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3 years ago

In a class 30 of students, 5 are female and 23 have an A in the class. There are

Mathematics

1 answer:

djverab [1.8K]3 years ago

5 0

Answer:

20/30

Step-by-step explanation:

Five girls plus five boys equals ten, thirty minus ten equals twenty.

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Represent the following expressions as a power of the number a (a≠0): c ((a2)−2)5÷(a4a)3

s2008m [1.1K]

Answer:

1/a²⁷

Step-by-step explanation:

Given: $\frac{((a^2)^{-2})^5}{a^4.a^3}$

We know that when the bases are same the powers can be added. i.,e.,

(xᵃ)ᵇ = x ⁽ᵃ ⁺ ᵇ⁾

⇒ $\frac{((a^2)^{-2})^5}{a^4.a^3} \implies \frac{(a^2)^{-10}}{a^7}$

$\implies \frac{a^{-20}}{a^7} = a^{-20 - 7} = a^{-27}$

Also, $\frac{x^a}{x^b} = x^{a - b}$

This is nothing but, $\frac{1}{a^{27}}$ .

Note that $a$ cannot be zero here. The condition is provided in the question as well.

7 0

3 years ago

I buy 4.50 yards of material at $4.47 what is the totoal cost of material

Blizzard [7]

4.5 x 4.47 = ~ $20.12 total

4.5 yards of material

4.47 per yard

~20.12 total

6 0

3 years ago

What is 80 times 30 = plz help me

goblinko [34]

Answer:

80 x 30 = 2,400

Step-by-step explanation:

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3 years ago

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For the function ƒ(x) = x2 – 4, find the value of ƒ(x) when x = 6.

pashok25 [27]

Answer:

f(x)= 2x -4

when x=6

f(x) = 2(6)-4

=12-4

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3 years ago

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Factor 4x^4yz-16y^3z

Iteru [2.4K]

Answer:

Step-by-step explanation:

$4x^4yz-16y^3z\\\\4x^4yz=4yz\cdot x^4\\\\16y^3z=4yz\cdot4y^2\\\\4x^4yz-16y^3z=4yz\cdot x^4-4yz\cdot4y^2=4yz(x^4-4y^2)\\\\x^4-4y^2=x^{2\cdot2}-2^2y^2=(x^2)^2-(2y)^2=(x^2-2y)(x^2+2y)\\\\Used:\\\\(a^n)^m=a^{nm}\\\\(ab)^n=a^nb^n\\\\a^2-b^2=(a-b)(a+b)\\\\4x^4yz-16y^3z=4yz(x^2-2y)(x^2+2y)$

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3 years ago