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Dima020 [189]
3 years ago
8

PLEASE HURRRY!!!

Mathematics
2 answers:
qaws [65]3 years ago
5 0

Answer:

3- 6 hours

4- 41 lbs

5- 53 dogs

Step-by-step explanation:

3. 480/24= 20  

20= miles per hour

6 hours to travel 120 miles

4. 135/62= 2.18

2.18= cost of tomato per pound

90/2.18= 41.28 lbs or 41 lbs

3. 3/5=32/x

cross multiply

3x=160

divide both sides by 3

x=53.3 or 53

ziro4ka [17]3 years ago
5 0

Answer:

3. 6 hours

4. 70 tomatoes

5. 53 cats

Step-by-step explanation:

Find the unit value of the units and then divide them by the other numbers. Sorry this explanation isn't good. I need to run.

You might be interested in
What is the slope between the points (-5 7) and (4 -8)?
german

Answer:

15/-9

Step-by-step explanation:

y2-y1/x2-X1

7-(-8) 15

-5-4. -9

4 0
3 years ago
Evelyn wants to estimate the percentage of people who own a tablet computer she surveys 150 indvidals and finds that 120 own a t
igomit [66]

Answer:

The 99% confidence interval for the percentage of people who own a tablet computer is between 71.59% and 88.41%

Step-by-step explanation:

Confidence interval for the proportion of people who own a tablet:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 150, \pi = \frac{120}{150} = 0.8

99% confidence level

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.576.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.8 - 2.575\sqrt{\frac{0.8*0.2}{150}} = 0.7159

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.8 + 2.575\sqrt{\frac{0.8*0.2}{150}} = 0.8841

Percentage:

Multiply the proportion by 100.

0.7159*100 = 71.59%

0.8841*100 = 88.41%

The 99% confidence interval for the percentage of people who own a tablet computer is between 71.59% and 88.41%

8 0
3 years ago
Jake rides his bicycle 6 miles in 3/5
serg [7]

Answer:

30 miles

Step-by-step explanation:

Alr so-

You want first divide 3 by 3/5 since well- the question asks how many does he ride in 3 hours

Of course, you'll get the answer 5

Now you want to grab the 6 miles Jake could ride in 3/5 hours and put it in a new equation.

(you'll also want to take the 5 you got from the last equation)

You want to multiply both 6 and 5 which is 30

BOOM!

IN CONCLUSION-

the answer is 30 miles

4 0
3 years ago
6. Multiply: i) 3x (5x+8y)
Stella [2.4K]

Answer:

Step-by-step explanation:

3x(5x+8y)=15x^2+24xy

4x(3x^2+5x-7)=12x^3+20x^2-28x

(3x+4y)(2x-7y)=6x^2+8xy-21xy-28y^2=6x^2-13xy-28y^2

(2-3a)(2a^2-3a+7)=4a^2-6a+14-6a^3+9a^2-21a=-6a^3+13a^2-27a+14

4 0
2 years ago
A proposed new ride at Disneyland is a Ferris wheel that goes partially undergrand. A preliminary design idea is for the passeng
Drupady [299]

Height above ground (in feet) = 10 [ 1 - 3 cos (9t degrees) ]

't' is the time, in seconds, after you sit down and the wheel starts turning.


7 0
3 years ago
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