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12345 [234]
3 years ago
11

Wilton drives a taxicab. He charges $40 per hour. On Tuesday, Wilton earned $30 in tips while driving customers around for the d

ay. (a) What is the unknown information in the scenario? How will you represent this in a math expression?
If you give a vaild answer and Show your work i'll give you brainiest and Best answer.
Mathematics
1 answer:
Sladkaya [172]3 years ago
3 0
It is not known how many hours were worked or the total

t=40h+30

t= total
h= hours
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Write the equation of the line perpendicular to y= 2/5x+6/6 that passes through the point (-2,6)
Oliga [24]
The line to find: y = mx + b
the line perpendicular to y= 2/5x+6/6 so it has the slope m × 2/5 = -1
thus the slope m = -5/2
the line passes through the point (-2,6) so:
6 = (-5/2)×(-2) + b so b = 1


the equation of the line is y = -5/2x +1
3 0
3 years ago
A field researcher is gathering data on the trunk diameters of mature pine and spruce trees in a certain area. The following are
lidiya [134]

Answer:

As the pvalue of the test is 0.02097 < 0.1, using a .10 significance level, he can conclude that the average trunk diameter of a pine tree is greater than the average diameter of a spruce tree.

Step-by-step explanation:

Using a .10 significance level, can he conclude that the average trunk diameter of a pine tree is greater than the average diameter of a spruce tree

The null hypothesis is that they are equal(that is, subtraction between the means is 0), while the alternate hypothesis is that they are greater(that is, subtraction between the means is larger than 0). So

H_0: \mu_1 - \mu_2 = 0

H_a: \mu_1 - \mu_2 > 0

In which \mu_1 is the mean pine trees height while \mu_2 is the mean spruce trees height.

The test statistic is:

z = \frac{X - \mu}{s}

In which X is the sample mean, \mu is the value tested at the null hypothesis and s is the standard error.

0 is tested at the null hypothesis:

This means that \mu = 0

Mean trunk diameter (cm) 35 30:

Pine trees - 35

Spruce trees - 30

The sample mean is given by the subtraction of the means. So

X = 35 - 30 = 5

Sample Size 40 80

Population variance 160 160

This means that the standard error for each sample is given by:

s_1 = \frac{\sqrt{160}}{\sqrt{40}} = 2

s_1 = \frac{\sqrt{160}}{\sqrt{80}} = \sqrt{2}

The standard error of the difference is the square root of the sum squared of the standard error of each sample.

s = \sqrt{2^2 + (\sqrt{2})^2} = \sqrt{6} = 2.4495

Test statistic:

z = \frac{X - \mu}{s}

z = \frac{5 - 0}{2.4495}

z = 2.04

Pvalue of the test:

Probability of a sample mean larger than 5, which is 1 subtracted by the pvalue of Z when X = 5.

Looking at the z-table, z = 2.04 has a pvalue of 0.9793.

1 - 0.9793 = 0.0207

As the pvalue of the test is 0.02097 < 0.1, using a .10 significance level, he can conclude that the average trunk diameter of a pine tree is greater than the average diameter of a spruce tree.

8 0
3 years ago
The volume of a cube is 1, 953.125 centimeters cubed. Find the length of the sides. Round to the nearest tenth.
Shtirlitz [24]
1953.13 is the length of the sided
6 0
3 years ago
Answers this pls PLS PLS PLS I NEED HELP
raketka [301]
3+4=7
7 x 8=56
There will be 56 airplanes :)Hope this helped!
3 0
3 years ago
Read 2 more answers
Is 3/6 14/28 16/32 17/34 a proportional relationship
NNADVOKAT [17]

Answer:

Not proportional

Step-by-step explanation:

3/6=1/3

14/28=1/2

16/32=1/3

17/34

7 0
3 years ago
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