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2 years ago

How do you solve 21/4=1/2x+3x and whats the answer?

1 answer:

6 0

Hi there!

To solve is pretty easy. First, simplify.

21/4=(1/2x+3x) -> Combine Like Terms
21/4=7/2x
FLIP
7/2x=21/4

Multiply both sides by 2/7.
(2/7)*(7/2x)=(2/7)*(21/4)
x = 2/3

Hope this helps!

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What are the powers of three that are in the range 3 through 1000

kirill115 [55]

3^1
3^2
3^3
3^4
3^5
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3 years ago

Determine whether the equation y-y=y is sometimes,always, or never true?

beks73 [17]

The answer is it is yes, it is sometimes true, y can =0

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3 years ago

Which best describes the value of 6 in 1.652? Since 6 is in the tenths place, the value of the digit is 0.06. Since 6 is in the

AysviL [449]

Answer:

Your answer would be:

Since 6 is in the tenths places, the value of the digit is 0.6

Hope this helps Buddy!

-Courtney

7 0

3 years ago

Read 2 more answers

18÷3(5-4+1) =??<br> 3 or 12 <br> how ?!

sergejj [24]

Answer:

Step-by-step explanation:

Parenthesis first:

5-4+1

5-4=1+1=2

18÷3×2

Divide:

18÷3×2

Multiply:

6×2=12

3 0

3 years ago

Read 2 more answers

Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well

laiz [17]

Answer:

The value is $P(A) = 0.133617$

Step-by-step explanation:

From the question we are told that

The mean is $\mu = 7.5$

The standard deviation is $\sigma = 0.2$

The safest water level is between 7.2 and 7.8

Generally the probability that the selected pool has a pH level that is not considered safe is mathematically represented as

$P(A) = 1 - P(7.2 \le X \le 7.8 )$

Here

$P(7.2 < X < 7.8 ) = P(\frac{ 7.2 - \mu }{\sigma } < \frac{X - \mu }{ \sigma }$

Generally $\frac{X - \mu }{ \sigma } = Z (The \ standardized \ value \ of X )$

$P(7.2 < X < 7.8 ) = P(\frac{ 7.2 - 7.5 }{0.2 } < Z$

$P(7.2 < X < 7.8 ) = P(-1.5 < Z$

=> $P(7.2 < X < 7.8 ) = P(Z < 1.5) - P( Z < - 1.5)$

From the z-table the probability of (Z < -1.5) and ( Z <1.5) are

$P(Z < 1.5) = 0.93319$

and

$P(Z < -1.5) = 0.066807$

$P(7.2 < X < 7.8 ) =0.93319 - 0.066807$

$P(7.2 < X < 7.8 ) =0.0866383$

$P(A) = 1 - 0.0866383$

=> $P(A) = 0.133617$

5 0

2 years ago