Which ordered pair makes the equation y = 4 x + 21 true?

Answers

Answer 1

Answer: x=

1

4

y+

−21

4

Step-by-step explanation:

Let's solve for x.

y=4x+21

Step 1: Flip the equation.

4x+21=y

Step 2: Add -21 to both sides.

4x+21+−21=y+−21

4x=y−21

Step 3: Divide both sides by 4.

4x

4

=

y−21

4

x=

1

4

y+

−21

4


Related Questions

the fee for charging an electric car at station A is $2 to start and $4 for each hour or fraction of an hour. Which point is NOT included in the graph of this step function?
A. (2.5, 14)
B. (2, 10)
C. (0,0)
D. (1,6)

Answers

I think it is D


I think ok

The point (0, 0) is not lie on the graph of this step function.

What is an expression?

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

The fee for charging an electric car at station A is $2 to start and $4 for each hour or fraction of an hour.

Now,

Since, The fee for charging an electric car at station A is $2 to start and $4 for each hour or fraction of an hour.

Hence, We can formulate the function as;

⇒ y = 4x + 2

Substitute (x, y) = (0, 0), we get;

⇒ y = 4x + 2

⇒ 0 = 4 × 0 + 2

⇒ 0 ≠ 2

Thus, The point (0, 0) is not lie on the graph of this step function.

Learn more about the mathematical expression visit:

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Which set of decimals is in order from least to greatest

1. 0.35, 0.3, 0.03
2. 0.3, 0.03, 0.35
3. 0.03, 0.3, 0.35
4. 0.03, 0.35, 0.3

Answers

Answer:2 1 4 then 3

Step-by-step explanation:

The option (3) 0.03, 0.3, 0.35 represents the order from least to greatest. Option (3) is correct.

What is number?

A number is a mathematical entity that can be used to count, measure, or name things. For an example, 1, 2, 56, 0.3 etc. are the numbers.

We have decimal number:

0.35, 0.3, 0.03

Here, the smallest number is 0.03

And the greatest number is 0.35

So,

The order from least to greatest:

0.03 > 0.3 > 0.35

Thus, the option (3) 0.03, 0.3, 0.35 represents the order from least to greatest. Option (3) is correct.

Learn more about the number here:

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The math club has 4 members. 1 of the members is 8 years old.
What fraction of the math club is 8 years old?

Answers

Answer: 1/4

Step-by-step explanation: 1 out of the 4 members is 8 years old, so 1/4 or 025.

Answer:

1/4

Step-by-step explanation:

there are 4 and 1 is 8 years old

A backpack normally costs 25 dollars but it is on sale for 21 dollars. What percentage is the discount?

Answers

The packpack is 84% off.

What is the slope of a lone represented by the equation2y-x=-4

Answers

Answer:

slope = [tex]\frac{1}{2}[/tex]

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y= intercept )

Given

2y - x = 4 ( add x to both sides )

2y = x + 4 ( divide all terms by 2 )

y = [tex]\frac{1}{2}[/tex] x + 2 ← in slope- intercept form

with slope m = [tex]\frac{1}{2}[/tex]

Plsssss help I will mark you brainliest

Answers

Answer: 6y=13.5

Step-by-step explanation:

just multiply 6 by 2.25

Answer:

y = [tex]\frac{3}{8}[/tex]

Step-by-step explanation:

Given

6y = 2 [tex]\frac{1}{4}[/tex] ← change into an improper fraction

6y = [tex]\frac{9}{4}[/tex] ( multiply both sides by 4 to clear the fraction )

24y = 9 ( divide both sides by 24 )

y = [tex]\frac{9}{24}[/tex] = [tex]\frac{3}{8}[/tex]

I need help with this

Answers

Answer:

⁴√16³ˣ

Step-by-step explanation:

16³/⁴ ˣ

The above can be expressed as follow:

16³/⁴ ˣ = 16³ˣ/⁴

Recall:

Aᵐ/ⁿ = ⁿ√Aᵐ

Therefore,

16³ˣ/⁴ = ⁴√16³ˣ

Thus, 16³/⁴ ˣ is equivalent to ⁴√16³ˣ

help please i rlly don’t understand math

Answers

1. 1/4x is slope 8 is y intercept

2.-2x slope -3 y intercept

SOMEONE PLZ HELP ME

Crista pays $126 for 28 swimming lessons. Bill pays $30 for 6 lessons.

