Mathematics Middle School

The perimeter of an equillateral triangle is 63 inches. If the length of each side is (4x-3), find the value of x.

Answers

Answer 1
Since all sides are congruent, the perimeter is 3 times the length of 1 side.

3(4x - 3) = 63

Divide both sides by 3:

4x - 3 = 21

Add 3 to both sides:

4x = 24

Divide both sides by 4:

x = 6
Answer 2
Hello there,
1 side= (4x-3)
3 sides= (4x-3)3
           = (12x-9)
To find the value of x,
12x-9= 63
12x= 63+9
12x=72
x=6

On side note: Remember to change the sign when it crosses the equal sign. (for example: -2 will become 2 once it crosses the equal sign)

Hope this helps:))

~Top

Related Questions

In 2007, the population of North America was approximately 5.15 x 10^8 people and the population of South America was approximately 3.04 x 10^8 people. What is the combined population of North and South America for this year?
A) 8.19 x 10^16 people
B) 8.19 x 10^9 people
C) 8.19 x 10^8 people
D) 8.19 x 10^64 people

Answers

C) 8.19 x 10^8 people 
c) 8.19 x 10^8 people is the answer 

Which pair represents equivalent ratios? 2/3 or 9/15

Answers

2/3. I think this is right. 

On two tests so far this year, a student received a 78 and a 93. The student wants an average between 80 and 90 inclusive. What are all of the possible scores for the third test so that the student falls within this average?

Answers

240 <= 171 + x <= 270
and now subtract 171 from all and get
69 <= x <= 99
So any score from 69 to 99 will do.

Dev knows he only has 8 gallons of gasoline in the tank he wants to go on a 300-mile trip will he have to buy more gasoline?

Answers

no he will not have to buy more gasoline

factor out the coefficient of the variable 1/4 y + 3/8

Answers

1/4 ( y + 1/8)
was 2/8 but simplified.

What are the domain and range of the function?

X Y
-2 -8
-1 -1
0 0
1 1
2 8
3 27

Answers:
A.
Domain: {0, 1, 2, 3, 8, 27}; Range: {–8, –2, –1}
B.
Domain: {–2, –1, 0, 1, 2, 3}; Range: {–8, –1, 0, 1, 8, 27}
C.
Domain: {–2, –1, 0, 1, 8, 27}; Range: {–8, –1, 0, 1, 2, 3}
D.
Domain: {–8, –1, 0, 1, 8, 27}; Range: {–2, –1, 0, 1, 2, 3}

Answers

the answer would be B

Karen wants to buy a $22.50 jacket that is marked 20% off. Select from the drop-down menu to correctly complete the sentence. The best estimate for the discount can be found using the expression

Answers

discount = price times % off

 discount = 22.50 x 0.20

discount = $4.50



Answer:

[tex]\$22.50*0.20=\$4.50[/tex]

Step-by-step explanation:

Let

x-------> original price

y------> percentage of discount

z-----> discount

we know that

[tex]z=xy[/tex]

In this problem we have

[tex]x=\$22.50[/tex]

[tex]y=20\%=\frac{20}{100}=0.20[/tex]

Substitute the values

[tex]z=\$22.50*0.20=\$4.50[/tex]

-2(v+5)-4v

use the distributive property to simplify.

PLS help!

Answers

Distributing:

-2(v+5) - 4v
-2v - 10 - 4v

Combining like terms:

-6v - 10

Hope this helps!

Perform the following calculation: (–16) – (–42)

Answers

That equals, positive 26
 - 16+42 which is 26
hope it helped

The currency in Argentina is the Peso. The exchange rate is approximately $3 = 1 Peso. At this rate, how many Pesos would you get if you exchanged $121.10?

Answers

3dollars/1=121.10dollars/x
3x=121.10
x=40.67

The answer is 40.67 dollars

Hope this helps
Final answer:

The Pesos you would get if you exchanged $121.10 using an exchange rate of $3 = 1 Peso, you can set up a proportion and solve for x.

Explanation:

To calculate how many Pesos you would get if you exchanged $121.10 at an exchange rate of $3 = 1 Peso, you can set up a proportion:

$3 / 1 Peso = $121.10 / x Pesos

Cross multiply to solve for x:

$3 * x = $121.10 * 1

x = $363.30

Therefore, you would get 363.30 Pesos if you exchanged $121.10 at the given exchange rate.

Learn more about Exchange rate here:

https://brainly.com/question/34627038

#SPJ11

Beth bought a T-shirt for $14.98 and a pair of shorts for $23.59. How much did Beth spend?

Answers

You have to add
14.98 + 23.59 = 38.57

Answer:

38.57

Step-by-step explanation:

Please help me please. What is the slope of a line perpendicular to the line whose equation is 5x-2y=11?

