Mathematics High School

Solve each system by substitution.
y=-4x-9 y=3x+19

Answers

Answer 1

Answer:

x=-4, y=7

Step-by-step explanation:

According to the first equation, y = -4x - 9, so we can substitute y in the second equation for -4x - 9.

y = 3x + 19

-4x - 9 = 3x + 19

Add 9 to both sides

-4x = 3x + 28

Subtract 3x

-7x = 28

Divide by -7

x = -4

Plugging this into the equation, we have:

y = -4x - 9

y = -4(-4) - 9

y = 16 - 9

y = 7

Related Questions

solve this please

log(4x+16)=2

Answers

Answer:

X = -3.5

Step-by-step explanation:

Answer:

-7/2

Step-by-step explanation:

4x+16=2

  -16      -16

4x= 2-16

4x=-14

/4    /4

x= -7/2

over which of the following approximate intervals is the water level decreasing
pls help !

Answers

Answer:

B and C

Step-by-step explanation:

It is going down

Find the unknown side of the triangle below.
9 in
18.8 in
15 in
8 in

Answers

It’s 9
If you do a^2+b^2=c^2 which basically means 8+x=17, x would add up with 8 to 17. So that’s why it’s 9 :)

Answer:

its actually 15 inches, cause if you bring the bottom line up and compare it to the 17 line its a smidge shorter so go with the largests number the less then 17. theres proof for the quiz itself

Step-by-step explanation:

Solve the following proportion for x.

X/13 = 17/7

Round your answer to the nearest tenth.

Answers

Answer:

31.6

Step-by-step explanation:

x / 13 = 17 / 7

7x = 221

x = 221 / 7

x = ~31.6

Please answer the correctly in the picture below 8TH GRADE MATHENMATICS?!

Answers

Answer:

B 3.5

Step-by-step explanation:

Hope it Helps!

3.5

Hope it helps my freind

Answer fast!!!!!!!!!

Answers

Answer:

$0.52 = 0.52

Step-by-step explanation:

I think so.....

The ratio of men to women working for a company is 5 to 6. If there are 198 employees total, how many women work for the company?

Answers

Answer: 110 Women !

Step-by-step explanation:

Call their numbers 4x to 5x.

Since there are a total of 198 people,

4x + 5x = 198

9x = 198

x = 22

so that there are

88 men and 110 women.

Please help me mark u brainliest anything please i beg u : and i am lady
in the interval 0 x 360 find the values of x for which tan x =-0.6745

Answers

Answer:

180

Step-by-step explanation:

Similar polygons have corresponding sides that are proportional and corresponding angles that are -
A congruent
B parallel
C similar
D proportional​

Answers

A. congruent

hope this helped <33

Katie answered 2/3 of a 15 problem math correctly. How many questions did Katie answer incorrectly?

Answers

2/3 of 15 is 10:)
so i believe she got 5 incorrect

What will be true about the sixth term in the pattern below?


1, 2, 4, 8, ...


It will be an even number greater than 16.


It will be an even number greater than 32.


It will be an odd number greater than 16.


It will be an odd number greater than 32.

Answers

it will be an even number greater than 16

Write equation of a line parallel or to a y=2x+3 that passes the ordered pair (3,6)

Answers

Answer:

y = 2x

Explanation:

To write the equation of a line u use the formula y = mx + b, where

y = y coordinate

m = slope

x = x coordinate

b = y intercept

One thing about parallel lines is that they always have the same slope. If you want to find a line parallel to y = 2x + 3, then the parallel line will also have a slope of 2.

So far, then, the equation would look like this: y = 2x + b

To find the y-intercept, we substitute in the values from (3,6) into the equation because the line passes through that point. So:

y = 2x + b

(6) = 2(3) + b

6 = 6 + b

6 - 6 = b

b = 0

Since the y-intercept is 0 (so the line passes through the origin), it doesn't need to be written on to the end of the equation.

y = 2x + 0 is just

y = 2x

That's your final equation! hope this helps!

A retailer marks up the price of a coffee mug from $6.25 to $8.77. By what percent did the price increase? Round to
two decimal places
a. 28.73%
b. 39.68%
40.32%
45.97%
C
d

Answers

Answer:

c

Step-by-step explanation:

edg 20/21

If a store raises a coffee mug's price from $6.25 to $8.77. The price increase was 40.32%. Option C is correct.

What is the percentage?

It's the ratio of two integers stated as a fraction of a hundred parts. It is a metric for comparing two sets of data, and it is expressed as a percentage using the percent symbol.

The usage of percentages is widespread and diverse. For instance, numerous data in the media, bank interest rates, retail discounts, and inflation rates are all reported as percentages. For comprehending the financial elements of daily life, percentages are crucial.

It is given that, A retailer marks up the price of a coffee mug from $6.25 to $8.77.