1. Who is paying more per swim lesson?
2. How much more per lesson is he or she paying?

Please answer both questions in sentence form. Include how you solved the problem - what did you do? Be specific!

Answers

Answer:

1. bill is paying more

2. bill pays more by 50 cents

Step-by-step explanation:

1. to find how much he pays for one lesson, divide $30 by the 6 swimming lessons

then you do the same the with crista

for one lesson bill pays $5

crista pays $4.50

2. 5 - 4.50 = .50

Write the slope-intercept equation of a line with slope 4 and y-intercept -11. *

Answers

Answer: y = 4x - 11

Step-by-step explanation:

m = 4b = -11

How do you find the slope of a line? How do you know if two lines are parallel? give examples

Answers

Answer:

finding slope: The slope will be the same for a straight line no matter which two points you pick as you know. All you need to do is to calculate the difference in the y coordinates of the 2 points and divide that by the difference of the x coordinates of the points(rise over run). That will give you the slope.

parallel: We can determine from their equations whether two lines are parallel by comparing their slopes. If the slopes are the same and the y-intercepts are different, the lines are parallel. If the slopes are different, the lines are not parallel. Unlike parallel lines, perpendicular lines do intersect.

hope this helps!

Answer:

The slope of a line is the rise/run of how far away the points are from each other. Say you have the equation y=3/4x-6, the slope is 3/4 so that means you plot your first point at -6 on the y-axis, because that is your y-intercept, and then you will go up 3, right 4. You will continue to do this until you have enough points to make a line. When two lines are parallel, they will always have the same slope. So the lines y=1/2x+4 and y=1/2x-3 are parallel because not only do they have the same slope, they do not intersect at all, which is a requirement for parallel lines. I hope this helps!!

Step-by-step explanation:

HELPPPP!!!!!!!
What is the diameter of X?

A) 12 cm
B) 04 cm
C) 8 cm
D) 2 cm

Answers

Dimeter = r x 2

r = 4 x 2 = 8 cm

Which comparison is true?
0 2.6 < 2.07
05.08 < 5.21
O 5.08 > 5.40
O 2.6 > 2.65

Answers

Answer:

The correct answer is C

Step-by-step explanation:

I took the test and got a 100

It’s C. As you see, 2.6 (2.06) is lower than 2.07, so that isn’t right, as for the rest but C. I hope this helps for later on as well!

© Given that R= 9x + 8y
Find X when y 3 and R= 5
Give your answer as an improper fraction in its simplest form.
answer??

Answers

Answer:

-19/9

Step-by-step explanation:

First, you would plug in the numbers for y and r. Therefore, your equation should now be 5 = 9x + 24. Now you would put like terms on the same side. It now then look like -19 = 9x. You divide by 9 to get the x by itself. The answer should be x = -19/9.

| 2x + 9 | = 15
Help pls

Answers

Answer:

x = 3 and x = -12

Step-by-step explanation:

To solve an absolute value equation, you create two equations, one where the right side is negated and one where the right side isn't:

| 2x + 9 | = 15 becomes:

2x + 9 = 15 and 2x + 9 = -15

2x = 6 and 2x = -24

x = 3 and x = -12

Why this works is that |-x| and |x| will both be equal to 0. Remember that absolute value is the distance a number is away from 0.

A community orchestra is losing money. They have always sold tickets for
$12, but they decide to increase the price by $3. For their next concert, they
sell 200 tickets at the increased price.
Select the expression representing the amount of money earned from ticket
sales.
A. 200(12+3)
B. 200(12) + 3
C. 200(12-3)
D. 200(12) - 3
Help ASAP will give brainliest

Answers

Answer:

Step-by-step explanation:

I think it's a or b

Answer:

a

Step-by-step explanation:

Help please !!!!!!! DUE NOWWW

Answers

Answer:

2

Step-by-step explanation:

mike opened a savings account and deposited $300.00. The account earns 11% interest, compounded annually. If he wants to use the money to buy a new bicycle in 2 years, how much will he be able to spend on the bike?

