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3 years ago

Let y=21 and x=1.5 if y varies directly with x find y when x=9

2 answers:

8 0

Y would be 42. if you multiple 1.5 by 3 it will be 9. so if divide 21 by 1.5 it equals 14 so multiple 14 by 3 it gives you 42

AnnZ [28]3 years ago

7 0

If $y$ varies directly with $x$ then we have the following function:
$y=x + (21 - 1.5)$ or simply $y = x + 19.5$ .
So, when $x=9$ :
$y = 9 + 19.5 = 28.5$

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9x-23=49 what is the second step in this equation?

ladessa [460]

Answer:

Divide both sides by 9.

Step-by-step explanation:

To find the second step of the equation, we actually have to solve parts of the equation until we get to step 2.

Step 1: Add 23 to both sides.

$9x - 23 + 23 = 49 + 23$
$9x = 72$

Step 2: Divide both sides by 9.

$\frac{9x}{9} = \frac{72}{9}$
$x = 8$

Therefore, the second step is divide both sides by 9.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

5 0

2 years ago

Please help. will mark brainliest if its right.180-x=3(90-x)

DerKrebs [107]

<h2>hope it helps you please mark me as brainliest </h2>

4 0

3 years ago

WHICH INEQUILITY IS EQUIVALENT TO X-4<9

frez [133]

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Answer: $\textsf{x} < \textsf{13}$

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Given: $\textsf{x - 4} < \textsf{9}$

Find: $\textsf{The simplified inequality}$

Solution: In order to simplify the inequality we can simply add 4 to both sides which would isolate x.

<u>Add 4 to both sides</u>

$\textsf{x - 4 + 4} < \textsf{9 + 4}$

$\textsf{x} < \textsf{9 + 4}$

$\textsf{x} < \textsf{13}$

Therefore, an inequality that would be equivalent to the one that was provided in the problem statement is x < 13.

5 0

2 years ago

Read 2 more answers

How many words can be formed by using the W,X,Y,Z if repetitions is not allowed?

Setler [38]

Answer:

Step-by-step explanation:

What you have here is a permutation, seeing as each element can only be used once.

We have 4 letters initially, so we can choose any 1 as our first letter. We have 4 choices for our first letter

However, once we choose our first letter, we can't use it anymore, so, for our second letter, we can only choose from the remaining 3 letters.

Furthermore, once we choose our second letter, we can only choose our 3rd letter from the remaining two letters we didn't choose yet.

Finally, our last letter will always be the one we didn't choose the last 3 times. So there is only one choice here.

Going off of this, we have four choices for the 1st letter, three choices for the 2nd letter, two choices for the 3rd letter, and one choice for the 4th letter

The way to calculate how many permutations we have without repetition is using factorials

Where N is the number of elements you have.

In this case, it would be 4!

4! is 4 * 3 * 2 * 1

Which equals 24

If you notice, each number in 4! is the number of options we have for each choice. 4, then 3, and so on

5 0

2 years ago

Find the common ratio of the geometric sequence –4, 12, -36,...

sasho [114]

Answer: -3

Step-by-step explanation:

The common ratio of the geometric sequence –4, 12, -36,... is -3.

12/(-4) =-3

-36/(12) = -3

They both multiply -3 for the next number.

4 0

2 years ago