = $40.50 totall

$18.50 + $40.50 = $59

Using digits, what time is represented by quarter to eleven?

Answers

Answer:

10:45

Step-by-step explanation:

Answer:

10:45 :)

Step-by-step explanation:

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