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3 years ago

Josiah paid $19.75 for 2.5 pounds of coffee beans. What was the cost of the beans per pounds?

2 answers:

8 0

To do this, use proportions. You get:

$\frac{19.75}{2.5} = \frac{x}{1}$

So all you have to do is divide 19.75 by 2.5 and you get $7.90

Olin [163]3 years ago

5 0

19.75 / 2.5 = 7.90 per lb

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Novosadov [1.4K]

Answer:

1. ≈37.7

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3. ≈69.12

4. ≈31.42

5. =17.6

6. =48

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8. =8

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11. ≈71.63

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3 years ago

Please help me!!!!!!!!!

kiruha [24]

Answer:

Step-by-step explanation:

Using the equation of line

y - y_1 = m(x - x_1)

y = mx + C

First first the slope of the equation

y = 9x - 4

Note: if two lines are perpendicular, their slope will be negative reciprocal

Slope = 9, but because it is perpendicular

m = -1/9

Using the equation

y - y_1 = m(x - x_1)

With the point (-9,-17)

x_1 = -9

y_1 = -17

y - (-17) = -1/9(x - (-9)

y + 17 = -1/9(x + 9)

y = -1/9(x + 9) - 17

Open the bracket.

y = (-x -9)/9 - 17

Lcm is 9

y = -x -9 - 153 / 9

y = -x - 162 / 9

Let's separate

y = -x/9 - 162/9

y = -x/9 - 18

y = -1/9x - 18

Therefore, the equation of the line is y = -1/9x - 18

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3 years ago

Question 30 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

vovikov84 [41]

Answer:

So it by its formula you can solve it bye

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2 years ago

4. If the number of degrees in the measure of one angle of a triangle is represented by 4x and the measure of a second

Gnom [1K]

Answer:

$third \: angle \: = 180 \degree - (4x + y) \degree$

Step-by-step explanation:

$4x \degree + y \degree + third \: angle \: = 180 \degree \\ \\ third \: angle \: = 180 \degree - (4x + y) \degree \\ \\$

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3 years ago

Location is known to affect the number, of a particular item, sold by HEB Pantry. Two different locations, A and B, are selected

12345 [234]

Answer:

d) [-16.03,-3.97]

$-16.03 \leq \mu_A -\mu_B \leq -3.97$ .

Step-by-step explanation:

Notation and previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$n_A=18$ represent the sample of A

$n_B =13$ represent the sample of B

$\bar x_A =39$ represent the mean sample for A

$\bar x_B =49$ represent the mean sample for B

$s_A =8$ represent the sample deviation for A

$s_B =4$ represent the sample deviation for B

$\alpha=0.01$ represent the significance level

Confidence =99% or 0.99

The confidence interval for the difference of means is given by the following formula:

$(\bar X_A -\bar X_B) \pm t_{\alpha/2}\sqrt{(\frac{s^2_A}{n_A}+\frac{s^2_B}{n_B})}$ (1)

The point of estimate for $\mu_A -\mu_B$ is just given by:

$\bar X_A -\bar X_B =39-49=-10$

The appropiate degrees of freedom are $df=n_1+ n_2 -2=18+13-2=29$

Since the Confidence is 0.99 or 99%, the value of $\alpha=0.01$ and $\alpha/2 =0.005$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.005,29)".And we see that $t_{\alpha/2}=2.756$