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JulijaS [17]
2 years ago
14

The variable x is twice the value of the variable y and the sum of x and y is 42 solve for x and y.

Mathematics
2 answers:
Lunna [17]2 years ago
8 0

Answer:

x=28     x=14

Step-by-step explanation:

x+y=42

2y=x

My method of doing this is a little unorthodox so this is probably going to make no sense... but here goes...

42/2=21

21*(2/3)=14

14*2=28

Oksi-84 [34.3K]2 years ago
4 0

Write two equations with the given information:

1) x = 2y ( x is twice the value of y)

2) x + y = 42

Replace x in the second equation with the value of x in the first equation:

2y + y = 42

Simplify:

3y = 42

Divide both sides by 3:

y = 42 / 3

y = 14

Now we have the value for Y, solve for x by replacing y with 14:

x = 2y

x = 2(14)

x = 28

X = 28 and y = 14

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Answer:

BC < CE < BE < ED < BD

Step-by-step explanation:

In the triangle BCE,

m∠BEC + m∠BCE + m∠CBE = 180°

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m∠BEC = 180 -  135

m∠BEC = 45°

Order of the angles from least to greatest,

m∠BEC < m∠CBE > mBCE

Sides opposite to these sides will be in the same ratio,

BC < CE < BE ----------(1)

Now in ΔBED,

m∠BEC + m∠BED = 180°

m∠BED = 180 - 45

             = 135°

Now, m∠BDE + m∠BED + DBE = 180°

11° + 135°+ m∠DBE = 180°

m∠DBE = 180 - 146

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Order of the angles from least to greatest will be,

∠BDE < ∠DBE < ∠BED

Sides opposite to these angles will be in the same order.

BE < ED < BD ----------(2)

From relation (1) and (2),

BC < CE < BE < ED < BD

7 0
2 years ago
A school purchases boxes of candy bars.
Cloud [144]

Answer:

$0.20 per candy bar

Step-by-step explanation:

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3 0
3 years ago
Find the slope of the line that passes through (3, 11) and (10, 6).
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Answer:

-5/7

Step-by-step explanation:

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6-11 = -5 so it rose down by 5 units

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5 0
2 years ago
A car dealership earns a portion of its profit on the accessories sold with a car. The dealer sold a Toyota Camry loaded with ac
lina2011 [118]

Answer:

y = 2666.67

Step-by-step explanation:

Well to solve this we can make a system of equations.

x = cost of car alone

y = cost of accesories,

\left \{ {{x+y=24000} \atop {x=8y}} \right.

So now we plug in 8y for x in x + y = 24000.

(8y) + y = 24000

9y = 24000

Divide both sides by 9

y = 2666.666666

or 2666.67 rounded to the nearest hundredth.

Now that we have y we can plug that in for y in x=8y.

x = 8(2.666.67)

x = 21,333.33 rounded to the nearest hundredth.

<em>Thus,</em>

<em>accessories "y" cost around 2666.67.</em>

<em />

<em>Hope this helps :)</em>

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