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Lana71 [14]
3 years ago
13

Please help ill mark brainliest

Mathematics
2 answers:
tia_tia [17]3 years ago
5 0

Answer:

x=4 y=1

Step-by-step explanation:

given equation

x+y=5

so x= 5-y.......(i)

and

x-2y=2

so x= 2+2y........(ii)

then

5-y=2+2y

therefore y=1

and x=4

Firdavs [7]3 years ago
5 0

Answer:

5,0

Step-by-step explanation:

the blue line where it's at 5,0

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2.50+0.50=21 help meeeeeeeeeee
Rzqust [24]

Answer:

You are missing some of the equation my dude

Step-by-step explanation:

5 0
3 years ago
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What is the value of tan (-2pi/3)?
wolverine [178]
This revolves around exact trig values - no easy way to say this, you just need to memorise them. They are there for sin cos and tan, but I will give you the main tan ones below - note this is RADIANS (always work in them when you can, everything is better):

tan0: 0
tanpi/6: 1/sqrt(3) 
tanpi/4: 1
tanpi/3: sqrt(3)
tanpi/2: undefined

Now we just need to equate -2pi/3 to something we understand. 2pi/3 is 1/3 of the way round a circle, so -2pi/3 is 1/3 of the way round the circle going backwards (anticlockwise), so on a diagram we already know it's in the third quadrant of the circle (somewhere between pi and 3pi/2 rads).
We also know it is pi/3 away from pi, so we are looking at sqrt(3) or -sqrt(3) because of those exact values.

Now we just need to work out if it's positive or negative. You can look up a graph of tan and it'll show that the graph intercepts y at (0,0) and has a period of pi rads. Therefore between pi and 3pi/2 rads, the values of tan are positive. Therefore, this gives us our answer of sqrt(3).
4 0
3 years ago
Read 2 more answers
Find the value of y, given that m_ KLM = 137º.
Musya8 [376]

Answer:

y ≈ 5.63

Step-by-step explanation:

m∠KLN and m∠NLM have to add up to m∠KLM

m∠KLN = 47°

m∠NLM = 16y°

m∠KLM = 137°

47 + 16y = 137

16y = 90

y = 45/8

y = 5.625

y ≈ 5.63

6 0
3 years ago
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Help please my teacher isn't the greatest.
Schach [20]

Answer:

x = 9.5

Step-by-step explanation:

We see that the entire length of DF is equal to 34. That means segment DE and segment EF must combine to equal 34:

3x - 6 + x + 2 = 34

4x - 6 + 2 = 34

4x - 4 = 34

4x = 38

x = 9.5

6 0
3 years ago
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Cereal costs 2.79 for 16.4 ounces. At this rate how much does 25 ounces of cereal cost? Round to the Nearest Cent.
ankoles [38]

Answer:

$4.25

Step-by-step explanation:

We can create a proportion to find how much 25 oz will cost:

\frac{2.79}{16.4} = \frac{x}{25}

We can cross multiply to find x.

16.4x = 69.75

x = 4.25

So, this means 25 ounces of cereal will be $4.25

5 0
3 years ago
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