How do you solve equations using Substitution.

Answers

Answer 1
Substitution is one of the methods for solving linear equations. It is a good choice if there is a variable with a coefficient of 1. This method involves solving one of the equations for a variable and then substituting that expression into another equation to solve for another variable. This will produce a single equation with one variable, which can then be solved algebraically.

Related Questions

The diameter of a baseball is approximately 3 inches. What is its volume?
Round your answer to the nearest whole number.

A. 9 in^3
B. 13 in^3
C. 113 in^3
D. 14 in^3

Answers

Answer:qe

Step-by-step explanation:

The volume of the baseball is 14 in³.

The volume of a sphere can be calculated using the formula:

V = (4/3)πr³

where V is the volume and r is the radius of the sphere.

We have,

Diameter = 3 inch

radius = diameter / 2 = 3 / 2 = 1.5 inches

Substituting the radius into the volume formula:

V = (4/3) π (1.5)³

V ≈ (4/3) x 3.14 x (1.5)³

V ≈ 14.13 in³

Thus, the volume of the baseball is 14 in³.

Learn more about Volume here:

https://brainly.com/question/21623450

#SPJ6

Which expression is equivalent to 4 x 4 x 4 x 5 x 5 ?

Answers

Answer:

4³×5² or 4³5²

Step-by-step explanation:

This is because there are three consecutive 4s, so you have to put the 4 into exponential form 3 times. So the exponential form for the 4s will be 4³. There are also 2 consecutive 5s so you have to include 2 in the exponential form. So, the exponential form of the 5s is 5². Now you have to somehow multiply them together. You could do this by putting a multiplication sign, (4³×5²) or you could bunch them together and it will mean the same thing (4³5²).

Hope this helps :)

Matthew is making bags of trail mix for hiking club. He will use 21 ounces of walnuts, 10.1 ounces of almonds, and 28.4 ounces of cashews. This amount makes 25 bags of trail mix. How many ounces are in each bag?

Answers

Answer:

its 2.38 ounces in each bag

Step-by-step explanation:

u add all of he numbers then divide by 25. your welcome

Find the percent of change. Round to the nearest tenth, if necessary.

In the 2006 season, Tom Brady threw for 3,529 yards. In the 2007 season, he threw for 2,806 yards.

Answers

Answer:

20.487%

Step-by-step explanation:

divide the second number by the first. then do one minus that number

find x of the triangle

Answers

Answer:

The angle is 90 degrees

Step-by-step explanation:

Is that what ur asking?

Answer: 15.199

Step-by-step explanation:

Using the Pythagorean theorem, we know that a²+b²=c²

In this case, we know that c is 16, and that b is 5.

We can rearrange the equation so that it becomes a²=c²-b²

a²=16²-5²

a²=256-25

a²=231

√a²=√231

a=15.199

1. A piece of wire that is 28 inches long is cut into two pieces, each of which is then bent into the shape of a
square. The larger square has side lengths that are three inches longer than the smaller square.
(a) If x is the side length of the smaller square and y is the side length of the larger square, write a system of
equations that models this scenario.
(b) Solve the system of equations and determine the lengths of the two pieces of wire.

Answers

Answer:

1: So one side is 5

2: Other side is 2

Step-by-step explanation:

1)

4(x+3)+4x=28

Solve

4x+12+4x=28

Combine

8x+12=28

Isolate

8x=16

Isolate

x=2

Substitute

4(2+3)=20

4*2=8

Now find each side

20/4=5

8/4=2

Kala purchased a prepaid phone card for $25. Long distance calls cost 8 cents a minute using this card. Kala used her card only once to make a long distance call. If the remaining credit on her card is $21.48, how many minutes did her call last?

Answers

Answer:

44 minutes

Step-by-step explanation:

25.00-21.48=3.52

this means she used $3.52

which is 352 cents.

Each minute is 8 cents so 352/8 = 44

2x^4=9x^2 solve by factoring

Answers

Step-by-step explanation:

2x⁴ = 9x²

2x⁴ - 9x² = 0

x²(2x² - 9) = 0

Either x² = 0 or 2x² - 9 = 0.

