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3 years ago

Which is equal to 12.74 divided by 13

Mathematics

2 answers:

Shkiper50 [21]3 years ago

7 0

12.74 divided by 13 is 0.98.

Hope that helped:)

antiseptic1488 [7]3 years ago

4 0

The answer is 0.98 i hope this helps

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In the expansion (ax+by)^7, the coefficients of the first two terms are 128 and -224, respectively. Find the values of a and b

madam [21]

Answer:

a = 2, b = 3.5

Step-by-step explanation:

Expanding $(ax+by)^7$ using Binomial expansion, we have that:

$(ax+by)^7$ =

$(ax)^7(by)^0 + (ax)^6(by)^1 + (ax)^5(by)^2 + (ax)^4(by)^3 + (ax)^3(by)^4 + (ax)^2(by)^5 + (ax)^1(by)^6 + (ax)^0(by)^7$

$= (a)^7(x)^7+ (a)^6(x)^6(b)(y) + (a)^5(x)^5(b)^2(y)^2 + (a)^4(x)^4(b)^3(y)^3 + (a)^3(x)^3(b)^4(y)^4 + (a)^2(x)^2(b)^5(y)^5 + (a)(x)(b)^6(y)^6 + (b)^7(y)^7\\\\\\= (a)^7(x)^7+ (a)^6(b)(x)^6(y) + (a)^5(b)^2(x)^5(y)^2 + (a)^4(b)^3(x)^4(y)^3 + (a)^3(b)^4(x)^3(y)^4 + (a)^2(b)^5(x)^2(y)^5 + (a)(b)^6(x)(y)^6 + (b)^7(y)^7$

We have that the coefficients of the first two terms are 128 and -224.

For the first term:

=> $a^7 = 128$

=> $a = \sqrt[7]{128}\\ \\\\a = 2$

For the second term:

$a^6b = -224$

$b = \frac{-224}{a^6}$

$b = \frac{-224}{2^6} \\\\\\b = \frac{-224}{64} \\\\\\b = 3.5$

Therefore, a = 2, b = 3.5

5 0

3 years ago

What is 1. - ------- Of 40? - 10

raketka [301]

This is what you do. You multiply 1/10 and 40. Like this: 1/10 x 40/1

3 0

3 years ago

If you blink your eyes 65 times in 5 minutes, how many times would you blink your eyes in 80 minutes?

Vikentia [17]

5,200 is the answer

3 0

4 years ago

Read 2 more answers

Find x for each of these triangles please

notka56 [123]

Answer:

8) 10°

9) X can not be determined.

10) 10°

11) 12 units.

Step-by-step explanation:

8) The three sides of the given triangle are equal. Hence, the triangle is an equilateral triangle, hence each angle will be 60°.

So, 6x = 60°

⇒ x = 10°.

9) The three angles of the given triangle are equal. Hence, the triangle is an equilateral triangle, hence each side will be equal.

So, 6x - 5 = 6x

So, x can not be determined from this equation.

10) Δ KLM is equilateral, so, KN will bisect ∠ MKL. So, ∠ NKL = 30°

Hence, 3x = 30°

⇒ x = 10°

11) In Δ XYZ, XZ = XY , so, ∠ Z = ∠ Y.

Again, ∠ X is given to be 60°.

Therefore, each angle is 60°.

So, the triangle XYZ is equilateral, and each side will be equal.

So, 3x + 8 = 4x - 4

⇒ x = 12 units. (Answer)

3 0

3 years ago

Will give brainliest please help

victus00 [196]

I would say this is the answer:
You can put this solution on YOUR website!
<span>a right triangle has 2 legs and a hypotenuse.
the hypotenuse is opposite the 90 degree angle.
the 2 legs are opposite the other angles of the triangle.
if you know 2 of the dimensions then you simply use the formula to solve for the remaining dimension.
assume one of the legs is equal to a and the other leg is equal to b and the hypotenuse is equal to c.
then the formula is:
c^2 = a^2 + b^2
suppose you know the value of a and b
you substitute for a and b in the equation and solve for c.
assume a = 6 and b = 8
the formula becomes:
c^2 = 6^2 + 8^2 = 36 + 64 = 100

now you take the square root of both sides of the equation to get:
c = sqrt(100) = 10
now suppose you knew that c was equal to 10 and a was equal to 6.
your equation of:
c^2 = a^2 + b^2 becomes:
10^2 = 6^2 + b^2 which becomes:
100 = 36 + b^2
you subtract 36 from both sides of the equaton to get:
100 - 36 = b^2
you simplify to get:
64 = b^2
you take the square root of both sides of the equation to get:
8 = b

Hope I could Help! Can I have Brainliest!</span>

5 0

4 years ago

Read 2 more answers