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3 years ago

Find the percent of discount (Just type in the number). $55 on sale for $46.75

Mathematics

1 answer:

Rom4ik [11]3 years ago

7 0

Answer:

15%

Step-by-step explanation:

Given,

Original price = $55.00

Discounted price = $46.75

Discount = $55.00 - $46.75 = $8.25

Percent Discount = (Discount / Original price) x 100%

= (8.25 / 55.00) x 100%

= 0.15 x 100%

= 15%

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While watching a circus show, I counted out the number of acrobats and elephants. I counted 40 legs and 15 heads. How many acrob

Goryan [66]

Answer:

y=10 ( number of acrobat)

Step-by-step explanation:

let x be the elephant and y the acrobat

elephant has 4 legs and acrobat 2

4x+2y=40

x+y=15 ⇒x=15-y

substitute for x in the equation:

4(15-y)+2y=40

60-4y+2y=40

-2y=40-60

y=-20/-2

y=10 ( number of acrobat)

number of elephant=15-10=5 elephants

5 0

3 years ago

The Elliot’s have budgeted $2000 to install new wood floors in their home. The materials cost them $1055. If the installer charg

Anna35 [415]

Answer:

27 hours

Step-by-step explanation:

2,000-1,055=945

945/35=27

27 hours is the most the installer can work before going over Elliot's budget hope this helps :D

4 0

3 years ago

Read 2 more answers

Please include an explanation !!

erma4kov [3.2K]

Answer:

k just doing this for points

Step-by-step explanation:

6 0

3 years ago

Solve for x in the following equation:<br><br> x/a = y/b

nadya68 [22]

<span>As you have two fractions, you can cross multiply them. This gives: x/a = y/b to ay = xb. Then divide both sides by b to isolate x: ay/b = x.</span>

6 0

3 years ago

A 90% confidence interval for the mean height of students

Westkost [7]

Answer:

$ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635$

And the best answer on this case would be:

b) m = 4.635

Step-by-step explanation:

Let X the random variable of interest and we know that the confidence interval for the population mean $\mu$ is given by this formula:

$\bar X \pm t_{\alpha/2} \frac{s}{\sqrt{n}}$

The confidence level on this case is 0.9 and the significance $\alpha=1-0.9=0.1$

The confidence interval calculated on this case is $60.128 \leq \mu \leq 69.397$

The margin of error for this confidence interval is given by:

$ME =t_{\alpha/2} \frac{s}{\sqrt{n}}$

Since the confidence interval is symmetrical we can estimate the margin of error with the following formula:

$ME = \frac{Upper -Lower}{2}$

Where Upper and Lower represent the bounds for the confidence interval calculated and replacing we got:

$ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635$

And the best answer on this case would be:

b) m = 4.635

4 0

3 years ago