1. A crash repair bill comes to $1380.00. How much is 10% of

the bill? What is the final bill once 10% is taken off?


2. A person buys a new fan belt, a new alternator, and a new water pump for their car. The total comes to $170.50. What is 20% of the total? How much is the final total once the 20% is taken off?

Answer:

2.53

Step-by-step explanation:

Answer:

This problem is same as finding the least common multiple (LCM) of 3 and 4.

3 = 3

4 = 2 x 2

=> LCM = 3 x 2^2 = 12 (3 appears once, 2 appears twice)

=> After 12 hours, two bell P and Q ring simultaneously.

Hope this helps!

:)

Answer:

Step-by-step explanation:

Let's solve your equation step-by-step.

x2+4=3x+8

Step 1: Subtract 3x+8 from both sides.

x2+4−(3x+8)=3x+8−(3x+8)

x2−3x−4=0

Step 2: Factor left side of equation.

(x+1)(x−4)=0

Step 3: Set factors equal to 0.

x+1=0 or x−4=0

x=−1 or x=4

Answer:

x=−1 or x=4

Answer:

  8

Step-by-step explanation:

The fact that DE is perpendicular to AC means triangles AED and CED are congruent and side AD is equal in length to side CD.

  5x -20 = 2x +4

  3x = 24 . . . . . . . add 20-2x

  x = 8 . . . . . . . . . .divide by 3

The value of x is 8.

Answer:

Step-by-step explanation:

2x + 2y = -2

3x - 2y = 12

5x = 10

x = 2

2(2) + 2y = -2

4 + 2y = -2

2y = -6

y = -3

(2, -3)

Answer:

  about 2357 years

Step-by-step explanation:

You want to find t such that ...

  0.79 = e^(-.0001t)

Taking natural logs, we get ...

  ln(0.79) = 0.0001t

  ln(0.79)/-0.0001 = t = 2357 . . . years

Answer:

See image

Step-by-step explanation:

Answer:

270cm^2

Step-by-step explanation:

The side length is irrelevant and does not matter.

The area of a triangle is found by multiplying the base by the height and then dividing that by two.

For this problem it would be...

30*18=540

540/2=270

So the area would be 270cm^2

Answer:

270

Step-by-step explanation:

In order to wipe out the whole job, it takes

(9 persons) x (8 hours/day) x (25 days)  =  1,800 person-hours .

12 workers working for 15 days will accomplish

(12 persons) x (H hours/day) x (15 days)  =  180H person-hours  of work.

180H person-hours  =  1,800 person-hours

H = 10

The 12-person team must work 10 hours/day to make this scheme all work out.  

What'll really happen:  

-- In order to keep tabs on the project and make sure it gets done on the accelerated schedule, the managers in Chicago in suits will assign the supervisor to complete the project in 14 days instead of 15, and they'll require him to send them a status report twice each day.

-- After completing and emailing the Noon status report each day, the supervisor will put on his hard-hat and PPE, and head out to work alongside the 12 sweating workers, who will all begin to sag when they pass 9 hours each day.

-- Day #12 will be solid torrential rain, and no progress will be possible.  The men will want to get some rest, but Chicago will call a Zoom meeting to deliver a motivational pep-talk. Attendance will be mandatory.

-- Days #13 and #14 will stretch to 12 hours, but the project will finish in the allotted 14 days.

-- On Day #15, in Chicago, the customer will treat the managers to a fine dinner, drinks, and a Bulls game, in appreciation for completing the project in 15 days.  In the field, the supervisor and the 12 workers will get to sleep in for a whole hour later than usual, before they clean up the job site and begin the long drive home.

(Been there. Done that.)

Answer:

the slope is either -2/1 or -1/2

Step-by-step explanation:

hope this helped sorry i didnt know the y intercept but i think its 0

Answer:

98

Step-by-step explanation:

Multiply.38*280

Answer:

98

Step-by-step explanation:

To find the answer I multiplied 280 by 0.35, that is how you can quickly find a percentage. For example if you would like to find what is 7% of 280 you can just multiply it by 0.07.

Answer:Stephen

Step-by-step explanation:Just did it on edge

Answer:

Steve

Step-by-step explanation:

Answer:

80

Step-by-step explanation:

Since 2 and 8 are factors of 16, you only need to find a multiple of 16 in between 67 and 133 which is simple. I chose 80.

Answer:

128

Step-by-step explanation:

It's asking you to find a number between 67 and 133 that you could divide by 2, 8 and 16 and won't get a remainder.

128 can be divided by 2, 8 and 16 without a remainder.