When x² = 0, x = 0.

When 2x² - 9 = 0, x² = 9/2, x = ± 3/√2.

Hence the solutions are

x = 0, x = 3/√2 and x = -3/√2.

What is 1.8(x-4.2)+x simplified, I do not need to know what is x is, I just wanted to know what the equation is simplified

Answers

Answer:

2.8x - 7.56

Step-by-step explanation:

Please let me know if you want me to add an explanation as to why this is the answer. I can definitely do that, I just wouldn’t want to write it if you don’t want me to :)

write the linear equation in slope intercept form.

4x+y=1​

Answers

Answer: y=-4x+1

Step-by-step explanation:

The slope-intercept form of a line is y=mx+b. Therefore, y needs to be on one side of the equation, and the x term and constant need to be on the other. Rearrange the equation to make this true:

4x+y=1

(4x+y)-4x=1-4x

y=1-4x

y=-4x+1

3 Triangles ABC and DEF shown in the diagram
are similar.
In triangle ABC, mZA = 64°.
In triangle DEF, m_F= 73º.
What is the measure of ZG?
Answer: mZG=

Answers

Answer:

137

Step-by-step explanation:

A (1,4) B (-2,3) C (-4,5) 3 units right 4 units down

Answers

Step-by-step explanation:

can you send a picture so we can see at least?

If dm=12 find dc and cm

Answers

Im not sure sorry, i hope somebody can help and have a nice day.

If 12 out of 52 cards in the deck our face cards. What percentage of cards in the deck or face cards?

Answers

The percentage would be 23% because you have to do 12/52 and get .2307 and round that to 23%

Trigonometry
Pls help

Answers

I hate trigonometry sry bro

Circle A has center of (6, 7) and a radius of 4, and circle B has a center of (2, 4) and a radius of 16. What steps will help show that circle A is similar to circle B?

Translate circle A using the rule (x + 4, y + 3).
Rotate circle A 45° about the center.
Dilate circle A by a scale factor of 4.
Reflect circle A about the origin.

Answers

Answer:

c took quiz

Step-by-step explanation:

Circle A can be made similar to circle B by dilating circle A by scale factor 4.

Circles can be made similar by performing transformations such as dilations, translation, etc.

The given parameters are:

Circle A

[tex](x,y) = (6,7)[/tex] --- center

[tex]r=4[/tex] --- radius

Circle B

[tex](x,y) = (2,4)[/tex]  --- center

[tex]r = 16[/tex] --- radius

To do this, we simply make both circles have the same radius.

Given that:

[tex]r_A=4[/tex] --- radius of A

[tex]r_B = 16[/tex] --- radius of B

Dilating the radius of A by 4 will make both circles have the same radius.

i.e.

[tex]R = r_A * 4[/tex]

[tex]R = 4 * 4[/tex]

[tex]R = 16[/tex]

Now, the new radius of A is 16; same as B

Both circles now have the same radius, means that the circles are similar.

Read more at similar shapes at:

https://brainly.com/question/2859427

GIVING AWAY BRAINLY!!

choose the linear expression 4(10x - 4).

Answer Choices:

A.) 10x - 16
B.) 40x - 16
C.) 40x + 16
D.) 40x - 4​

Answers

The answer is B.) 40x-16

i just need confirmation that i’m doing this right

Answers

*plz explain cuz I can’t see the picture*

help plss?? :) What is the correct definition of the term “urbanization?”

the development of a district immediately outside the city

the connection of many urban areas

the growth and expansion of cities

a movement of people from the city to the country

Answers

Answer:

the first one

........................

Answer:

it's the first one my g

Step-by-step explanation:

fghbghhgttyhjdjusheishsushsh

Area of circles, please help me it's so that I can pass this year. Solve it

Answers

Answer:

78.54 cm2

Step-by-step explanation:

A = pi ·  r squared

A = 78.54 cm2

PLZZZZZZZZZZZ HELP
In a recent year, 42% of all college students were enrolled part-time. If 8.9 million college students were enrolled part-time that year, what was the total number of college students?
Round your answer to the nearest million.

Answers

Answer:

A.what was the total number of college students?

