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2 years ago

What is 13 nickels combined with 6 dimes?

2 answers:

7 0

1 nickel = 5 cents

1 dime = 10 cents

13 nickels = 13 *5 = 65 cents

6 dimes = 6*10 = 60 cents.

Total = 65 + 60 = 125 cents.

= 125 cents or $1.25

mylen [45]2 years ago

5 0

you need to multiply 5 and 13 and add it to 6 multiplied to 10 which is 125

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Write 6.384 to 1 decimal place

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Answer:

6.384 rounded to one decimal place is 6.4

Step-by-step explanation:

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2 years ago

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Write an equation, in slope-intercept form, to model each situation. You rent a bicycle for $20 plus $2 per hour.

Leona [35]

Y=2x+20 x represents hours

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2 years ago

Tensile-strength tests were carried out on two different grades of wire rod. Grade 1 has 10 observations yielding a sample mean

LuckyWell [14K]

Answer:

$t = \frac{1085-1034}{\sqrt{\frac{52^2}{10} +\frac{61^2}{15}}} = 2.240$

$df = n_1 +n_2 -2 = 10+15-2= 23$

$p_v = 2*P(t_{23} >2.240) = 0.035$

Since the p value is lower than the significance level we have enough evidence to conclude that the true means are different at 5% of significance

Step-by-step explanation:

Data given

$\bar X_1 = 1085$ sample mean for group 1

$\bar X_2 = 1034$ sample mean for group 2

$n_1 = 10$ sample size for group 1

$n_2 = 15$ sample size for group 2

$s_1 = 52$ sample deviation for group 1

$s_2 = 61$ sample deviation for group 2

Solution

We want to check if the two means are equal so then the system of hypothesis are:

Null hypothesis: $\mu_1= \mu_2$

Alternative hypothesis: $\mu_1 \neq \mu_2$

And the statistic is given by:

$t = \frac{\bar X_1 -\bar X_2}{\sqrt{\frac{s^2_1}{n_1}+\frac{s^2_2}{n_2}}}$

And replacing we got:

$t = \frac{1085-1034}{\sqrt{\frac{52^2}{10} +\frac{61^2}{15}}} = 2.240$

The degrees of freedom are given by:

$df = n_1 +n_2 -2 = 10+15-2= 23$

And the p value would be:

$p_v = 2*P(t_{23} >2.240) = 0.035$

Since the p value is lower than the significance level we have enough evidence to conclude that the true means are different at 5% of significance

8 0

2 years ago

20points!!!! 3 2/3 + 2.3 =

Slav-nsk [51]

5.96666 or 6 because if you round it that’s what it’ll be

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2 years ago

What figure is a dilation of Figure A by a factor of 12 ?

avanturin [10]

Answer:

Choose the figure with side lengths 0.5, 1, 2 and 2.5

Step-by-step explanation:

Similar figures are figures which have the same shape but not the same size. This means their angle measures are equal but their side lengths are not instead they are proportional. They are related by a scale factor. To find the new side lengths of the figure multiply the original side lengths by 1/2.

The sides are 1, 2, 4, and 5.

They become:

1*1/2 = 0.5

2*1/2 = 1

4*1/2 = 2

5*1/2 = 2.5

Choose the figure with these distances.

6 0

2 years ago