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zavuch27 [327]
3 years ago
12

Ralph and Jody go to the store to buy chips and candy bars. Ralph buys 3 bags of potato chips and 4 candy bars for 375 cents. Jo

dy buys 6 bags of potato chips and 4 candy bars for 600 cents. Later, Maria meets up with Ralph and Jody. She wants to buy one bag of potato chips and one candy bar from them. Ralph and Jody need to figure out what the charge her for the items.
Write a system of equations that will help Ralph and Jody figure out the price of each item. Explain.
Mathematics
1 answer:
s2008m [1.1K]3 years ago
3 0
3x+4y = 375
6x+ 4y= 600
-------------------
6x-3x  = 600 - 375

3x=225
x=225:3
x=75 cents

3*x+4y= 375
3*75+4y=375
225 +4y = 375
4y=375-225
4y=150
y=150:4
y=37,5 cents

the price is 75+37,5=112,5 cents for one bag of potato chips and one candy bar

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Two Factors of 36 add up to 15. what are they
lana66690 [7]
The answer is three and twelve
8 0
2 years ago
What is the relationship between the 6’s in 660,472
belka [17]

well, the 6 in the ten thousands place is 10 times left then the 6 in the hundred thousands place as well as the 6 in the hundred thousand place is 10 times more then the 6 in the ten thousands place.

6 0
3 years ago
Thickness measurements of ancient prehistoric Native American pot shards discovered in a Hopi village are approximately normally
mariarad [96]

Answer:

a) 0.1587 (or 15.87%)

b) 0.0478 (or 4.78%)

c) 0.7935 (or 79.35%)

Step-by-step explanation:

Find the following probabilities:

(a) the thickness is less than 3.0 mm

We need to find the area under the Normal curve with a mean of 4.5 mm and a standard deviation of 1.5 mm to the left of 3 mm

<h3>(See picture 1 attached) </h3>

We can do that with the help of a calculator or a spreadsheet.

<em>In Excel use </em>

<em>NORMDIST(3,4.5,1.5,1) </em>

<em>In OpenOffice Calc use  </em>

<em>NORMDIST(3;4.5;1.5;1) </em>

and we get the value 0.1587 (or 15.87%)

(b) the thickness is more than 7.0 mm

Now we need the area to the right of 7 (1 - the area to the left of 7)

<h3>(See picture 2 attached) </h3>

<em>In Excel use </em>

<em>1-NORMDIST(7,4.5,1.5,1)  </em>

<em>In OpenOffice Calc use  </em>

<em>1-NORMDIST(7;4.5;1.5;1) </em>

and we get the value 0.0478 (or 4.78%)

(c) the thickness is between 3.0 mm and 7.0 mm

We are looking for the area between 3 and 7

<h3>(See Picture 3) </h3>

Since the area under the Normal equals 1, we have

Area to the left of 3 + Area between 3 and 7 + Area to the right of 7 = 1

Hence,  

0.1587 +  Area between 3 and 7 + 0.0478 = 1

and

Area between 3 and 7 = 1 - 0.1587 - 0.0478 = 0.7935 (or 79.35%)

4 0
3 years ago
Read 2 more answers
If 6 cakes cost £2.40 how much do 10 cakes cost
Alja [10]
6 cakes ... £2.40
10 cakes ... £x = ?

If you would like to know how much do 10 cakes cost, you can calculate this using the following steps:

6 * x = 10 * 2.40
6 * x = 24    /6
x = 24/6
x = £4

Result: 10 cakes cost £4.
3 0
3 years ago
Which equation(s)
GalinKa [24]

Answer:  A) y = 7x

<u>Step-by-step explanation:</u>

In order to be a proportional relationship, the equation MUST pass through the origin (0, 0) and only contain two coordinates

A) 0 = 7(0)      --->        0 = 0 TRUE

B) 0 = 2 + 3(0) --->       0 = 2 False

C) 0 = Vz(0)    --->        Too many variables so False

D) 0 = 5 - 0    --->         0 = 5 False

7 0
3 years ago
Read 2 more answers
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