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mariarad [96]
3 years ago
6

I have 3 math questions please help 30 points c:

Mathematics
1 answer:
zmey [24]3 years ago
5 0
1)
2x+y=-2
(2,y)  then: x=2
Therefore:
2(2)+y=-2
4+y=-2
y=-2-4
y=-6

answer: A.  -6

2)
answer: C. there is not relationship between the variables

3)
Answer: C.t
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If gasoline costs 1.50 euros per liter it will cost how much to drive 220 kilometers
jok3333 [9.3K]

Answer:

11.79\ euros

Step-by-step explanation:

<u><em>The complete question is</em></u>

Suppose that a new​ fuel-efficient European car travels an average of 28 kilometers on 1 liter of gasoline. If gasoline costs 1.50 euros per​ liter, how much will it cost to drive 220 kilometers ?

step 1

using proportion

Find out the number of liters of gasoline needed for 220 kilometers

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\frac{28}{1}\ \frac{Km}{L}=\frac{220}{x}\ \frac{Km}{L}\\\\x=220/28\\\\x=7.86\ L

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Please help me on this! Giving brainlest thanked and 5 starred :) (if correct)
stiks02 [169]

Answer:

Seems like your other question was deleted by a moderator. I'll help here tho!

4.) you can use cross products, or make them into fractions and simplify them, or put them in decimal form

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Step-by-step explanation:

hope it helps! have a great holiday season and stay safe! if you need/want an explanation, just comment and I'll edit my answer for ya! :)

Step-by-step explanation:

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