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Scorpion4ik [409]
3 years ago
11

The figure shown is an equilateral triangle. Calculate the length of each side and give your answer in cm.

Mathematics
1 answer:
cricket20 [7]3 years ago
4 0
Given at you have an equilateral triangle, all sides have the same length.

Therefore,
First side 2x-7 = Second side x+y-9 = Third side y+5

Let us look at the second and third sides for now:
x+y-9 = y+5
x = y+5 - (y-9)
x = y-y+5+9
x = 14

Then we look at equating the first and third sides:
2x-7 = y+5
y = 2x-7-5

Substitute x =14 in the equation above:
y = 2(14)-7-5
= 28-7-5
= 21-5
= 16

The length of the third side is:
y+5 = 16 +5 = 21

Given that the length of each sides are the same in an equilateral triangle, all sides have the length 21cm.
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I need help with math algebra homework
lesya [120]

Answer:

1. Slope: -3/4

2. Point-slope: y+4=-3/4(x+4)

3. Slope-intercept: y=-3/4x-7

4. Standard form: 3x+4y=-28

Step-by-step explanation:

1. To find the slope, use the slope formula, which is: y2-y1/x2-x1.

Plug the y-coordinates into the top part of the equation and the x-coordinates into the bottom part.

2--4/-4-4

2+4/-8 = 6/-8, or 3/-4

2. Use the slope and one of the x and  y coordinates to put the equation into point-slope form. Recall that point-slope form is: y-y1=m(x-x1). Let's use the coordinates (4,-4).

y+4=-3/4(x+4)

3. To put the point-slope equation into slope-intercept form (y=mx+b), you need to distribute -3/4 to x+4 and subtract 4 from both sides.

When you distribute, the equation becomes:

y+4=-3/4x-3

Finally, when you subtract 4, the equation becomes:

y=-3/4x-7

4. Standard form is written as x+y= #.

To convert y=mx+b to standard form, first subtract -3/4x from both sides.

-3/4x + y = -7

Multiply everything by 4

3x + 4y = -28

3 0
3 years ago
I NEED HELP WITH THIS QUESTION
AveGali [126]

Answer:

y= 7 and -1

Step-by-step explanation:

4 0
3 years ago
I need help with this one and l also answered the first one but i’m not sure for this three angles
Norma-Jean [14]

Answer:

all three angles should add up to 180 so subtract what you know from 180 and you should be able to find everything from there

4 0
3 years ago
Hamid bought 4.5 pounds of strawberries. The total cost of the strawberries was 8.10. How much did each pound of strawberries co
Ray Of Light [21]

Answer:

<h2>1.80 per pound of strawberries</h2><h2 />

Step-by-step explanation:

8.10 / 4.5 pounds = 1.80 per pound of strawberries

4 0
3 years ago
Read 2 more answers
How many hours of sleep did you get last night? What fraction of the day is that? What is the decimal equivalent (use your calcu
rodikova [14]

Answer:

Step-by-step explanation:

how many hours of sleep did you get = 7 hours

What fraction of the day is that = 7/24

What it the decimal equivalent = 0.29 ( 2 decimal point)

What is the percentage = 1.68%

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3 years ago
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