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BlackZzzverrR [31]
2 years ago
12

NEED ANSWER ASAP!!

Mathematics
1 answer:
erik [133]2 years ago
7 0

Answer:

A=-2; B=-1

Step-by-step explanation:

3a - 2b + 4 =0

2a -5b -1 = 0

Let's multiple the top equation by 2, and the bottom by -3, and then use addition.

[3a - 2b + 4 =0]*2

[2a -5b -1 = 0]*(-3)

6a-4b+8=0

-6a+15b+3=0

Now add the two equations together:

11b + 11 = 0

Subtract 11 from both sides

11b = -11

Divide both sides by 11

b=-1

Substitute in the first equation:

3a - 2(-1) + 4 = 0

Simplify to get 3a+6 = 0

Subtract 6 from both sides to get 3a = -6

Divide both sides by 3 to get a=-2

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Find cosØ if sinØ=-12/13 and tanØ&gt;0.<br><br> A) -5/12<br> B) -5/13<br> C) 12/5<br> D) -13/12
mestny [16]

Answer:

-5/13

Step-by-step explanation:

sin theta = opp / hyp

sin theta = -12 /13

we can find the adj side by using the pythagorean theorem

adj^2 + opp ^2 = hyp^2

adj^2 +(-12)^2 = 13^2

adj^2 +144 =169

adj^2 = 169-144

adj^2 = 25

Taking the square root of each side

adj = ±5

We know that it has to be negative since it is in the third quad

adj = -5

cos theta = adj / hyp

cos theta = -5/13

8 0
3 years ago
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Citrus2011 [14]
B. Angle B= Angle E
As this would only prove the AAA Similarity theorem, but not any Congruence Rule
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3 years ago
Translate and simply: subtract 18 from -11
navik [9.2K]
Answer: -29

Subtract 18 FROM -11.
That means that 18 would go after -11.

-11 - 18 = -29
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3 years ago
The distance from jason's house to school is 0.5 meters. What is the distance in meters?
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Answer:

the answer to you question is C

Step-by-step explanation:

if this helps lmk and have a brilliant day :D

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