We have to find the percentage by which the price increase,

% increment = New rate - old rate / old rate × 100

% increment =(8.77 - 6.25)× 100

% increment =40.32%

Thus, if a store raises a coffee mug's price from $6.25 to $8.77. The price increase was 40.32%. Option C is correct.

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Answer fast!!!!!!!!!!!!!!

Answers

this is the answer 0.7
decimal form is 0.7, hope this helps

The winning time for a race are shown in the table.

Which answer describes the average rate of change from year 2 to year 4?

A) the winning time increased by an average of 0.4 second per year from year 2 to year 4.

B) the winning increased by an average of 0.8 second per year from year 2 to year 4.

C) the winning time increased by an average of 0.475 second per year from year 2 to year 4.

D) the winning time increased by an average of 0.267 second per year from year 2 to year 4.

Answers

Answer:

The winning time increased by an average of 0.4 second per year from year 2 to year 4.

Step-by-step explanation:

I just took the quiz

The winning time for a race displayed in the table would be:

A). The winning time increased by an average of 0.4 seconds per year from year 2 to year 4.

Find the increase in winning time:

Given that,

Year                             Winning Time(seconds)

1                                          27.5

2                                         28.4

3                                         28.7

4                                         29.2

5                                         29.44

The total change in the time = (0. + 0.3 + 0.5 + 0.24)/4

= 0.485 seconds

If we round off, it becomes 0.5 seconds.

Therefore, it can be considered that an average of 0.5 seconds changes every year from year 2 to 4.

Thus, option A is the correct answer.

Learn more about "Time" here:

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Jason needs to run 30 laps before basketball practice. His coach makes a deal with the team that on Friday’s they only need to complete 5/6 of that.



Write an expression or equation to represent the number of laps to complete on Friday.

Answers

Answer:

a little bit less than 30

Step-by-step explanation:

someone please show me the steps on how to solve this.

Answers

Answer:

1. BC=26

Step-by-step explanation:

1• because it is an equiangular triangle (i guess that would be low I describe it), all of the sides & angles are =.

I’m not 100%sure on number two but i hope this helps fir number one

at a basketball game, 18% were supporting the visiting team. if 2624 people attending supported the home team, what was the total number of people attending the game?

Answers

Answer:

2624= 82%

18%= 2624/82=32. 32*18=576

Step-by-step explanation:

If 2624 people attending supported the home team, the total number

of people attending the game will be 3200.

What is the percentage?

It's the ratio of two integers stated as a fraction of a hundred parts. It is a metric for comparing two sets of data, and it is expressed as a percentage using the percent symbol.

The usage of percentages is widespread and diverse. For instance, numerous data in the media, bank interest rates, retail discounts, and inflation rates are all reported as percentages. For comprehending the financial elements of daily life, percentages are crucial.

It is given that 18% were supporting the visiting team and 2624 people attending supported the home team as a result 82 % were supporting the home team,

Let the total number of people attending the game be x.

⇒82% of x = 2624

⇒(82/100)×x= 2624

⇒x= (2624×100)÷82

⇒x=3200

Hence, if 2624 people attending supported the home team, the total number of people attending the game will be 3200.

Learn more about the percentage here:

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What is the density of an object with a mass of 30g and a volume of 10mL

Answers

Answer:

3 grams/cubic centimeter

Step-by-step explanation:

Density formula is mass divided by volume

30/10=3

3 grams/cubic centimeter

HIIIOO can someone please help me! I miss class and I don’t know what we learned about❤️

Answers

Answer:

The answer is C

Step-by-step explanation:

I got this by these steps:

1. Since you have the transversal FH you know that H is going to equal 180

2. So all you do know is subtract 180-82

3. You get 98

4. M<FHJ is 98

Hope that helps

Answer:

=28

Step-by-step explanation:

since its made of two triangles, you can calculate one of the triangles and multiply by two

the degrees of a triangle is 180 degrees

70+82= 152

180-152= 28

can i get brainiest plsss

60 people were asked the colour of their car and the pictogram shows the results.

a) 16 cars are red. Complete the key.

b) How many cars are silver?

KEY: One circle represents __ cars

Red = 4 circles
White = 3 circles and a half
Silver = 5 circles and 3/4
Grey ​= 1 circle and 3/4

Answers

The number of silver cars in the pictogram is 23.

How many cars are silver?

If 16 cars are red, then, each circle represents 4 cars.

If each circle represents 4 cars, then, each quarter of a circle represents 1 car

White car = 4 + 4 + 4 + 2

= 14 cars

Silver = 4 + 4 + 4 + 4 + 4 + 3

= 23 cars

Grey = 4 + 3

= 7 cars

Total cars = red + white + silver + grey

= 16 + 14 + 23 + 7

= 60 cars

It can therefore be concluded that silver cars is 23 in number.

