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Kipish [7]
4 years ago
14

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

Mathematics
2 answers:
avanturin [10]4 years ago
6 0
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
Nat2105 [25]4 years ago
4 0
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
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3 years ago
NEED HELP ASAP!! WILL MARK BRAINLIEST IF ITS RIGHT!!
Karo-lina-s [1.5K]

Answer:

First one: yes

Second one: yes

Third one: no

Step-by-step explanation:

To find the midpoint of a line segment, you take the x and y coordinates of the 2 points, add each of them up, and divide each of them by 2.

First one: x = (1+3)/2 = 2, y = (2+4)/2 = 3, so it's correct.

Second one: x = (-1+3)/2 = 1, y = (1+-1)/2 = 0, so it's correct.

Third one: x = (-3+-1)/2 = -2, y = (0+5)/2 ≠ 2, so it's not correct.

I really hope this helped.

3 0
3 years ago
Darla drives at a constant speed of 45 miles per hour. If she drives for y miles and it takes her x hours, write the two-variabl
Darya [45]

Answer:

y = 45x miles

Step-by-step explanation:

Speed is the rate of change of distance with time. Mathematically,

speed = distance/time

Given that Darla travels at a constant speed of 45 miles per hour and for y miles, it takes her x hours then

45 = y/x

multiply both sides by x

45x = y

then the number of miles (y) Darla can drive in x hours

y = 45x (in miles)

7 0
3 years ago
The price of one share of stock in BadInvestment.com plunged 14 points in 4 weeks. Find the average change in the stock price pe
kiruha [24]
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3 0
3 years ago
A 10-foot ladder touches the side of a building at a point 8 feet above the ground. At what height would a 22-foot ladder touch
WARRIOR [948]
<h2>Answer:</h2>

8.75 feet

<h2>Step by step:</h2>

Given that a 12 foot ladder leans against a building seven feet above the ground.

By using trigonometry ratio, the angle between the ladder and the ground will be

SinØ = opposite/ hypothenus

SinØ = 7 / 12

SinØ = 0.58333

Ø = Sin^-1(0.58333)

Ø = 35.69 degree

At what height would an 15 foot ladder touch the building if both ladders form the same angle with the ground?

Using the same trigonometric ratios

SinØ = opposite/hypothenus

Sin 35.69 = opposite/ 15

Cross multiply

Opposite = 15 × sin 35.69

Opposite = 8.75 feet

Therefore, the ladder will touch the building if both ladders form the same angle with the ground at height 8.75 feet.

6 0
3 years ago
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