Answer:

Null hypothesis: [tex] \mu \geq 60[/tex]

Alternative hypothesis: [tex] \mu <60[/tex]

Since the sample size is large enough we can assume that the distribution for the statistic is normal so then in order to find the critical value for this test taking in count the significance level given of 0.05 we need to look in the normal standard distribution a value who accumulates 0.05 of the area in the left and would be:

[tex] z_{crit}= -1.64[/tex]

Step-by-step explanation:

For this case we have the following data given:

[tex] \bar X = 53[/tex] represent the sample mean

[tex] s = 23[/tex] represent the sample deviation

[tex]n = 10000[/tex] represent the sample size.

We want to test for this case if the true mean is less than 60 so then the system of hypothesis are:

Null hypothesis: [tex] \mu \geq 60[/tex]

Alternative hypothesis: [tex] \mu <60[/tex]

Since the sample size is large enough we can assume that the distribution for the statistic is normal so then in order to find the critical value for this test taking in count the significance level given of 0.05 we need to look in the normal standard distribution a value who accumulates 0.05 of the area in the left and would be:

[tex] z_{crit}= -1.64[/tex]

Answer:

Its -i on edge

Step-by-step explanation:

Answer: The paper going to cost $16.31 for those reports.

Step-by-step explanation:

Given, the length of a long year-end status report for work = 144

If we ned to print  16 copies for a meeting next week, the total number of pages required = 16 *144

= 2304

Since, the paper is sold in reams of 500 pages = $3.54

Then, cost of one page = (Cost of a ream of 500 pages) ÷ 500

= $3.54 ÷ 500

=  $ 0.00708

Cost of  total number of pages required  = 2304x (cost of one page)

= 2304 x ($ 0.00708)

= $ 16.31232 ≈ $16.31

Hence, the paper going to cost $16.31 for those reports.

Answer:

In a typical kite as shown in picture, it is symmetric around PQ and PQ is perpendicular with RN.

=> Two right triangles PNT and PRT are congruent.

=> angle PRT = angle PNT = 34 deg

=> angle RPT = 90 - angle PRT = 90 - 34 = 56 deg

=> Option A is correct.

Hope this helps!

:)

Answer:

  {6-√21, 6+√21}

Step-by-step explanation:

It usually works well to put the x-terms on one side of the equal sign. Then add the square of half the x-term coefficient.

  x^2 -12x = -15 . . . . . . subtract 12x

The x-term coefficient is -12, so the square of half that is (-12/2)^2 = 36. Adding 36, we have ...

  x^2 -12x +36 = -15 +36

  (x -6)^2 = 21

  x -6 = ±√21 . . . . . take the square root

  x = 6 ±√21 . . . . . add 6

The solution set is ...

  {6-√21, 6+√21}

Answer:

976

Step-by-step explanation:

triangle= 1/2(24)14 times 2

square or rectangle= 10(14), 10(25), 10 (25)

Answer:

d. Yes, there appears to be a linear trend, but the fit is not exact.

Step-by-step explanation:

Use the chain rule:

[tex]y=\ln(\sin(3x))[/tex]

[tex]y'=(\ln(\sin(3x)))'[/tex]

[tex]y'=\dfrac{(\sin(3x))'}{\sin(3x)}[/tex]

[tex]y'=\dfrac{\cos(3x)(3x)'}{\sin(3x)}[/tex]

[tex]y'=\dfrac{3\cos(3x)}{\sin(3x)}[/tex]

[tex]y'=3\cot(3x)[/tex]

Answer:

= 4.32 × 10^6

(scientific notation)

= 4.32e6

(scientific e notation)

= 4.32 × 10^6

(engineering notation)

(million; prefix mega- (M))

= 4320000

(real number)

Hence number using scientific notation is 4.32*[tex]10^{6}[/tex]

When a number between 1 and 10 is multiplied by a power of 10, it is written in scientific notation. 650,000,000, for example, can be expressed as 6.5 108 in scientific notation. Sal Khan and the CK-12 Foundation collaborated on this project.

Given   4,320,000 which can be broken in 432*10000

Which can be written as 432*[tex]10^{4}[/tex]

432 can be written as 4.32*100*[tex]10^{4}[/tex]=4.32*[tex]10^{6}[/tex]

Hence number using scientific notation is 4.32*[tex]10^{6}[/tex]

Learn more about scientific notationhttps://brainly.com/question/1767229

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Answer:

120

Step-by-step explanation:

Answer:

1 gal 9 qt

Step-by-step explanation:

Answer:

1.75 US Gallons

Step-by-step explanation:

(3 gal 2 qt) - (1 gal 3 qt) =

1.75 US gallons

Answer:

A (1/7)

Step-by-step explanation:The square root goes into 1 and 49 turning them into 1 and 7, which means it's a real number and u get A.

Answer:

1/7

Step-by-step explanation:

If you multiply 1/7 by 1/7 you get 1/49. That is why it is the square root.

Answer:

g(x), f(x), h(x)

Step-by-step explanation:

The required functions sequence are -x³, -x² and -|x|.

Three functions in order from the fastest decreasing average rate of change to the slowest decreasing average rate of change on the interval [0, 3].

