All categories

3 years ago

The perimeter of a triangle is 65 meters. The second side is 5 meters less than the first side The third side is 7

Mathematics

2 answers:

Tom [10]3 years ago

8 0

Answer:

First side (x) $=21m$

Second side $=x-5=21-5=16m$

Third side $= x+7=21+7=28m$

Step-by-step explanation:

Perimeter of the triangle= Sum of all the three sides

Let the First side be $'x'$

Then, Second side $=x-5$

Third side= $x+7$

Perimeter $=65 m$

Perimeter of the triangle= First side + Second side + Third side

$65=x+(x-5)+(x+7)\\\\65=x+x+x-5+7\\\\65=3x+2\\\\3x=65-2\\\\3x=63\\\\x=63/3\\\\x=21 m\\\\$

First side (x) $=21m$

Second side $=x-5=21-5=16m$

Third side $= x+7=21+7=28m$

notsponge [240]3 years ago

6 0

Answer:

x=21

y=16

z=28

Step-by-step explanation:

Let

The first side=x

The second side =y

The third side=z

The rest is in the attached file

You might be interested in

HELP ASPAP!!!!! WILL MARK BRAINIEST standard deviation

Umnica [9.8K]

Answer:

The standard deviation of the given data is 11.34.

Step-by-step explanation:

We have to find the standard deviation for the given data;

Grade on No. of students

test (X) with that score (f) $X \times f$ $( X - \bar X)^{2}$ $f \times ( X - \bar X)^{2}$

50 1 50 1073.218 1073.2176

57 2 114 663.578 1327.1552

60 4 240 518.018 2072.0704

65 3 195 315.418 946.2528

72 3 216 115.778 347.3328

75 12 900 60.218 722.6112

77 10 770 33.178 331.776

81 6 486 3.098 18.5856

83 6 498 0.058 0.3456

88 9 792 27.458 247.1184

90 12 1080 52.418 629.0112

92 12 1104 85.378 1024.5312

95 2 190 149.818 299.6352

99 4 396 263.738 1054.9504

100 5 500 297.218 1486.088

Total 91 7531 11580.68

Firstly, the mean of the above data is given by;

Mean, $\bar X$ = $\frac{\sum X \times f}{\sum f}$

= $\frac{7531}{91}$ = 82.76

Now, the standard deviation of the data is given by;

Standard deviation, S.D. = $\sqrt{\frac{\sum f(X-\bar X)^{2} }{\sum f-1}}$

= $\sqrt{\frac{11580.68}{91-1}}$

= 11.34

Hence, the standard deviation of the given data is 11.34.

5 0

3 years ago

Kayla invests $8,213 in a savings account with a fixed annual interest rate of 6% compounded continuously. What will the account

Nastasia [14]

It is 5913.36. You have to multiply all of them together except that you have to turn the percent to a decimal before multiplying.

8 0

3 years ago

Read 2 more answers

HELP!!!!!!!!!! AP CALCULUS AB

raketka [301]

Answer:

$\lim_{x \to 5^{-}} f(x)= 54$

$\lim_{x \to 5^{+}} f(x) = -17$

Step-by-step explanation:

+ means we are approaching from the right

- means we are approaching from the left

We are given that if x < 5, it is x² + 5x + 4

So to find $\lim_{x \to 5^{-}} f(x)$ we would plug in 5 into that piecewise function part:

5² + 5(5) + 4 = 54

We would be approaching y = 54 if we approach from the left.

We are given that x > 5, it is -4x + 3

So to find $\lim_{x \to 5^{+}} f(x)$ we would plug in 5 into that piecewise function part:

-4(5) + 3 = -17

We would approach y = -17 if we approached from the right.

8 0

3 years ago

Read 2 more answers

Pls help im really bad at this stuff

Rasek [7]

Answer:

Student B

Step-by-step explanation:

Student B

Their wages increase at intervals of $6 each hour.

6*1 = $6

6*2 = $12

6*3 = $18

6*4 = $24

6*5 = $30

6*6 = $36

6*7 = $42

6*8 = $48

This shows a proportional relationship between the wages earned and the number of hours worked.

Hope this helps!

6 0

2 years ago

Read 2 more answers

Topic Background information: Climate change and ecosystems. Many studies have documented a clear pattern of climate change towa

zhannawk [14.2K]

Answer: Thanks for using Brainly! Vote Biden 2020

6 0

3 years ago