Answers

-2/5 would be the slope

slope is y = mx+ b

-2y = -5x + 11

-2y/-2 = (-5x + 11)/-2

y = 5/2x - 5.5

hope this helps

The dance committee has 1036 flowers.They want to divide the flowers evenly among 28 centerpieces.How many flowers will be in each centerpiece? A 28 B 34 C 37 D 40

Answers

C 37 is the answer I got! Hope this helps!
All you have to do is divide 1036 by 28

1036/28=37

So the answer is C. 37

what is -3x + b = 6x . Solve for x

Answers

The answer is x = b/9
-3x+b=6x add 3x to both sides
B=9x den divide 9 to both sides b/9=x hope this helps have a nice nite!

Denny rode his bicycle miles in the morning. Then he rode miles in the afternoon. How far did he ride his bicycle altogether?

Answers

How many miles did he ride each time?? Just add them up

What is 5 units away from (-1, -2)

Answers

Answer:


Step-by-step explanation:

There's a whole family of points.

(x + 1)^2 + (y + 2)^2= 25

The above is an equation that represents a circle.

Three points are marked below 2 of which are easily seen to be 5 units away from the center (-1,-2)

is xy=6 a linear equation

Answers

That equation is a linear equation
This equation isn’t a linear equation.

Dallison cooked a 5-pound roast for supper. What is the estimated mass in grams

Answers

Estimated mass in grams is 2240 grams 

I need to know all of these

Answers

1.) 5
2.) 2
3.) u - 17
4.) 7
5.) x + 6
I hope this helps love! :)
1 ) 10 - 5 = 5
2)  14 / 7 = 2
3)  u - 17
4) 1/2 (14) = 7
5) x + 6

Find the take-home percent of the gross pay: net pay $453.10, gross pay$734

50%

16%

162%

62%

Answers

453.10/734 = .617% * 100 = 61.7% --> 62%

D. 62%

Answer:

Option D. 62%

Step-by-step explanation:

Net pay = $453.10

Gross pay = $734.00

We have to find the take-home percent of the gross pay.

We will divide net pay by gross pay and multiply by 100.

Percent of the gross pay =  [tex]\frac{453.10}{734}\times 100[/tex]

                                         = 0.617302452 × 100

                                         = 61.73 ≈ 62%

The take-home percent of the gross pay would be 62%.

Which expression equals -(9x + 8) - 2(x -5)

Answers

-(9x + 8) - 2(x -5)
= -9x - 8 - 2x + 10
= -11x + 2
It is 5.5440 that is your answer

What is the sum of -7/18 and -3/6
a.) -4/9
b.) - 8/9
c.) 4/9
d.) 8/9

Answers

Answer:

-b) -8/9

Step-by-step explanation:


Answer:

The correct Answer is B.) -8/9

Step-by-step explanation:

HAVE AN AMAZING DAY!!

Me. Driscoll has 9 reports to grade. There are 6 page for each report. He grades 12 pages. How many pages does he still have to grade?

Answers

so easy

so driscoll has 9 reports to grade and each page has 6 pages.

just multiply 9 and 6 which gives you your answer 54.

so out of 54, he has graded only 12 pages which means that you need to subtract.

[tex]54-12=42[/tex]

driscoll has 42 pages left to grade.

you can recheck your answer by adding 42 ans 12 which gives your answer as 54. so yup our answer is right. 
Woops, new to this. As I was trying to say, it is actually really simple if you try to figure it out. The answer is 42.

A passenger train has 15 cars that each hold the same number of passengers. The train is filled with 1,020 passengers. How many passengers does each car hold?

Enter M for multiplication or D for division.

Answers

What you use is D and the answer to it is 68 passengers

Division - Basically it's just =

1,020 D 15 = 68

the line parallel to 3x + y = 8 that passes through (0, -4)

Answers

y=-3x+8

y+4=-3(x-0)

y+4=-3x+0

y=-3x-4 is the answer

What is the value of expression? 57.8 x 64 HELP PLEASE ASAP

Answers

The answer to 57.8 x 64 is 3,699.2

Denise finished the race in 5.93 minutes.If Tara took 4.6 times as long to finish the race, how many minutes did it take her to finish?

Answers

So like Texa said. 4.6 * 5.93 = 27.278.
So we are now gonna round the 7 in 27.278.
The 7 in the tenth place.
Look next door 5 or more raise the score.....
So the 7 will become a 8 and you can erase the other 8.
So your answer is!
27.28
4.6 * 5.93 = 27.278 rounds to 27.28 minutes

If a 25 foot tall tree cast a 15 foot shadow, what is the height of a tree if it’s shadow is 6 feet long

Answers

set this up as a ratio

25 ft tree / 15 foot shadow = X ft tree / 6 foot shadow

25/15 = X/6

 cross multiply:

150 / 15x

x = 150/15 = 10

 the tree is 10 feet tall

2/5ab What are the factors of the expression? Drag all of the factors of the expression into the box. Factors −1 2 5 2 5 a b

Answers

2/5, a, and b that is the answer

Multiply: 2 4/5 x -5 2/3

Answers

-15  13/15 sorry you dont have a calculator by the way
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