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Jet001 [13]
2 years ago
13

Find the value of f(-9)

Mathematics
1 answer:
almond37 [142]2 years ago
7 0

Answer: 2

Step-by-step explanation:

When x=-9, y=2. So, f(-9)=2.

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I'm not sure if this is right or not could someone also explain why ?
nikitadnepr [17]
The mapping rule for 90 degrees counterclockwise would be (-y,x). So if you had (x,y) it would transfer to (-y,x). Yours is wrong it should be (4,-3). Remember
-(-4) is 4 and -3 stays as -3.

Basically, memorize these mapping rules.

Hope this helped!
6 0
3 years ago
m∠RSU=(5x+7)° and m∠UST=(9x−1)°. If ∠RSU and ∠UST are complementary, what is the measure of each angle?
ArbitrLikvidat [17]

Answer:

37° and 53° respectively.

Step-by-step explanation:

We need to know that the angles are complementtary if ∠RSU + ∠UST = 90°. Then,

5x+7 + 9x-1 = 90

5x + 9x +7 -1 = 90

14x +6 = 90

14x = 90 - 6

14x = 84

x = 84/14

x = 6.

Then, the angle ∠RSU has measure 5(6)+ 7 = 30+7 = 37, and the angle ∠UST has measure 9(6) - 1 = 54-1 = 53.

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3 years ago
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The answer is  don't ask me to explain cuz i can't O.O

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Step-by-step explanation:

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Solving Systems by Addition method
balandron [24]
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