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Basile [38]
3 years ago
15

Help pls someone?!? )):

Mathematics
1 answer:
matrenka [14]3 years ago
7 0

Answer:

Step-by-step explanation:

a(n) = n² - 3n - a(n-1) and a(1) = 4

We have a(1) = 4 and want a(2) (for which n = 2).

a(2) = 2² - 3(2) - a(2-1)  →  a(2) = 4 - 6 - 4 = -6 = a(2)

a(3) = 3² - 3(3) - (-6) = 9 - 9 + 6 = 6 = a(3)

a(4) = 4² - 3(4) - 6 = 16 - 12 - 6 = -2 = a(4)

a(5) = 5² - 3(5) + 2 = 12 = a(5)

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timurjin [86]

Answer:

d

Step-by-step explanation:

an equation always shows that sum is equal

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3 0
3 years ago
Given: △RST ~ △VWX
tatiyna

Answer:

Given

Step-by-step explanation:

Given that: △RST ~ △VWX, TU is the altitude of △RST, and XY is the altitude of △VWX.

Comparing △RST and △VWX;

TU ~ XY (given altitudes of the triangles)

<TUS = <XYW (all right angles are congruent)

<UTS ≅ <YXW (angle property of similar triangles)

Thus;

ΔTUS ≅ ΔXYW (congruent property of similar triangles)

<UTS + <TUS + < UST = <YXW + <XTW + <XWY = 180^{0} (sum of angles in a triangle)

Therefore by Angle-Angle-Side (AAS), △RST ~ △VWX

So that:

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4 0
3 years ago
What is the answer to −9−(−13) its integers
Setler [38]

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Step-by-step explanation:

6 0
3 years ago
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dedylja [7]

Answer:

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Step-by-step explanation:

8= 8 + 4x +5x

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Divide by 9

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kotegsom [21]

Answer:

(- 1, 2)

Step-by-step explanation:

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f(x) = x² + 2x + 3 ← is in standard form

with a = 1 and b = 2, hence

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4 0
3 years ago
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