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Delicious77 [7]
3 years ago
12

10 points 2 questions best one get brainliest

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
8 0

Answer:

9a. GCF: 16. LCM: 960

9b. GCF: 55. LCM: 275

9c. GCF: 24. LCM: 114

9d. GCF: 40. LCM: 600

10a. GCF: 120. LCM: 1440

10b. 10, 2, 5, 20

10c. 2880, 4320, 5760, 7200

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Two ride-sharing companies are competing for business in a large city. To help customers compare the companies, a data scientist
Solnce55 [7]

Solution :

Given :

$n_1 = n_2 = 40$

$\overline X_1 = 18$

$S_1 = 4$

$\overline X_2 = 12$

$S_2 =10$

So we want to test :

$H_0 : \mu_1=\mu_2 $   vs $H_1 : \mu_1 \neq \mu_2 $

a). For 98% confidence interval :

$=\left((\overline X_1 - \overline X_2) \pm Tn_1+n_2-2, \alpha / 2 \sqrt{\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}}\right)$

$=\left((18-12) \pm 2.375 \sqrt{\frac{4^2}{40}+\frac{10^2}{40}}\right)$

$=(6 \pm 4.0445)$

= (1.956, 10.045)

7 0
3 years ago
The perimeter of an equilateral triangle with a side of 6 inches is
DanielleElmas [232]
6+6+6= 18 inches hope it helps
3 0
3 years ago
Read 2 more answers
Find the amount and present value of 10 quarterly payments of $ 1500, if the interest rate is 25% compounded each month.
BlackZzzverrR [31]

Given Information:

Monthly payment = MP = $1500/4 = $375

Monthly interest rate = r = 25/12 = 2.083%

Required Information:

Present Value = ?

Answer:

PV = \$10,110

Explanation:

n = 10*4

n = 40 monthly payments

The present value is found by

$ PV = MP \times  \frac{ (1 - \frac{1}{(1+r)^n} )}{r}  $

Where r is monthly interest rate.

MP is the monthly payment.

$ PV = 375 \times  \frac{ (1 - \frac{1}{(1+0.02083)^{40}} )}{0.02083}  $

PV = 375 \times (26.96)

PV = \$10,110

Therefore, $10,110 is the present value of 10 quarterly payments of $1500 each at 25% interest rate compounded each month.

7 0
4 years ago
A pair of linear equations is shown below:
prisoha [69]

Answer:

C. Graph the first equation, which has slope = −2 and y-intercept = 3, graph the second equation, which has slope = −4 and y-intercept = −1, and find the point of intersection of the two lines.

Step-by-step explanation:

The two equations are in slope intercept form which is y = mx + b where m is the slope and b is the y-intercept.

In the first equation (y = -2x + 3), -2 is the slope since it is the coefficient. "b" is 3 since it is the constant of the equation.

In the second equation (y = -4x -1), -4 is the slope is the coefficient, and the y-intercept is -1 since it is the constant.

To solve the equations graphically, graph them and find the point where they intersect.

4 0
3 years ago
Find the measure of each<br>exterior angle of regular polygonof a 9sides.<br>​
Ronch [10]

Answer:

40

Step-by-step explanation:

Any regular polygon has exterior angles  = to 360 / number of sides.

so a 9-gon has 9 sides. The exterior angle = 360 / 9 = 40

Each exterior angle will be 40 degrees.

Try it with simpler n-gons. A triangle has 3 sides. The exterior angle is 360 / 3 = 120

A square has 4 sides. Each exterior angle is 360 / 4 = 90

5 0
3 years ago
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