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3 years ago

Neeeeeeed HELP NOWWWW !!!!!!!!!!!

Mathematics

1 answer:

velikii [3]3 years ago

5 0

ANSWER:

As the above angles are corresponding, so they must be equal.

So, 17x - 4 = 12 + 5x

17x - 5x = 12 + 4

12x = 16

x = 16/12

x = 4/3.

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3(x-4) = 2(-2x + 1) this is confusing me

nata0808 [166]

Answer:

x = 2

Step-by-step explanation:

Distribute

3 (−4) = 2 (−2+1)

3 − 12 = 2 (-2x +1)

Distrubute again

3x - 12 = -4x + 2

Add twelve to both sides of the equation

Simpfly

3x = -4x + 14

Add 4x to both sides of the equation

simpfly

7x = 14

Divide both sides of the equation by the same term

Simpfly

x = 2

5 0

3 years ago

D=5, a10=48. find a45

arsen [322]

Answer:

223

Step-by-step explanation:

it is an arithmetic sequence and we will use this formula
an = a1+(n-1)d
now first we will find a1
a10= a1+(10-1)d
48= a1 +9×5
after simplify
a1=3
now using again this formula we can easily find a45
a45= 3+(45-1)4=223

7 0

3 years ago

What is the slope of the coordinates (8,1) and (5,-2)

gulaghasi [49]

Answer:

I know this isn't the answer you'd like, but there's a graphing app called ''desmos'' and you can enter the equation in there and it gives you your answer.

Step-by-step explanation:

3 0

3 years ago

The length of a rectangle is units greater than its width. If the width is w, which expression gives the perimeter of the rectan

Illusion [34]

Answer: 2l+2w

Step-by-step explanation:

8 0

3 years ago

5. A scientist believes the concentration of radon gas in the air is greater that the established safe level of 4pci or less. Th

zysi [14]

Complete Question

A scientist believes the concentration of radon gas in the air is greater that the established safe level of 4 pci or less. The scientist tests the composition for 36 days finding an average concentration of 4.4 pci with a sample standard deviation of 1 pci.

a) In testing the scientist's belief, write the appropriate hypotheses:

$H_o:$ Ha:

b) What decision should be made?

Answer:

The null hypothesis is $H_o : \mu \le 4 \ pci$

The alternative hypothesis is $H_a : \mu > 4 \ pci$

There is sufficient evidence to conclude that the concentration of radon gas in the air is greater that the established safe level of 4pci or less

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 4 \ pci$

The sample size $n = 36 \ days$

The sample mean is $\= x = 4.4 \ pci$

The standard deviation is $\sigma = 1 \ pci$

The level of significance is $\alpha = 0.05$

The null hypothesis is $H_o : \mu = 4 \ pci$

The alternative hypothesis is $H_a : \mu > 4 \ pci$

Generally the test statistics is mathematically represented as

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

=> $t = \frac{ 4.4 - 4 }{ \frac{ 1}{ \sqrt{36} } }$

=> $t =2.4$

The p-value is mathematically represented as

$p-value = P(Z > 2.4 )$

From the z-table

$P(Z > 2.4 ) = 0.008$

$p-value =0.008$

So from this obtained value we see that

$p-value < \alpha$ so we reject the null hypothesis

Hence we can conclude that there is sufficient evidence to conclude that the concentration of radon gas in the air is greater that the established safe level of 4pci or less

4 0

3 years ago