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koban [17]
2 years ago
15

(3x + 2y = 7 (7x-2y = 3

Mathematics
1 answer:
sineoko [7]2 years ago
8 0
Answer for the equation by elimination

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Luke ran 12.5 miles and 2 hours and 25 miles in 4 hours what is the constant of proportionality
grandymaker [24]

Answer:

6.25 miles per hour

Step-by-step explanation:

3 0
3 years ago
K^2+k=0 what does k=
FinnZ [79.3K]

Answer:

k = K^2

Step-by-step explanation:

Subtract  K^2 from both sides of the equation.

6 0
3 years ago
ACD is a triangle and B is a point on AC. AB = 8cm and BC is 6cm. Angle BCD = 48° and angle BDC = 50°. (a) Find the length of BD
FromTheMoon [43]

Answer:

  • 5.8206 cm
  • 10.528 cm
  • 23.056 cm^2

Step-by-step explanation:

(a) The Law of Sines can be used to find BD.

  BD/sin(48°) = BD/sin(50°)

  BD = (6 cm)(sin(48°)/sin(60°)) ≈ 5.82064 cm

__

(b) We can use the Law of Cosines to find AD.

  AD^2 = AB^2 +BD^2 -2·AB·BD·cos(98°) . . . . . angle ABD = 48°+50°

  AD^2 ≈ 110.841

  AD ≈ √110.841 ≈ 10.5281 . . . cm

__

(c) The area of ∆ABD can be found using the formula ...

  A = ab·sin(θ)/2 . . . . . where a=AB, b=BD, θ = 98°

  A = (8 cm)(5.82064 cm)sin(98°)/2 ≈ 23.0560 cm^2

_____

Angle ABD is the external angle of ∆BCD that is the sum of the remote interior angles BCD and BDC. Hence ∠ABD = 48° +50° = 98°.

5 0
3 years ago
Point Q is the midpoint of GH. GQ=2x+3, and GH=5x−5 .
olasank [31]
Since point Q is the midpoint of GH, that means that GH-GQ=HQ=GQ (since Q is the midpoint). Plugging them in, we get 5x-5-(2x+3)=3x-8=GQ=HQ. Since Q is the midpoint, that means that 3x-8=2x+3=GQ=HQ. Subtracting 2x from both sides as well as adding 8, we get that x=11 and 2(11)+3=25=GQ by plugging x into 2x+3
7 0
3 years ago
Wirte an inequality to comepare the ratios 2/4 and 5/6​
polet [3.4K]
The inequality is < so 2/4 < 5/6.
5 0
3 years ago
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