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gladu [14]
3 years ago
7

Evaluate the expression y-x+ z for x = 4.6, y=6, and z=0.59

Mathematics
1 answer:
nignag [31]3 years ago
8 0

Answer:

<h2><em>1</em><em>.</em><em>9</em><em>9</em></h2>

<em>Solution,</em>

<em>y-x+</em><em>z</em>

<em>=</em><em>6</em><em>-</em><em>4</em><em>.</em><em>6</em><em>+</em><em>0</em><em>.</em><em>5</em><em>9</em>

<em>=</em><em>6</em><em>+</em><em>0</em><em>.</em><em>5</em><em>9</em><em>-</em><em>4</em><em>.</em><em>6</em>

<em>=</em><em>6</em><em>.</em><em>5</em><em>9</em><em>-</em><em>4</em><em>.</em><em>6</em>

<em>=</em><em>1</em><em>.</em><em>9</em><em>9</em>

<em>Hope </em><em>this </em><em>helps.</em><em>.</em><em>.</em>

<em>good </em><em>luck</em><em> on</em><em> your</em><em> assignment</em>

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2 years ago
Find the cosine of angle B.
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\boxed { \text {Cosine Rule : } a^2 = b^2 + c^2 - 2bc \cos(A) }

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9² = 12² + 15² - 2 (12) (15) cos (B)

81 = 144 + 225 - 360 cos(B)

81 = 369 - 360 cos (B)

360 cos (B) = 369 - 81

360 cos (B) = 288

cos (B) = 0.8

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Answer: Cosine B = 0.8

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\boxed { \text {Cosine Rule : } a^2 = b^2 + c^2 - 2bc \cos(A) }

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12² = 15² + 9² - 2 (15)(9) cos (A)

144 = 225 + 81 - 270 Cos A

144 = 306 - 270 Cos A

270 Cos A = 162

Cos A = 3/5 or 0.6

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Answer: Cosine Angle A = 3/5

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Step-by-step explanation:

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Find an explicit rule for the nth term of the sequence.The second and fifth terms of a geometric sequence are 18 and 144, respec
vova2212 [387]

Given:

second term = 18

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The nth term of a geometric sequence is:

\begin{gathered} a_n\text{ = ar}^{n-1} \\ Where\text{ a is the first term} \\ r\text{ is the common ratio} \end{gathered}

Hence, we have:

\begin{gathered} \text{ar}^{2-1}\text{ = 18} \\ ar\text{ = 18} \\  \\ ar^{5-1}=\text{ 144} \\ ar^4\text{ =144} \end{gathered}

Divide the expression for the fifth term by the expression for the second term:

\begin{gathered} \frac{ar^4}{ar}\text{ = }\frac{144}{18} \\ r^3\text{ = }\frac{144}{18} \\ r\text{ = 2} \end{gathered}

Substituting the value of r into any of the expression:

\begin{gathered} ar\text{ =  18} \\ a\text{ }\times\text{ 2 =  18} \\ Divide\text{ both sides by 2} \\ \frac{2a}{2}\text{ =}\frac{18}{2} \\ a\text{ = 9} \end{gathered}

Hence, the explicit rule for the sequence is:

a_n\text{ = 9\lparen2\rparen}^{n-1}

5 0
1 year ago
Which ordered pair is the solution to the system of equations?
d1i1m1o1n [39]
\begin{cases}-3x+4y=-20\\y=x-4\end{cases}\\\\\\-3x+4(x-4)=-20\\\\-3x+4x-16=-20\\\\x-16=-20\quad|+16\\\\x-16+16=-20+16\\\\\boxed{x=-4}\\\\\\y=x-4\\\\y=-4-4\\\\\boxed{y=-8}

Answer C.
4 0
2 years ago
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