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NeTakaya
3 years ago
9

What is the solution to the system of equations? Use the substitution method.

Mathematics
1 answer:
ludmilkaskok [199]3 years ago
3 0
The answer is A. (3,-1/2)
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To drive to work, Dave has to drive 20 miles east and then 15 miles north. If there were a direct road going northeast, how many
suter [353]
By the Pythagorean theorem:

x= \sqrt{20^2+15^2}= \sqrt{400+225}= \sqrt{625}=25 \ miles

7 0
3 years ago
BAC ~ DEC what is the value of x?
Anna007 [38]

Answer: x = 37.8

Step-by-step explanation: We start with triangle ABC with two sides given as 15 and 18. We shall make angle C the reference angle and thereby calculate the third side, line BC.

Since we have the opposite side as 15, and the adjacent side (which lies between the reference angle and the right angle) as 18, we can use the tangent of the angle C

Tan C = Opp/Adj

Tan C = 15/18

Tan C = 0.8333

From our table of values/use of the calculator

Tan C = 39.8

Angle C in triangle ACB = Angle C in triangle ECD (Opposite angles are equal).

That takes us to triangle ECD, since the reference angle is known (39.8) and the opposite side is also given (31.5), we can now calculate the adjacent which is side x.

Tan C = Opp/Adj

Tan 39.8 = 31.5/x

when you cross multiply, x moves to the left hand side, while Tan 39.8 moves to the right hand side

x = 31.5/Tan 39.8

x = 31.5/0.8333

<u>x = 37.8</u>

5 0
3 years ago
Can someone simplify this for me and the answer I don’t know help quickly!!!
Vinil7 [7]

Answer:

9/10

Step-by-step explanation:

8 0
2 years ago
Solve for brainliest
Kaylis [27]

Answer:

8.5 feet?

Step-by-step explanation:

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3 years ago
What is 2 1/4 - 1 2/5 please help me
Troyanec [42]

Answer: 17/20=0.85

Step-by-step explanation:

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3 years ago
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