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k0ka [10]
2 years ago
13

Which expression are differences of squares Select each correct answer

Mathematics
1 answer:
Gennadij [26K]2 years ago
4 0

Answer:

options are 3 and 4

Step-by-step explanation:

The difference of squares is defined as In option 1,

It can be written as

It is the sum of squares, therefore the option 1 is incorrect.

In option 2,

The number 40 is not a complete square of any number, therefore option 2 is incorrect.

In option 3,

It can be rewritten as

It is the difference of squares, therefore option 3 is correct.

In option 4,

It can be rewritten as

It is the difference of squares, therefore option 4 is correct.

have a good Day!

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What are the restrictions of the domain of the function F(x) = 1/x^2-9
Sonbull [250]
f(x)=\frac{1}{x^2-9}

The denominator can't be equal to 0.
x^2-9 \not= 0 \\
x^2 \not= 9 \\
x \not= -3 \ \land \ x \not= 3

The domain is all numbers except -3 and 3.
x \in \mathbb{R} - \{-3, 3 \}
6 0
3 years ago
A circle with a radius of 10 inches is placed inside a square with a side length of 20 inches. Find the probability that a dart
melamori03 [73]

Answer:

The correct answer is last option 78.5%

Step-by-step explanation:

Points to remember

Area of circle = πr²

Where r is the radius of circle

Area of square = a²

Where 'a' is the side length of square

<u>To find the area of circle</u>

Here r = 10 cinches

Area =  πr²

 =  3.14 * 10²

 = 3.14 * 100 = 314

<u>To find the area of square</u>

Here a = 20 inches

Area = a²

 = 20²

 = 400

<u>To find the probability percentage</u>

Probability = area of circle/Area of square

 = (314/400)*100

 78.5 %

7 0
3 years ago
Read 2 more answers
How do you do this question?
OLEGan [10]

Step-by-step explanation:

∫ dt / (cos²(t) ⁹√(1 + tan(t)))

If u = 1 + tan(t), then du = sec²(t) dt.

∫ du / ⁹√u

∫ u^(-1/9) du

9/8 u^(8/9) + C

9/8 (1 + tan(t))^(8/9) + C

7 0
3 years ago
_11] If the radius of a circle is 5, what is the circumference?
ArbitrLikvidat [17]

Answer:

Step-by-step explanation:

A circle with a radius of 5 units has a circumference of 31.416 units.

8 0
3 years ago
127 3/4 miles is 35% of what number of miles?
ale4655 [162]

Answer:

It is the 35% percent of 365 miles.

Step-by-step explanation:

Use formula,

35%*x=127 3/4

4 0
3 years ago
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