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3 years ago

Pls help me also i like mr.bubz

Mathematics

2 answers:

Serggg [28]3 years ago

6 0

you Answer is:

x = − 27

Lemur [1.5K]3 years ago

4 0

Answer: -27

same

Step-by-step explanation:

You might be interested in

Asher pays $156 every 6 weeks for piano lessons. what is the price for per year for piano lesson?

scoundrel [369]

Price for every 6 weeks= $ 156
Price for 1 week = 156/6 = $ 26

Assuming there are approximately 52 weeks in a year
Price for lessons per year = 26*52
= $1352

7 0

3 years ago

668,126,826<br> - 424,102,320

stiv31 [10]

Answer:

244,024,506

Step-by-step explanation:

have a great day :)

3 0

3 years ago

In Pennsylvania the average IQ score is 101.5 The variable is normally distributed and the population standard deviation is know

elena-14-01-66 [18.8K]

Answer:

P-value = 0.0368

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 101.5

Sample mean, $\bar{x}$ = 106.4

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 15

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 101.5\\H_A: \mu> 101.5$

We use One-tailed(right) z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{106.4 - 101.5}{\frac{15}{\sqrt{30}} } = 1.789$

Now, $z_{critical} \text{ at 0.05 level of significance } = 1.64$

Since,

$z_{stat} > z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis. Thus, students in Pennsylvania have an IQ that is significantly greater than the state average.

P-value can be calculated with the standard normal table.

P-value = 0.0368

P-value is lower than the significance level.

4 0

3 years ago

(7x4 + 2x3 - 3) – (4x2 - 9x + 2)

abruzzese [7]

Answer:

7x4+2x3-4x2-5

Step-by-step explanation:

We will start solving this question by opening the bracket first

So let's solve

(7x4+2x3-3)-(4x2-9x+2)

7x4+2x3-3-4x2+9x-2

Collect like terms

7x4+2x3-4x2-3-2

7x4+2x3-4x2-5

So the final answer is 7x4+2x3-4x2-5

4 0

3 years ago

College calculus using integration

Lynna [10]

The midpoint Rule says that the Area can be found by summing up the areas of 'n' rectangles, each with length a/n and height of midpoint width.

a = 170
n = 5
midpoint widths are given as 2nd,4th,6th,8th, 10th intervals.

Area = 34(20.8 + 29+27.4+20.5+9.1)
Area = 3631.2

8 0

3 years ago