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3 years ago

What is the value of x in the equation 2(3/8x-1)=-3+1/2x

Mathematics

1 answer:

DedPeter [7]3 years ago

5 0

Answer:

The answer is -4

Step-by-step explanation:

If you plug them in set equal to each other in a calculator it tells you please leave brainiest 5 star and thx i really appreciate it

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If one square yard costs 12 dollars how much is 180 square feet

Mumz [18]

12 x 180 is equal to 2160. It would cost $2160

3 0

2 years ago

Read 2 more answers

The number X of days in the summer months that a construction crew cannot work because of the weather has the probability distri

Ronch [10]

Answer:

a.)The probability of losing no more than ten days next summer is

0.65

b.) The probability that 8 - 12 days will be lost next summer is 0.8

c.) The probability there will be no days lost next summer is 0.

Step-by-step explanation:

The probability distribution for the number X of days in the summer that a construction crew cannot work because of the weather is given below:

x P(x)

6 0.03

7 0.08

8 0.15

9 0.2

10 0.19

11 0.16

12 0.1

13 0.07

14 0.02

a.) To find the probability that no more than 10 days will lost next summer can be found by adding the values of probability of the days lost which are 10 days or less, that is to say we can write

p( x ≤ 10 ) = p(x=6) + p(x =7) + p(x=8) + p(x=9) + p(x=10)

= 0.03 + 0.08 + 0.15 + 0.2 + 0.19

= 0.65

b.) To find the probability that 8 to 12 days will be lost next summer will be given by taking into account and adding the probabilities starting form the probability when 8 days are lost to the probability when 12 days are lost

p( 8 ≤ x ≤ 12) = p(x=8) + p(x=9) + p(x=10) + p(x=11) + p(x=12)

= 0.15 + 0.2 + 0.19 + 0.16 + 0.1

= 0.8

c.) The probability that no days will be lost next summer will be given by

= 1 - ( p(x=6) + p(x=7) + p(x=8) + p(x=9) + p(10) + p(11) + p(12))

= 1 - 1

= 0

The probability that will be no days lost next summer is zero. We can conclude that there will be some days lost next summer.

4 0

2 years ago

8 times the difference between b and 4 in a variable expression

Zinaida [17]

Answer:

8( b - 4 )

Step-by-step explanation:

8 x ( b - 4 )

8( b - 4 )

I hope this helps!

6 0

2 years ago

Read 2 more answers

In one week, Jenny workers a total of 22 hours at a movie theater and a car wash. Jenny earned $8.50 per hour at the movie theat

MariettaO [177]

Answer:

10 hours

Step-by-step explanation:

12 hours theater = $96.00

10 hours car wash = $85.00

total = 22hours = $181.00

6 0

2 years ago

The Westbrook Pharmaceutical Company manufactures atorvastatin pills, designed to lower cholesterol levels. Listed below are the

Sloan [31]

Solution :

Given :

$\mu = 24$

n = 15

$\overline x = 24.89$

s = 0.5902

The hypothesis :

$H_0 : \mu = 25$

$H_a : \mu \neq 25$

This is a 2 tailed test.

The significance level is $95 \% \ ( \alpha =0.05)$

The test statistic :

$Z=\frac{\overline x - \mu}{\frac{\sigma}{\sqrt n}}$

$Z=\frac{24.89-25}{\frac{0.5902}{\sqrt 15}}$

= -0.72

The p value : The p value for Z = -0.72 is 0.4716

The critical value : the critical value at α = 0.05 is +1.96 to -1.96

The decision rule :

If $Z_{observed} > Z_{critical}$ or if $Z_{observed} < -Z_{critical}$ , then reject $H_0$ .

Also if p value is less than α, then reject $H_0$ .

The decision :

Since the Z falls in between +1.96 and -1.96, we fail to reject the $H_0$ . Also since p value is greater than α, we fail to reject $H_0$ .

The conclusion :

There is not sufficient evidence at the 95% significance level to warrant rejection of the claim that the pills come from a population in which the amount of the atorvastatin is equal to 25 mg.

Now calculating the mean and the standard deviation :

$\text{Mean} = \frac{\text{sum of observation}}{\text{total observations}}$