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Schach [20]
3 years ago
10

Simplify each expression by combining like terms. 1) 3y+4x-y+2x 2) 3y+2+3x-y+5x

Mathematics
1 answer:
SVEN [57.7K]3 years ago
8 0

Answer:

Step-by-step explanation:

1) 2y + 6x

2) 2y + 8x +2

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Select the correct answer.
Vikentia [17]

Answer:

D. It has a single solution: x=-3, y= 26.

Step-by-step explanation:

3x + y=17

Subtract 3x so it is in y=mx+b form. So now it is y= -3x +17

Now plug in

x + 2 (-3x+17) = 49

x + -6x + 34 = 49   (distribute)

-5x = 15 (combine the x terms and subtract 34 on both sides)

x = -3  (divide -5 on both sides to get x alone)

now plug in x into any other equation to get y

x + 2y = 49

-3 + 2y = 49

2y = 52 (add 3 on both sides)

y = 17  (divide 2 on both sides to get y alone)

(-3, 26)

3 0
3 years ago
The grades on a chemistry midterm at Springer are roughly symmetric with μ=67\mu = 67μ=67mu, equals, 67 and σ=2.0\sigma = 2.0σ=2
Lina20 [59]

Answer: - 0.50

Step-by-step explanation:

Given the following :

Mean score = 67

Standard deviation = 2

To obtain the Zscore, use the relation:

Zscore = (X - mean) / standard deviation

Williams score = 66 = X

Hence,

Zscore = (66 - 67) / 2

Zscore = - 1 / 2

Zscore = - 0.50

7 0
4 years ago
A flagpole is casting a 20 feet shadow. the flagpole measures 16 feet find the angle of elevation of the sun
Oksanka [162]

Answer:

39°

Step-by-step explanation:

==>Given:

Shadow length = 20ft

Flag height = 16ft

==>Required:

Angle of elevation of sun (θ)

==>Solution:

To calculate the angle of elevation of the sun, recall the trigonometry formula SOHCAHTOA.

We are given adjacent side = 20ft, and opposite side = 16ft

Therefore, we would use TOA, which is:

tan θ = Opposite/Adjacent

tan θ = 16/20

tan θ = 0.8

θ = 38.6598083 ≈ 39°

Angle of elevation of the sun = 39°

5 0
3 years ago
Find the value of each variable. Write answers in simplest radical form.
ExtremeBDS [4]

Answer:

The value of n is 6.

Step-by-step explanation:

Given that these 2 triangles form a square so we can assume that all sides are same. Then, we have to apply Pythagoras Theorem, a² + b² = c², where a, b are sides and c is hypotenuse :

n² + n² = (6√2)²

2n² = 6² × (√2)²

2n² = 72

n² = 72 ÷ 2

n² = 36

n = √36

n = 6

8 0
3 years ago
Gretchen walks her dog 3 times a day. Each time she walks the dog ,she walks 1,760 yards how many yards does she walk her dog in
anzhelika [568]
The answer would be 5,280 because 1,760×3=5,280
6 0
3 years ago
Read 2 more answers
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