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3 years ago

Easy math please help i'll mark brainliest

Mathematics

2 answers:

arlik [135]3 years ago

4 0

i believe these are the answers:

1. b

2. a

Sonja [21]3 years ago

3 0

Answer:

Mark me brainiiest

Step-by-step explanation:

Its 1. B and 2. A

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Examine the diagram of circle V, where two chords, JK and LM, are equidistant from the center. If JK=4x+37, and LM=5(x+5), what

77julia77 [94]

Answer:

x=12

Step-by-step explanation:

we know that

If the two chords are equidistant from the center of the circle, then the chords must be congruent.

JK=LM

substitute the given values

$4x+37=5(x+5)$

solve for x

$5x-4x=37-25\\x=12$

6 0

3 years ago

Find the density of a soda can with a radius of 3.25 cm, a height of 122 cm, and a mass of 40 g.

dimaraw [331]

Answer:

density = $9.88*10^{-3}$ g/cm^3

Step-by-step explanation:

Step 1: Volume of soda can

$volume = \pi r ^{2} h$

=> $\pi 3.25^{2}*122$

volume = 4048.3 $cm^{3}$

Step 2: Using answer from step 1 to calculate density

$density=\frac{mass}{volume}$

density = $\frac{40}{\pi 3.25^{2}*122 }$

density = $9.88*10^{-3}$ g/cm^3

7 0

3 years ago

s defined to be the dollar value of loans defaulted divided by the total dollar value of all loans made. Banking officials claim

Amiraneli [1.4K]

Answer:

The null hypothesis failed to be rejected.

At a significance level of 0.05, there is not enough evidence to support the claim that the mean bad debt ratio for Ohio banks is different than the Midwestern average (3.5%).

Test statistic t = 1.431

Critical values tc = ±2.447

P-value = 0.203

Step-by-step explanation:

This is a hypothesis t-test for the population mean.

The claim is that the mean bad debt ratio for Ohio banks is different than the Midwestern average (3.5%).

Then, the null and alternative hypothesis are:

H_0: \mu=3.5\\\\H_a:\mu\neq 3.5

The significance level is 0.05.

The sample has a size n=7.

We calculate the sample mean and standard deviation as:

$M=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M=\dfrac{1}{7}(7+4+6+3+5+4+2)\\\\\\M=\dfrac{31}{7}\\\\\\M=4.43\\\\\\$

$s=\sqrt{\dfrac{1}{n-1}\sum_{i=1}^n\,(x_i-M)^2}\\\\\\s=\sqrt{\dfrac{1}{6}((7-4.43)^2+(4-4.43)^2+(6-4.43)^2+. . . +(2-4.43)^2)}\\\\\\s=\sqrt{\dfrac{17.71}{6}}\\\\\\s=\sqrt{2.95}=1.72\\\\\\$

The sample mean is M=4.43.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=1.72.

The estimated standard error of the mean is computed using the formula:

$s_M=\dfrac{s}{\sqrt{n}}=\dfrac{1.72}{\sqrt{7}}=0.65$

Then, we can calculate the t-statistic as:

$t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{4.43-3.5}{0.65}=\dfrac{0.93}{0.65}=1.431$

The degrees of freedom for this sample size are:

$df=n-1=7-1=6$

This test is a two-tailed test, with 6 degrees of freedom and t=1.431, so the P-value for this test is calculated as (using a t-table):

$\text{P-value}=2\cdot P(t>1.431)=0.203$

As the P-value (0.203) is bigger than the significance level (0.05), the effect is not significant.

If we use the critical value approach, for this level of confidence, the critical values are tc = ±2.447. The test statistic is within the bounds of the critical values and falls within the acceptance region.

The null hypothesis failed to be rejected.

At a significance level of 0.05, there is not enough evidence to support the claim that the mean bad debt ratio for Ohio banks is different than the Midwestern average (3.5%).

3 0

3 years ago

Select the three ratios that represent the numbers of blue marbles to red marbles, there are 6 blue marbles and 9 red marbles

Agata [3.3K]

Answer:

6:9 or (2:3)

Step-by-step explanation:

A ratio is a term that gives comparison of values. It helps to determine

how much of a particular thing that is compare to other thing.

Given:

numbers of blue marbles= 6

numbers of red marbles= 9

Hence, ratios that represent the numbers of blue marbles to red = 6:9

We can reduce it using factor of 3, hence the ratio becomes(2:3)

8 0

3 years ago

Lee el texto y sustituye las palabras resaltadas por frases adverbiales que expresen temporalidad

Luda [366]

Answer:

............. ahi esta la respuesta

7 0

3 years ago