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Margarita [4]
3 years ago
15

How do I evaluate the function f(x)=3x-2 when x=-1?

Mathematics
1 answer:
inessss [21]3 years ago
8 0
F(x)=(3(-1))-2 so the answer is 5
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2 water taps A B fill a tank in 12 hrs. Tap A takes 10 hrs less than tap B to till tank separately. Find time taken by tap B to
Hatshy [7]

Answer:

11 hours

Step-by-step explanation:

Setting up a system of equations and using the substitution method will give you the number of hours used by each tap.  Let a = time for tap A and b = time for tap B:

a + b = 12  (A and B fill a tank in 12 hours)

a = b - 10 (tap A takes 10 hours less than tap B)

Substitute 'b - 10' for 'a' in the first equation:

b - 10 + b = 12

Combine like terms: 2b - 10 = 12

Add 10 to both sides: 2b - 10 + 10 = 12 + 10 or 2b = 22

Divide by 2: 2b/2 = 22/2

Solve for b: b = 11 hours

5 0
3 years ago
Triangle PQR has vertices at the following coordinates: P(0, 1), Q(3, 2), and R(5, -4). Determine whether or not triangle PQR is
sweet-ann [11.9K]
The answer is yes, and I will give you the calculation soon

PQ=\sqrt{3^{2} +1^{2}  }=\sqrt{10}
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\sqrt{10} ^{2} + (2\sqrt{10}) ^{2} =(5 \sqrt{2} )^{2}
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Answer:

-3/4 should be your answer. hope this helps you

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