Answers

He will be able to spend 366 for the bike because every year he gets 33 dollars(the 11% interest)

5x + y = 11
4x + y = 9​

Answers

The first one is -5
The second one is -4

I will mark you brainiest if you can answer this

Answers

12.444 and b is 57.888

Answer:

Step-by-step explanation:

a) PQ' / PQ = 12/8 = 3/2

  Q'R' / QR = 15/10 = 3/2

  PR' / PR = 9/6 = 3/2

b) this means that triangle PQR is congruent to triangle PQ'R'. Because if we divide each side we get 3/2 (SSS)

c) because QR and Q'R' are parallel and they have same angles.

now please mark me brainliest as you promised

Suppose f(x) = x2 + 1. Find the graph of
f(4x).

Answers

Answer:

Step-by-step explanation:

2(4x) + 1 = 8x + 1

graph

Simplify the expression by combining like terms. -8y + 2 + 10y - 7
Please help

Answers

Answer:

2y - 5 (read below)

Step-by-step explanation:

-8y + 10y = 2y

2 + (-7) = -5

Your expression could/would be:

2y - 5.

Hope this helps!

Answer:

you can combine -8y and 10y since 8 is negative it would be =2y

an you can do 2+-7=-5

Using the functions f(x) = (3 - x)/(x2 + 4) and g(x) = 3x, find the value of (f*g)(2).

Answers

9514 1404 393

Answer:

  (f×g)(2) = 3/4

Step-by-step explanation:

For each of the functions, put 2 where x is and evaluate the expression.

  f(2) = (3 -2)/(2² +4) = 1/8

  g(2) = 3×2 = 6

Then the product is ...

  (f×g)(2) = f(2)×g(2) = (1/8)×6 = 6/8

  (f×g)(2) = 3/4

The volume of a box 4in wide 2in high and 5in long is

Answers

Answer:

40 cubic inches

Step-by-step explanation:

The Formula for Volume: Length x Width x Height (L x W x H)

4 times 2 times 5 = 40

Abigail orders a book and
two identical DVDs from
Amazon. The total bill is
$42.95. If the book
costs $7.65, then how
much does each DVD
cost?

Answers

Answer:

$17.65

Step-by-step explanation:

First you have to subtract $7.65 from the total cost, $42.95.

Now, you have $35.30. Since she bought 2 DVD's, you have to divid $35.30 by 2.

Your answer is now $17.65, meaning that each DVD cost $17.65.

Read doccument attached

Answers

Answer:

48.6 km/hr

Step-by-step explanation:

(135/10)×(18/5)

48.6 km/hr

PLEASE HELP ASAP!!!!

Carly mowed 2 more lawns than Rocco each week for 6 weeks. Carly mowed a total of 18 lawns. How many lawns did Rocco mow each week?

BEST ANSWER WILL BE MARKED BRAINLIEST!!!​

Answers

Answer:

I think she mowed 6 lawns.

Step-by-step explanation:

Answer:

1 lawn each week

Step-by-step explanation:

Rocco lawns mowed each week=x

Carly's lawns mowed each week=x+2

Equation to show how much Carly lawned for 6 weeks

18 is the total amount of lawns

6 is the number of weeks

6(x+2)=18

Solve for x

6x+12=18

Subtract 12 on both sides

6x=6

x=1

x is the amount that Rocco lawned

OMG SOMEONE DO THESE FOR ME AND ILL GIVE U BRAINLIEST

Answers

1. 9:15
2. 2:00
3. 11:45
4. 7:45
5. 4:15
6. 6:30

3(10-2x)-12=-2(x-11)+4​

Answers

Answer:

X=-2 I hope this helps

Martha needs 28 strawberries for every 4 smoothies she makes. plete the table using equivalent ratios.​

Answers

Answer:

strawberries smoothies

28 4

21 3

70 10

Step-by-step explanation:

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