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3 years ago

CAN SOMEONE HELP WITH THIS ASAP!!!!!! and explain how u got the answer

Mathematics

1 answer:

mixer [17]3 years ago

4 0

9514 1404 393

Answer:

12.4

Step-by-step explanation:

FD is marked as 6.2. It is a "midline" parallel to AC. A midline is half as long as the side it is parallel to.

AC = 2×6.2

AC = 12.4

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Simplify the following

Goshia [24]

Answer:

Step-by-step explanation:

Using the rules of logarithms

log $x^{n}$ = nlogx

$log_{b}$ b = 1

Then

$log_{x}$ $x^{9}$

= 9 $log_{x}$ x

= 9

4 0

3 years ago

Prove that if r is any rational number, then 3r2 − 2r + 4 is rational. The following properties may be used in your proof. Prope

ziro4ka [17]

Given:

Expression is

$3r^2-2r+4$

To prove:

If r is any rational number, then $3r^2-2r+4$ is rational.

Step-by-step explanation:

Property 1: Every integer is a rational number. It is Theorem 4.3.1.

Property 2: The sum of any two rational numbers is rational. It is Theorem 4.3.2.

Property 3: The product of any two rational numbers is rational. It is Exercise 15 in Section 4.3.

Let r be any rational number.

We have,

$3r^2-2r+4$

It can be written as

$3(r\times r)-2r+4$

Now,

3, -2 and 4 are rational numbers by property 1.

$r^2=r\times r$ is rational by Property 3.

$3r^2\text{ and }-2r$ are rational by Property 3.

$3r^2+(-2r)+4$ is rational by property 2.

So, $3r^2-2r+4$ is rational.

Hence proved.

6 0

3 years ago

Could Someone Help me with this? Plz

Deffense [45]

Volume of prism = area of base * height

as both prism are similar so,

if in smaller prism Length is 5 then in Larger it is 15 that is multiple of 3

similarly , breath and height will be also multiple of 3

so, V1 = 60

then V2 = 60 *3*3*3 = 1620 cubic cm

hope it helped

5 0

3 years ago

[please answer quickly] it takes 8 hours to paint a room. how long will it take to paint 2/3 of the room?

Lunna [17]

Answer:

5 hours 20 minutes.

Step-by-step explanation:

8 * 2/3

= 16/3

= 5 1/3

= 5 hours 20 minutes.

7 0

2 years ago

Write the sentence as an inequality.

Talja [164]

1.) 12+x is greater than or equal to 20
2.) 14 is greater than it equal to x
3.) 50 is greater than or equal to x

6 0

3 years ago