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3 years ago

Autumn bought a square frame for her desk that has an area of 361 square units.

Mathematics

1 answer:

iogann1982 [59]3 years ago

5 0

Answer: P=4a=4·361=1444

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MAY SOMEONE PLZ HELP ME ON THIS, I DONT KNOW THE EQACTION

just olya [345]

Answer:

I will use "complete-the-square" approach if thats ok

first 0.5(x - 2)² - 2

second -2(x - 4)² + 8

7 0

2 years ago

Which is the pair of congruent right angles?

Alex73 [517]

The little squares at corner-B and corner-E were drawn there
to show that those are right angles.

8 0

3 years ago

Read 2 more answers

The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c)

Ilya [14]

Answer:

$\bar X =\frac{2.3+3.1+2.8+1.7+0.9+4+2.1+1.2+3.6+0.2+2.4+3.2}{12}=2.29$

$s=1.09$

Step-by-step explanation:

For this case we have the following data given:

2.3 3.1 2.8

1.7 0.9 4.0

2.1 1.2 3.6

0.2 2.4 3.2

Since the data are assumedn normally distributed we can find the standard deviation with the following formula:

$\sigma =\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And we need to find the mean first with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X =\frac{2.3+3.1+2.8+1.7+0.9+4+2.1+1.2+3.6+0.2+2.4+3.2}{12}=2.29$

And then we can calculate the deviation and we got:

$s=1.09$

7 0

3 years ago

Read 2 more answers

Javier and tommy have money in their wallets. The sum of their money is $43. Javier has $11 more than Tommy. How much money do t

Savatey [412]

Answer:

Javier has 27, Tommy has 16

Step-by-step explanation:

43-11=32

32/2=16

16+11=27

Check: 27+16=43

4 0

3 years ago

Is a triangle with sides of length 6ft, 21 ft, 23 ft. A right triangle?

gayaneshka [121]

Answer:

Step-by-step explanation:

By using the Pythagoras theorem, it can be easily determined that whether the triangle is right triangle or not.

Thus, $a^{2}+b^{2}=c^{2}$ where where a and b are the legs and c is the hypotenuse.

Let a=6ft, b=21ft and c=23ft, then

$a^{2}+b^{2}=c^{2}$

$(6)^{2}+(21)^{2}=(23)^{2}$

$36+441=(23)^{2}$

$477=529$

which is not possible, therefore the given triangle is not right triangle because it does not satisfy the Pythagoras theorem.

7 0

3 years ago