B.42%,8.9

C.multiplacation

D. 0.42x8.9=N

E. 0.42×8.9=3,738,000

F.Round your answer to the nearest million.

4,000,000

G. 4,000,000 Is the total number of collage student

I'm just A Beginner。◕‿◕。

Answer:

21 million college students

Given: A= (0, 0), (2, 1). (3, 1.5). (4, 2). .}ls A a function and why?

Answers

Answer:

Yes, it is a function

Step-by-step explanation:

the definition of a function is "a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output." Our input is represented by x, or the first number in the parentheses, and our output is y, or the second number in the parentheses. Because each x value had exactly one output, or y, it is a function

Solving an Absolute Value Equation
What is the solution set of -+-=-122
O no solution
8-12
(12)
[-12 12

Answers

Answer:

{-12,12}

Step-by-step explanation:

it looks like that I guess

A printer will produce 80 wedding invitations for $210. The price to produce 120 invitations is $290. The printer uses a linear function to determine the price for producing different amounts of invitations. How much will the printer charge to produce 60 invitations?
A. $120.00
B. $145.00
C. $157.50
D. $170.00

Answers

The answer is D)170.00

PLZZZ HELPPPP
Liang bought a basket of apples to make pies for her friends. The basket of apples weighed ppp pounds. Before she had time to make the pies, she ate 3 pounds of apples. There are 17 pounds of apples left to make pies.
Write an equation to describe this situation.
What was the total weight of the basket of apples?

Answers

Answer:

Equation: p - 3 = 17

Weight of basket of apples = 20 pounds

Step-by-step explanation:

Given that:

Weight of basket of apples = p

Weight of apples eaten by Liang = 3 pounds

Weight of left apples = 17 pounds

According to given statement.

p - 3 = 17

Adding 3 on both sides

p - 3 + 3 = 17 + 3

p = 20 pounds

Hence,

Equation: p - 3 = 17

Weight of basket of apples = 20 pounds

Marlowe loves to draw. She wants to refine her skills and start taking drawing lessons at a local art studio. The table shows the cost of drawing lessons.

Answers

Sorry im a little late but here's how i did it.

Hope this helps! :)

Can you guys please solve this problem.

Answers

Answer:

x=4

Step-by-step explanation:

5 + 9 = 6x - 10

14 = 6x - 10

6x = 24

x = 4

Answer:

[tex]6x - 10 = 5 + 9 \\ 6x - 10 = 14 \\ 6x = 14 + 10 \\ x= \frac{24}{6} \\ x = 4[/tex]

If I get paid 10 dollars a hour, how much do I get paid every 1 minute.

Answers

Answer:

0.16666

Step-by-step explanation:

100/60

Is this right?
1. Given a right triangle ABC, find the following trigonometric ratios with sides AB = 6, BC = 8 and AC = 10 units. Hint: draw and label your triangle.
a) sin A = 0.13
b) cos A = 0.99
c) tan A = 0.02
d) sin C = 0.01
e) cos C = 0.99

2. Looking back at question 1,
a) which vertex has the right angle? How do you know? B has a vertex. I know this because angle A and and C connect to angle B, and angle B it the corner of a right angle.
b) what do you notice about sine and cosine of complementary angles? The sine of A is different from the sine of C, and the Cosine of A is the same as the cosine of C

Answers

Answer:

Q1.

AC is the greatest side, therefore is hypotenuse. AB and BC are legs.

B is 90 deg as the two legs cross at this point.

Ratios:

sin = opposite / hypotenusecos = adjacent / hypotenusetan = opposite / adjacent

BC is opposite to A and adjacent to C

AB is adjacent to A and opposite to C

sin A = cos C = 8/10 = 4/5cos A = sin C = 6/10 = 3/5tan A = cot C = 8/6 = 4/3tan C = cot A = 6/8 = 3/4

Q2.

a) Answered above

b) Answered above

answers for the 2 boxes please :)​

Answers

Answer:

(8, - 5 )

Step-by-step explanation:

Given the 2 equations

3x + 4y = 4 → (1)

- x - 3y = 7 → (2)

Multiplying (2) by 3 and adding to (1) will eliminate the x- term.

