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3 years ago

A sale on dog food that cost $10 a bag says buy 1, get one 1/2 off. What is the true percent discount on the dog food?

1 answer:

8 0

Cost to buy one = $ 10
Cost to buy two without discount = $ 20
Cost to buy two with the discount = 10 + (1/2 *10) = 15

True percent discount on the dog food = 5/20 x 100 % = 25 %

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If A:B = 5:18 and B:C = 6:4, form the ratio A:B:C

valina [46]

Answer:

5 : 18 : 12

Step-by-step explanation:

Express the ratio B : C in fractional form, that is

$\frac{B}{C}$ = $\frac{6}{4}$ ( cross- multiply )

6C = 4B ( divide both sides by 6 )

C = $\frac{4}{6}$ B = $\frac{2}{3}$ B , then

C = $\frac{2}{3}$ × 18 = 2 × 6 = 12

Hence

A : B : C = 5 : 18 : 12

8 0

3 years ago

Read 2 more answers

Which expression is equivalent to 6 + 3 * 4 - 1 / 3

Step2247 [10]

Answer:

12 2/3

Step-by-step explanation:

add the integers to get 6+3 + 4 = 13

Now subtract 1/3

13 = 12 + 1 - 1/3

but one is equal to 3/3

12 + 3/3 - 1/3

12 2/3

3 0

3 years ago

10. A small plane was scheduled to fly from Atlanta to Washington, D.C. The plane flies at a constant speed of 230 miles per

MatroZZZ [7]

Answer: The plane had traveled about 264 miles before turning back. The average speed was 230 mph

Step-by-step explanation: 230 - 10 = 220 speed outgoing

230+10 = 240 speed returning

Average speed (220+240)÷2= 460/2 =230 mph (needless to calculate!) Multiplied by total time 2.3 hours = 529 miles total distance.

Traveling the entire distance at 220mph would take about 2.4 hours. Traveling the entire distance at 240mph would take about 2.2 hours, a difference of .20 hours. Cut those times in half:

Traveling at 220mph for 1.2 hours would cover about 264 miles.

Traveling at 240mph for 1.1 hours would cover about 264 miles.

It adds up to 528 miles. The plane can't turn instantly, so figure the turn took the missing mile!

7 0

3 years ago

23 please help thanks no link or i will report

NARA [144]

how many students got 90 or less = 14

how many students got more than 90 = 11

3 more students got 90 or less so answers is D. 3

please mark brainliest

4 0

3 years ago

The scheduled arrival time for a daily flight from Boston to New York is 9:35 am. Historical data show that the arrival time fol

Lady_Fox [76]

Answer:

The mean is 11.5 minutes and the standard deviation is of 6.64 minutes

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The mean is:

$M = \frac{a+b}{2}$

The standard deviation is:

$S = \sqrt{\frac{(b-a)^{2}}{12}}$

Arrival time of 9:18 am and a late arrival time of 9:41 am.

9:41 is 23 minutes from 9:18. So the time is uniformily distributed between 0 and 23 minutes, so a = 0, b = 23.

Mean:

$M = \frac{a+b}{2} = \frac{0+23}{2} = 11.5$

Standard deviation:

$S = \sqrt{\frac{(b-a)^{2}}{12}} = \sqrt{\frac{(23 - 0)^{2}}{12}} = 6.64$

The mean is 11.5 minutes and the standard deviation is of 6.64 minutes

8 0

3 years ago