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4 years ago

Help! I just started this in school and I am still confused

Mathematics

2 answers:

klasskru [66]4 years ago

8 0

For this kind of problem you would multiply the discount by the sale price. That would look like this 146.54 * .15 = 21.98. That answer would be how much the discount was. Once you find the discount you add the discount to the sale price to know what the original price was. That would be 146.54 + 21.98 = $168.52.

Tomtit [17]4 years ago

3 0

Okay, to work out the original price, all you have to do is get the sale price ($146.54) and then divide it by 1 - 0.[whatever the percentage is]. In this case, the percentage is 15%, so you do 1 - 0.15 = 0.85.

So to work out the original price, you do:
146.54 ÷ 0.85 = $172.40

The original price is $172.40. :)

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Please help. Find the area of the shaded polygons

ololo11 [35]

Answer:

A) yellow = 4.5

B) pink = 8

C) orange =9

Step-by-step explanation:

A) yellow = 12-2-1-4.5=4.5

B) pink = 7 whole plus 2 half equals 8

C) orange = 16-1-1.5-1.5-3=9

5 0

3 years ago

How many ounces of a silver alloy that costs $5.50 per ounce should be mixed with one that costs $7.00 per ounce to make a new 3

Pepsi [2]

Answer:

135.73 ounces of a silver alloy that costs $5.50 per ounce should be mixed.

Step-by-step explanation:

Given:

A silver alloy that costs $5.50 per ounce should be mixed with one that costs $7.00 per ounce to make a new 30 ounce alloy that costs $6.40 per ounce.

Now, to find the ounces of silver alloy.

Let the silver costs $5.50 per ounce be $x.$

And the silver costs $7.00 per ounce be $y.$

So, the total ounce make a new alloy:

$x+y=30\\y=30-x$ ....(1)

Now, the total costs of silver alloy:

$5.50x+7y=6.4$

Putting the value of $y$ from equation (1) in the place of $y$ :

$5.50x+7(30-x)=6.4$

$5.50x+210-7x=6.4$

$-1.5x+210=6.4$

Subtracting both sides by 210 we get:

$-1.5x=-203.6$

Dividing both sides by -1.5 we get:

$x=135.73$

Therefore, 135.73 ounces of a silver alloy that costs $5.50 per ounce should be mixed.

7 0

3 years ago

For the figure below the base area and the height has been provided. find the VOLUME

Inga [223]

Answer:

Step-by-step explanation:

To find the volume of this solid, multiply the base area by the height:

V = (25 cm²)(4 cm) = 100 cm³

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3 years ago

How far does judy travel in 2 3/4 hours if she travels at the rate of 5 1/2 miles per hour

Roman55 [17]

Judy travel's 15.125 miles or 15 $\frac{1}{8}$ miles in 2 3/4 hours

How to solve such time related questions?

The key concept for solving such questions is the relationship between speed, distance and time.

The relationship between them is Distance = Speed x Time

Given:

Speed = 5 1/2 miles per hour
Time = 2 3/4 hours

Substituting it in the relationship we get,

Distance = Speed x Time

Distance = 5 1/2 miles per hour x 2 3/4 hours

Distance = $\frac{11}{2} X \frac{11}{4}$ miles

Distance = $\frac{121}{8}$ miles or 15 $\frac{1}{8}$ miles

Thus Judy travel's 15.125 miles or 15 $\frac{1}{8}$ miles in 2 3/4 hours

Learn more about time related questions here :

brainly.com/question/16403317

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2 years ago

the track team is trying to reduce their time for a relay race. First they reduce their time by 2.1 minutes. then they are able

koban [17]

Their beginning time was 16.06 minutes.

Step-by-step explanation:

The track team is trying to reduce their time for a relay race.

First they reduce their time by 2.1 minutes, take it as $t_{1}$ . Then they are able to reduce that time by 10 minutes, take it as $t_{2}$ . Let ‘X’ be the time in minutes at the beginning.

Given that their final time is 3.96 minutes, then their beginning time can be calculated as below,

$X-t_{1}-t_{2}=3.96 \text { minutes }$

$X=3.96+t_{1}+t_{2}$

By substituting the values, we get

$X=3.96+2.1+10=16.06 \text { minutes }$

Hence, their beginning time was 16.06 minutes.

7 0

4 years ago