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Alla [95]
3 years ago
13

A composite figure is formed by combining a square and a triangle. Its total area is 32.5ft sqaured. The area of the triangle is

7.5ft sqaured. What is the length vof each side of the square?
Mathematics
1 answer:
NeTakaya3 years ago
3 0

Answer:

The length of each side of square is <u>5ft</u>.

Step-by-step explanation:

Given:

A composite figure is formed by combining a square and a triangle. Its total area is 32.5ft squared.

The area of the triangle is 7.5ft squared.

Now, to find the length of each side of square.

Now, we need to get the area of the square first:

<u>Area of combined figure - area of triangle = area of square.</u>

32.5 ft squared - 7.5 ft squared = 25 ft squared.

So, area of square = 25 ft squared.

Now, by putting the formula for getting the length of each side:

Let the side = a.

Area of square = 25 ft squared

Area of square = a²

25 =a^{2}

<em>Using square root both sides we get:</em>

5=a

<em>So, the side = 5 ft.</em>

Therefore, the length of each side of square is 5ft.

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jonny [76]

Answer:

28

Step-by-step explanation:

-4×-4=16

3×4=12

12+16=28

6 0
3 years ago
Read 2 more answers
Question Help Scores of an IQ test have a​ bell-shaped distribution with a mean of 100100 and a standard deviation of 1010. Use
3241004551 [841]

Answer:

a) 95% percentage of people has an IQ score between 80 and 120.

b) 68% percentage of people has an IQ score between 90 and 110.    

c) 2.5% percentage of people has an IQ score greater than 120.          

Step-by-step explanation:

The empirical formula states that:

  • The empirical rule is known as the three-sigma rule or 68-95-99.7 rule.
  • It is a rule which states that for a normal distribution, almost all data falls within three standard deviations of the mean.
  • 68% of data falls within the first standard deviation that is \mu \pm \sigma
  • 95% of data falls within the second standard deviation that is \mu \pm 2\sigma
  • 99.7% of data falls within the third standard deviation that is \mu \pm 3\sigma

a)  percentage of people has an IQ score between 80 and 120

(80, 120) can be written as:

(80, 120) = (100-2(10), 100 + 2(10))\\= (\mu \pm 2\sigma)

Thus, it is the interval within two standard deviation from the mean.

Thus, by empirical formula, 95% percentage of people has an IQ score between 80 and 120.

b) percentage of people has an IQ score between 90 and 110

(90, 110) can be written as:

(90, 110) = (100-1(10), 100 + 1(10))\\= (\mu \pm 1\sigma)

Thus, it is the interval within one standard deviation from the mean.

Thus, by empirical formula, 68% percentage of people has an IQ score between 90 and 110.

c) P(score greater than 120)

= 1 - percentage of score less than 80 - percentage of score between 80 and 120

= 1 - (95\% + 2.5\%) = 2.5\%

From empirical formula,

2.5% percentage of people has an IQ score greater than 120.

6 0
3 years ago
Plz help 7x^2 - 6(x + 3)
max2010maxim [7]

Answer:

7x² - 6x - 18

Step-by-step explanation:

7x² - 6(x + 3)

multiply with -6

7x² - 6x - (6 × 3)

evaluate

= <u>7x² - 6x - 18</u>

4 0
2 years ago
4a+6b=10<br> 2a-4b=12<br><br> what does 12a =?
Usimov [2.4K]
If you have at least as many equations as your have unknown variables, the 'system' is solvable (unless the equations are copies of eachother).

In this case, isolate one letter and plug it in the other. I'm going for the 2a in the bottom one (it doesn't matter)

2a - 4b = 12 => (divide by two and move the b's to the other side)

a = 6 + 2b. (plug this one into the top equation)

4(6+2b) + 6b = 10 => 24+8b+6b = 10 => 24 + 14b = 10 => 14b = -14 => b=-1

a = 6 + -2 = 4.

So a=4 and b=-1. 


4 0
3 years ago
Four people equally share 3/4 of a whole pizza. What fractional part of the whole pizza does each person receive?
Ugo [173]

Answer:

3/16

Step-by-step explanation:

6 0
3 years ago
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