Read more on pictogram:

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Help!! will give brainiest! please no joke answers this is due by midnight

Answers

1. (1,3)
2.6,9,15 (top row)
1,2,4 (bottom row)
3. (1,3), (2,6), (3,9), (4,12),(5,15)
4. Edeena walks 6 miles in 2 hours.
hope this helps
1 -
(1,3)

2 -
Top of chart - 3,6,9,12,15
Bottom of chart - 1,2,3,4,5

3 -
(1,3) (2,6) (3,9) (4,12) (5,15)

4 -
(The picture)

5 - Sadly not sure about this one

The ratio of a:b is 3:4.
the ratio of b:c is 5:3.
work out the ratio of a:c

Answers

I think the best way to solve this is to convert the ratios into fractions and then subtract from there :)

find the area of an equilateral triangle of side 12 cm​

Answers

Step-by-step explanation:

root 3 by 4a²

root3/4*(12)²

36root3

Answer:

A≈62.35cm²

Step-by-step explanation:

A=3

4a2=3

4·122≈62.35383cm²

A rectangular football field is 6x meters long and 3x meters wide. If its
perimeter is 360 meters, then the value of x is
​

Answers

Answer:dgrgfhtbsdvdsvs

Step-by-step explanation:dssfdfd

Answer:

x = 20

Step-by-step explanation:

perimeter = 2(width) + 2(length)

2(6x) + 2(3x) = 360

12x + 6x = 360

18x = 360

divide both sides by 18

x = 20

12:53:34
What is most often given a value of zero to describe an object’s position on a straight line?

displacement
reference point
distance
ending location

Answers

Answer:

Reference Point

Step-by-step explanation:

The answer is reference point. This is because reference point is used to determine if an object is in motion or if it has changed is direction.

Thus, reference point has to be a value of zero for us to use it to determine if an object has moved.

ILL GIVE BRAINLIEST FOR FIRST ANSWER!
Divide.

12÷18

Answers

Answer:

0

Step-by-step explanation:

A 381 foot cable runs from the top of a radio tower to a skate in the ground. If it hits the ground 167 feet from the base of the tower , what is the angle of elevation that is makes with the ground?

Answers

Answer:

64°

Step-by-step explanation:

Using Pythagoras rule :

Cosθ = adjacent / hypotenus

Adjacent = 167

Hypotenus = 381

Cosθ = 167 / 381

Cosθ = 0.4383202

θ = Cos^-1(0.4383202)

= 64.003

Hence, angle of elevation = 64°

Determine whether the graph shows a positive correlation, a negative correlation, or no correlation. If there is a positive or negative correlation, describe its meaning in the situation. Domestic Traveler Spending in the U.S., 1987-1999 Spending (dollars in billions) A graph titled Domestic Traveler Spending in the U S from 1987 to 1999 has year on the x-axis, and spending (dollars in billions) on the y-axis, from 225 to 450 in increments of 25. Year Source: The World Almanac, 2003

Answers

Answer:

A

Step-by-step explanation:

ifunny is dankreloaded

The solution is, Option B Negative ,as time passes, speed decreases.

What is Correlation?

Positive Correlation= With Increase in x value, y value also increases or vice versa, we call it positive correlation.

Negative Correlation= With Increase in x value, if y value decreases or vice versa, we call it negative correlation.

here, we have,

Description of the Graph

1. The Relation between , Speed and time is depicted on the graph.

2. Minute = x coordinate

Miles per hour= y coordinate

The points shown on the graph , describing the relationship are, (5,15),(10,13.8),(15,11),(20,10),(25,9.8).

There are two types of Correlation

Positive Correlation= With Increase in x value, y value also increases or vice versa, we call it positive correlation.

Negative Correlation= With Increase in x value, if y value decreases or vice versa, we call it negative correlation.

As you can see from the points plotted on the graph ,with increase in x value , y value decreases.

So it is negative correlation.

As, time passes, Speed Decreases, So it is a Negative Correlation.

Option B  Negative ,as time passes, speed decreases.

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what is 8.154 to 1 decimal place?
​

Answers

What is 8.154 rounded to 2 decimal places?" is the same as asking, "What is 8.154 rounded to two decimal points?" or "How to round 8.154 to two decimal places."

The main point is that you want to round 8.154 to two digits or places after the decimal point. Thus, we want to eliminate the last digit in 8.154. To eliminate the last digit in 8.154, we use the following Two Decimal Places Rules to get the answer:

Two Decimal Places Rule #1: If the last digit in 8.154 is less than 5, then remove the last digit.

Two Decimal Places Rule #2: If the last digit in 8.154 is 5 or more and the second to the last digit in 8.154 is less than 9, then remove the last digit and add 1 to the second to the last digit.
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