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3 years ago

Rewrite 17/20 and 21/25, so that they have a common denominator then use <,>or = to order 17/20 and 21/25

1 answer:

4 0

The least common denominator is
20 = 2 * 2 * 5
25 = 5 * 5

The least common denominator has two 5s and two 2s.
LCD = 2*2*5*5 = 100

17/20 = 17 * 5/ 20*5 = 85 / 100
21/25 = 21* 4/25*4 = 84 / 100

Talk about close
17/20 > 21/25 <<<< answer

But I hate to have predicted that before hand.

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PLEASE ANSWER QUICKLY ASAP <br>ANSWER QUESTION A AND B

Evgen [1.6K]

Answer:

a) $a+b+c=\begin{pmatrix}-2\\-3\end{pmatrix}$

b) (i) $a+2c=\begin{pmatrix}-4\\2\end{pmatrix}$

(ii) $k=2$

Step-by-step explanation:

It is given that,

$a=\begin{pmatrix}4\\-10\end{pmatrix},b=\begin{pmatrix}-2\\1\end{pmatrix},c=\begin{pmatrix}-4\\6\end{pmatrix}$

We need to find the value of a+b+c.

$a+b+c=\begin{pmatrix}4\\-10\end{pmatrix}+\begin{pmatrix}-2\\1\end{pmatrix}+\begin{pmatrix}-4\\6\end{pmatrix}$

$a+b+c=\begin{pmatrix}4+(-2)+(-4)\\-10+1+6\end{pmatrix}$

$a+b+c=\begin{pmatrix}-2\\-3\end{pmatrix}$

(i) We need to find the value of a+2c.

$a+2c=\begin{pmatrix}4\\-10\end{pmatrix}+2\begin{pmatrix}-4\\6\end{pmatrix}$

$a+2c=\begin{pmatrix}4\\-10\end{pmatrix}+\begin{pmatrix}-8\\12\end{pmatrix}$

$a+2c=\begin{pmatrix}4+(-8)\\-10+12\end{pmatrix}$

$a+2c=\begin{pmatrix}-4\\2\end{pmatrix}$

(ii) It is given that a+2c=kb, where k is an integer. We need to find the value of k.

$a+2c=k\begin{pmatrix}-2\\1\end{pmatrix}$

$\begin{pmatrix}-4\\2\end{pmatrix}=\begin{pmatrix}-2k\\k\end{pmatrix}$

On comparing both sides, we get

$k=2$

4 0

3 years ago

Pls help with this question + 25 points + Brainliest for first

forsale [732]

Answer:

6.03

Step-by-step explanation:

x > −1/2

6 0

2 years ago

Read 2 more answers

A doctor wants her patient to take 60 milligrams of vitamin C and 20 centigrams of vitamin B6 daily. How many total milligrams o

irakobra [83]

Just as the conversion for millimeters to centimeters is, the conversion used here will be:
10 milligram = 1 centigram
Milligrams of vitamin B6 = 20 x 10
Milligrams of vitamin B6 = 200 mg

Total milligrams = 200 + 60
Total milligrams = 260

8 0

2 years ago

The system of equations is coincident.<br> What are the missing values?<br> x+3y=5<br> 4x+__y=__

scZoUnD [109]

$x+3y=5|\cdot4\\
4x+\Box y=\Box\\\\
4x+12y=20\\
4x+\boxed{12}y=\boxed{20}
$

3 0

3 years ago

In a class of 20 students 11 people have a brother 9 people have a sister 6 people have neither fill in the Venn diagram

Contact [7]

Answer:

Draw a Venn diagram with the left circle labeled brother, and the right labeled sister. Label the middle both and fhe outisde neither. Put 5 in brother, 3 in sister, 6 in both and 6 in neithrr.

Step-by-step explanation:

11+9 = 20

20-6 = 14

20-14=6

There are 6 that have both

7 0

2 years ago