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3 years ago

“y=3x-4 and -2y=-6x+a” can someone help me figure out the math to solve for A?

Mathematics

1 answer:

avanturin [10]3 years ago

8 0

Answer:

a=-4 ??

Step-by-step explanation:

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Find the solutions for a triangle with a = 16, c =12, and B = 63º.

maks197457 [2]

Answer:

b. A = 71.6°; C = 45.40°; b =15.0

Step-by-step explanation:

The missing values can be found with the help of the Law of Cosine and properties of triangles:

Side b (Law of Cosine)

$b = \sqrt{a^{2}+c^{2}-2\cdot a \cdot c \cdot \cos B}$

$b = \sqrt{16^{2}+12^{2}-2\cdot (16)\cdot (12) \cdot \cos 63^{\circ}}$

$b \approx 15.022$

Angle A (Law of Cosine)

$\cos A = -\frac{a^{2} - b^{2}-c^{2}}{2\cdot b \cdot c}$

$\cos A = - \frac{16^{2}-15.022^{2}-12^{2}}{2\cdot (15.022)\cdot (12)}$

$\cos A = 0.315$

$A= \cos^{-1} 0.315$

$A \approx 71.639^{\circ}$

Angle C (Sum of internal angles in triangles)

$C = 180^{\circ} - 63^{\circ} - 71.639^{\circ}$

$C = 45.361^{\circ}$

Hence, the right answer is B.

6 0

3 years ago

Rate of change of d=60h + 20

77julia77 [94]

H=1/3+1/60d,d=R Hope this is correct.

6 0

3 years ago

Estimate the product of 126.12 and 2.2.

kifflom [539]

Product means the answer/result to a multiplication problem

Estimate means to form an approximation/ rough guess

126.12 x 2.2 = 277.464

This answer, 277.464, is the exact product

Its wanting us to find the estimate (there could be possible estimates, depending on what the instructions is asking for):

- 277
- 280
- 300

6 0

3 years ago

Please explain how do you get the answer. Also tell me am I correct or wrong.

Zigmanuir [339]

Your doing everything correctly

3 0

3 years ago

Read 2 more answers

Shelby found a tree branch that was 8 feet long.She chopped it into smaller pieces.If she wanted the wood pieces to be each have

Zielflug [23.3K]

16 pieces is the answer because, there is 12 in cues in one foot. So you take 12 and 8, multiply to get 96. Finally you need to divide by 6 and get 16

7 0

3 years ago