- 3x - 9y = 21 → (3)

Add (1) and (3) term by term to eliminate x, that is

0 - 5y = 25

- 5y = 25 ( divide both sides by - 5 )

y = - 5

Substitute y = - 5 into either of the 2 equations and solve for x

Substituting into (1)

3x + 4(- 5) = 4

3x - 20 = 4 ( add 20 to both sides )

3x = 24 ( divide both sides by 3 )

x = 8

solution is (8, - 5 )

sorry mine was a mistake

Other Questions
What are thecoordinates ofthe outlier in thescatterplotshown? i will mark u as the brainlest if you can help me with 4 question eremy constructed this solid by combining two rectangular prisms and a square pyramid.A rectangular prism with a length of 6 meters, width of 14 meters, and height of 2 meters. A rectangular prism with a length of 5 meters, width of 8 meters, and height of 3 meters. A square pyramid with a base of 6 meters by 6 meters and triangular sides with a height of 7 meters.What is the surface area of this figure?_____________ square meters320322368386 2C3H7OH + 9O2 --> 6CO2 + 8H2ODetermine the number of grams of CO2 produced from the reaction of 5.55 moles of C3H7OH What is the density of an object with a mass of 34g and a volume of 13 cm3? What physical features did theAryan migrations passthrough? Who know this answer Work out the percentage change to 2 decimal places when a price of 125.99 is increased to 150. The perimeter of a square is 68 inches. Write and solve an equation to find the length of its sides. 21 The graph of an exponential function is shown on the grid.Based on the graph, which statement about the function is true?A The range is the set of all real numbers less than 0.B The domain is the set of all real numbers greater than-4.C The range is the set of all real numbers greater than 0.D The domain is the set of all real numbers less than-4. A student is given a sample of an unknown solid and asked to identify it. The student begins by making a list of questions to investigate about the sample.BRAINLY QUICK!Which question would be the least useful in helping the student identify the sample? A) Is the sample soluble in water? B) What is the weight of the sample? C) Is the sample attracted to a magnet? D) What is the melting point of the sample? The mass of an unidentified rock is 15.5 grams. Students determine the volume of the rock by placing the rock in a cylinder with water. What was the density of the rock that the students should have calculated?Hint: The graduated cylinder measures volume. Read the difference in water level. A symbol in art is a picture that stands for something.TrueFalse PLZ I NEED HELP ILL GIVA YALL BRAINLIEST A majority of the seed is made up of the...a) seed coatb) testac) endospermd) radicle Which situation can be represented by 4x + 20 = 9x ?The price of 9 books is $20 more than the price of 4 books. What is the price of a book?The price of 4 books is $20 more than the price of 9 books. What is the price of a book?The price of 9 books equals $24. What is the price of a book? Joyce bought x number of $4 books and $9 books. She spent $20. How many books of each price did she buy? Matt is given 9/10 hours to shovel a driveway. He only uses 2/3 of the given time to shovel the driveway. How much time is left? purchase.1. The young man was well-dressed becauseA.it was his habit to dress wellB.it was his wedding dayChe wanted to meet the manager of the shopD. he wanted to impress the salesmen How did the Roosevelt Corollary affect Latin America?The region requested greater U.S. involvement in its political affairs.The region experienced several U.S. military interventions.The region gained greater economic independence. Calculate the volume of a box which is 125 cm long, 37 cm wide, and 68 cm high. Report your answer with correct significant figures in cubic centimeters. please use significant figures!Calculate the volume of a box which is 423 cm long, 12 cm wide, and 25 cm high. have significant figures in cubic centimeters.Suppose you are measuring the mass of a solid sample on a balance using a weigh boat. You record the data in a table. Mass of weigh boat 1.326 g Mass of weigh boat and sample 7.635 g What is the mass of the solid sample?A graduated cylinder contains 10.00 mL water. A 14.74 g piece of aluminum is added to the water, and the volume rises to 15.46 mL. What is the density of the aluminum?A 24.5 g sample of solution has a density of 0.768 g/mL. What is the sample volume (in mL)?