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3 years ago

D А A 10 ол | 3 сл| - alw

Mathematics

2 answers:

Sever21 [200]3 years ago

5 0

Answer:

1/5 is the answer eeeeeeeeeeeeee

Lera25 [3.4K]3 years ago

3 0

B. 1/5
I’m pretty positive that’s the answer

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It is suspected that calcium in blood platelets may be related to blood pressure. As part of a study of this relationship, resea

mr Goodwill [35]

Answer:

Step-by-step explanation:

The null and the alternative hypothesis are:

$\mathbf{ H_o: \rho = 0} \\ \\ \mathbf{H_1: \rho \ne 0}$

The test statistics is as follows:

$t = \dfrac{r\sqrt{n-2} }{\sqrt{1-r^2}}$

$t = \dfrac{0.4 \sqrt{30-2} }{\sqrt{1-0.4^2}}$

$t = \dfrac{0.4 \sqrt{28} }{\sqrt{0.84}}$

t = 2.3094

The critical value

$t_{\alpha/df} = t_\ \{0.05/2 \ , \ 30-2 \} } \\ \\ = t_{0.025,28} = \pm 2.048 ( from \ the \ t-tables)$

Decision rule:

To reject $H_o$ if t > $t_{\alpha/df}$ .

So since t > $t_{\alpha/df}$ . we reject $H_o$ at ∝ = 0.05

Conclusion: There is sufficient evidence to conclude that blood pressure and patient calcium are linearly related.

3 0

3 years ago

Solve the following system of equations. Express your answer as an ordered

exis [7]

Answer:

I'm not going to give you an exact answer because there could be many different ones

Step-by-step explanation:

The equations can be rewritten as:

2x - 7 = 7y

-4x + 19 = 3y

then you just insert a value for x and get the answer.

8 0

3 years ago

How many terms are in the algebraic expression Negative 7 + 12 x 4 minus 5 y 8 + x?

BARSIC [14]

Answer:

Therefore,

There are Four i.e 4 terms in the expression,

$-7+12x^{4}-5y^{8}+x$

Step-by-step explanation:

Algebraic Expression:

An algebraic expression is a mathematical expression that consists of variables, numbers and operations.

Variables with the coefficient is called as Term.
Number is also a term.

Here the Expression is

$-7+12x^{4}-5y^{8}+x$

So,

$-7 = One\ Term\\12x^{4}=Second\ Term\\-5y^{8}=Third\ Term\\x=Fourth\ Term$

In all there are Four i.e 4 terms in the given expressions.

Therefore,

There are Four i.e 4 terms in the expression,

$-7+12x^{4}-5y^{8}+x$

5 0

4 years ago

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write an equation of a line in slope intercept form That goes through -2,14 and is parallel to y=-6x+2

n200080 [17]

Answer:

make a function table that makes it super easy

Step-by-step explanation:

3 0

4 years ago

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A cyclist estimates that he will bike 80 miles this week. He actually bikes 75.5 miles. What is the percent error of the cyclist

vazorg [7]

Answer:

Step-by-step explanation:

Estimated distance = 80 miles

Actual distance covered = 75.5 miles

We need to find the percent error of the cyclist's estimate. Its formula is given by :

$\%=\dfrac{|\text{actual value-estimated value}|}{\text{actual value}}\times 100$

Put all the values,

$\%=\dfrac{80-75.5}{75.5}\times 100\\\\=5.96\%$

= 6%

So, the percentage error is 6%.

4 0

3 years ago

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