All categories

3 years ago

I really need help marking Brainliest if its right please explain your answer Make sure its correct:D..Please Help!

Mathematics

1 answer:

Lelechka [254]3 years ago

7 0

Answer:

answer is b

yes because 15-8=7 is true

Step-by-step explanation:

15-8=7

You might be interested in

What is 1/5 out of 40

artcher [175]

1/5 out of 50 I think is 8
I'm not 100% sure though

5 0

3 years ago

Read 2 more answers

Can someone please help me!!!!!!

Lapatulllka [165]

Answer:

Step-by-step explanation:

8 0

3 years ago

1/13

levacccp [35]

Answer:

y=20-3x

Step-by-step explanation:

7 0

3 years ago

Work out the area of this circle. Give your answer in terms of pie and state it’s units.

ollegr [7]

What I don’t get it

6 0

3 years ago

(−5)3x7(yz)4 / (3)2x2y8z2

g100num [7]

Answer:

$\dfrac{(-5)3x^7(yz)^4}{(3)2x^2y^8z^2}=\dfrac{-5x^5z^2}{2y^4}$

Step-by-step explanation:

Given:

The expression to simplify is given as:

$\frac{(-5)3x^7(yz)^4}{(3)2x^2y^8z^2}$

In order to simplify this, we have to use the law of indices.

1. $(ab)^m=a^mb^m$

So, $(yz)^4=y^4z^4$

Substitute this value in the above expression. This gives,

$=\dfrac{(-5)3x^7y^4z^4}{(3)2x^2y^8z^2}\\\\\\=\dfrac{-15x^7y^4z^4}{6x^2y^8z^2}......(-5\times 3=15\ and\ 3\times 2=6)$

Now, we use another law of indices.

2. $\frac{a^m}{a^n}=a^{m-n}$

So, $\frac{x^7}{x^2}=x^{7-2}=x^5,\frac{y^4}{y^8}=y^{4-8}=y^{-4}, \frac{z^4}{z^2}=z^{4-2}=z^2$

Substitute these values in the above expression. This gives,

$=\frac{-15}{6}\times x^5\times y^{-4}\times z^2\\\\=\frac{-5x^5y^{-4}z^2}{2}$

Finally, we further simplify it using the law $a^{-m}=\frac{1}{a^m}$

So, $y^{-4}=\frac{1}{y^4}$

Therefore, the given expression is simplified as:

$\dfrac{(-5)3x^7(yz)^4}{(3)2x^2y^8z^2}=\dfrac{-5x^5z^2}{2y^4}$

5 0

3 years ago