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2 years ago

Solve for x. Round to the nearest tenth of a degree, if necessary.

Mathematics

1 answer:

Anna35 [415]2 years ago

6 0

Answer:

31.8 degrees

Step-by-step explanation:

Here the sine of x = (opposite side) / (hypotenuse) = 39/74. Using a calculator with the inverse trig functions built in, we find

arcsin 39/74 = 31.8 degrees

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Perform the multiplication, (7x2+a2)(x2–3a2)

aksik [14]

Answer:

The given multiplied expression is

$(7x^2+a^2)(x^2-3a^2)=7x^4-20x^2a^2-3a^4$

Step-by-step explanation:

Given expression is $(7x^2+a^2)(x^2-3a^2)$

To find the multiplication of the given expression :

$(7x^2+a^2)(x^2-3a^2)$

By using the distributive property to solve the given expression as below

$(7x^2+a^2)(x^2-3a^2)=(7x^2)(x^2)+(7x^2)(-3a^2)+(a^2)(x^2)+(a^2)(-3a^2)$

$=7x^2.x^2-21x^2a^2+a^2x^2-3a^2.a^2$

$=7x^{2+2}-21x^2a^2+a^2x^2-3a^{2+2}$ ( by using the property $a^m.a^n=a^{m+n}$ )

$=7x^4-21x^2a^2+a^2x^2-3a^4$

Adding the like terms in the above expression we get

$=7x^4-20x^2a^2-3a^4$

Therefore $(7x^2+a^2)(x^2-3a^2)=7x^4-20x^2a^2-3a^4$

Therefore the given multiplied expression is

$(7x^2+a^2)(x^2-3a^2)=7x^4-20x^2a^2-3a^4$

8 0

3 years ago

8. The area of the bigger square at the picture is 32. What is the area of

Karolina [17]

Answer:

16 is the awnser or at least I belive

8 0

3 years ago

If Joan reads 75 pages in 4 hours how long will it take her to read 250 pages?

uysha [10]

Answer:10 hours to read all 250 pages

Step-by-step explanation:

4 0

3 years ago

What is the area of circle C when the radius is 0.4cm

Solnce55 [7]

I think it’s 0.5, sorry if it’s wrong

7 0

3 years ago

If you can read this please answer it

Harlamova29_29 [7]

Indirect proportion: y = k/x.

Here, y = 2 / (3x); x is in the denominator of the fraction. Thus, this equation does represent indirect proportion, with k = (2/3).

2/3
y = -------
x

6 0

3 years ago