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Mathematics

1 answer:

alexandr402 [8]3 years ago

6 0

Answer:

For this question, you need you use the unitary method or proportion. If you apply these ideas to it. You should be able to do this question. Here's my working:

Step-by-step explanation:

25ounces = $3.49

**You need to find what's the price of one ounce**

So assume it like this:

1 ounce = $X

To solve for X, you figure out how did 25 became 1. In this case, it has been divided by 25. So you do the same thing on the other side: Which is $3.49 ÷25 = 0.1396 (Price per ounce for choice A)

Choice B workings:

You apply the same method, so it's 4.79 ÷ 45 = 0.1064444444444 (Price per ounce for Choice B)

So in conclusion, Choice B is cheaper. 

**Please note that I'm not a maths teacher, please double check your answer, my answer might be incorrect**

Hope it helps!

Cheers! :)

You might be interested in

Is -18.75 rational or irrational number

galina1969 [7]

Answer:

-18.75 is a rational number. A rational number is any number that has either a repeating decimal or one that ends. It doesn’t no go on, so it is considered rational. Hopefully this helps! Feel free to mark brainliest!

6 0

3 years ago

A rescue helicopter flew from its home base for 35 kilometers on a course of 330 degrees to pick up an accident victim. It then

artcher [175]

I've drawn a triangle to represent the journey (see attached.

The angle from Home to Victim to Hospital is:

a = $90 - (360 - 330) = 90- 30 = 60^o$

Using the cos rule, we can solve for the length x:

$a^2 = b^2 +c^2 - 2bccosA
\\x^2 = 35^2+25^2-2(35)(25)cos60
\\x^2 = 1850 - 875
\\x^2 = 975
\\x = \sqrt{975}
\\x = 31.2249...$

Using the cos rule, we can solve for angle b:

$a^2 = b^2 +c^2 - 2bccosA
\\35^2 = 31.22...^2+25^2-2(31.22...)(25)cosb
\\1225 = 975 + 625 - 1561.249...cosb
\\-375 = -1561.249...cosb
\\b = cos^{-1}( \frac{-375}{-1561.249...}) 
\\b = 76.1...$

So the bearing the helicopter has to travel is:

270 - 76.1 = 193.9 degrees (1 dp)

And the distance it travels is 31.2 km (1 dp)