Rate of change is defined as the change in value with rest to the time is called rate of change.

Question seems to be incomplete, we assumed three functions -x³, -x² and -|x|.
Now, the function has fastest decreasing average rate of change is  -x³
and the function has slowest decreasing average rate of change is  -|x| on the interval [0, 3]. While plotting on graph.

Thus, the required functions sequence are -x³, -x² and -|x|.

Learn more about rate of change here: https://brainly.com/question/13103052

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Answer:

11 ft

Step-by-step explanation:

Given the two lengths of a triangle as

AB = 6ft

AC = 6ft

This is an isosceles triangle because only 2 sides are equal.

In an isosceles triangle, the sum of 2 (sides) lengths must be greater than the other length.

Therefore, let's assume the following:

i) AC + AB > BC

6 + 6 > BC

12 > BC (BC is less than 12)

BC < 12

ii) BC + AC > AB

BC + 6 > 6

BC > 6 - 6

BC > 0

Therefore the range of values for BC =

0 < BC < 12

Since BC must be bigger than one of the lengths and it must also be less than the sum of the 2 sides. The length of BC could be 11 because it is less than (6+6) 12 and greater than 6.

Answer:11:)

Step-by-step explanation:

Answer:

[tex] p(O)=\frac{8}{18}=\frac{4}{9}[/tex]

And since we want the complement of choosing an orange juice box the answer would be:

[tex] P(O') =1 - P(O) = 1-\frac{4}{9}= \frac{5}{9}[/tex]

And the nest answer for this case is:

5/9

Step-by-step explanation:

For this case we know that we have 4 apple juice boxes, 8 orange juice boxes, and 6 fruit punch juice boxes, so then the size of the sample space is:

[tex] 8+4+6= 18[/tex]

Then we can find the probability of selecting an orange juice box with the definition of Laplace given by:

[tex] p =\frac{possible}{total}[/tex]

And for this case the possible cases are 4 and the total 18 so then the probability is given by:

[tex] p(O)=\frac{8}{18}=\frac{4}{9}[/tex]

And since we want the complement of choosing an orange juice box the answer would be:

[tex] P(O') =1 - P(O) = 1-\frac{4}{9}= \frac{5}{9}[/tex]

And the nest answer for this case is:

5/9

Answer:

x×x-5x-6

x × -4X - 6

Step-by-step explanation:

x×x-5x-6

x × -4X - 6

Answer:

We conclude that there is difference in the proportion of deaths between the 2 groups.

Step-by-step explanation:

We are given that among 2823 drivers not wearing seat belts, 31 died as a result of injuries, and among 7765 drivers wearing seat belts 16 were killed.

Let [tex]p_1[/tex] = proportion of deaths when drivers were not wearing seat belts.

[tex]p_2[/tex] = proportion of deaths when drivers were wearing seat belts.

So, Null Hypothesis, [tex]H_0[/tex] : [tex]p_1=p_2[/tex]      {means that there is no difference in the proportion of deaths between the 2 groups}

Alternate Hypothesis, [tex]H_A[/tex] : [tex]p_1\neq p_2[/tex]     {means that there is difference in the proportion of deaths between the 2 groups}

The test statistics that would be used here Two-sample z test for proportions;

                          T.S. =  [tex]\frac{(\hat p_1-\hat p_2)-(p_1-p_2)}{\sqrt{\frac{\hat p_1(1-\hat p_1)}{n_1}+\frac{\hat p_2(1-\hat p_2)}{n_2} } }[/tex]  ~ N(0,1)

where, [tex]\hat p_1[/tex] = sample proportion of deaths when drivers were not wearing seat belts = [tex]\frac{31}{2823}[/tex] = 0.011

[tex]\hat p_2[/tex] = sample proportion of deaths when drivers were wearing seat belts = [tex]\frac{16}{7765}[/tex] = 0.002

[tex]n_1[/tex] = sample of drivers not wearing seat belts = 2823

[tex]n_2[/tex] = sample of drivers wearing seat belts = 7765

So, the test statistics  =  [tex]\frac{(0.011-0.002)-(0)}{\sqrt{\frac{0.011(1-0.011)}{2823}+\frac{0.002(1-0.002)}{7765} } }[/tex]

                                       =  4.438

The value of z test statistics is 4.438.

Now, at 5% significance level the z table gives critical values of -1.96 and 1.96 for two-tailed test.

Since our test statistic doesn't lie within the range of critical values of z, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that there is difference in the proportion of deaths between the 2 groups.

Also, Margin of error (E) =  [tex]1.96 \times \sqrt{\frac{\hat p_1(1-\hat p_1)}{n_1}+\frac{\hat p_2(1-\hat p_2)}{n_2} }[/tex]

                                        =  [tex]1.96 \times \sqrt{\frac{0.011(1-0.011)}{2823}+\frac{0.002(1-0.002)}{7765} }[/tex]

                                        =  0.00397