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Drupady [299]
3 years ago
14

12x > 3(5x – 2) – 15 I NEED A STEP BY STEP ANSWER

Mathematics
1 answer:
Harrizon [31]3 years ago
8 0

Answer:

x < 7

Step-by-step explanation:

12x > 15x - 6 - 15

12x > 15x - 21

-3x > -21

x < 7

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Yati has a coin box containing some coins. 40% of the coins are 20-cent coins and the rest are 50-cent coins.
lana66690 [7]

The fraction that should be removed is 1/5.

<h3>How to calculate the fraction?</h3>

It should be noted that from the information, 40% of the coins are 20-cent coins and the rest are 50-cent coins. Those that are 50 cent will be:

= 100 - 40%

= 60%

The fraction that's should be removed will be:

= 2/5 - x = 1/5

x = 2/5 - 1/5

x = 1/5

The fraction that should be removed is 1/5.

Learn more about fractions on:

brainly.com/question/17220365

#SPJ1

7 0
2 years ago
If g(x)=2(x-4), find the value of x if g(x) =20<br><br><br>A. 32<br>B. 12<br>C. 14<br>D. 10​
SOVA2 [1]
I think it is 32, bc the value of x is 20 so your problem would look like this; 2 ( (20) - 4 )
5 0
3 years ago
What is the median score for 7 3 8 4 5 6 9 8 9
bija089 [108]

Answer:

7

Step-by-step explanation:

4 0
3 years ago
A manager at a local company asked his employees how many times they had given blood in the last year. The results of the survey
Lubov Fominskaja [6]

Answer:

Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779

And the deviation would be:

Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54

Step-by-step explanation:

For this case we have the following distribution given:

X        0         1       2       3       4         5        6

P(X)  0.3   0.25   0.2   0.12   0.07   0.04   0.02

For this case we need to find first the expected value given by:

E(X) = \sum_{i=1}^n X_i P(X_I)

And replacing we got:

E(X)= 0*0.3 +1*0.25 +2*0.2 +3*0.12 +4*0.07+ 5*0.04 +6*0.02=1.61

Now we can find the second moment given by:

E(X^2) =\sum_{i=1}^n X^2_i P(X_i)

And replacing we got:

E(X^2)= 0^2*0.3 +1^2*0.25 +2^2*0.2 +3^2*0.12 +4^2*0.07+ 5^2*0.04 +6^2*0.02=4.97

And the variance would be given by:

Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779

And the deviation would be:

Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54

 

8 0
3 years ago
1.The sum of three numbers is twenty. The second number is four times the first and the sum of the first and third is eight. Wha
lesya692 [45]

Answer:

Step-by-step explanation:

4x=12

x=12/4

x=3 answer

y=4*3=12 answer.

z=8-3=5 answer.

proof

3+12+5=20

20=20

5 0
3 years ago
Read 2 more answers
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