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erastovalidia [21]
3 years ago
7

Help please really needed

Mathematics
1 answer:
Anarel [89]3 years ago
7 0

Answer:

Either :

1/2 10x+1/2 20y+1/2 10z

or

5x+10y+5z

Step-by-step explanation:

You're just multiplying everything by 1/2

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Find P(A or B) if the events are disjointed. P(A) =6/25 , and P(B) =9/25 .
nevsk [136]
Here, "disjointed" signifiies that Event A and Event B are independent; neither outcome influences the other.  In such a case, the union of A and B is given by the sum of the two probabilities P(A) and P(B).

Here, that sum is P(A or B) = 6/25 + 9/25, or 15/25, or 0.6.


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3 years ago
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Kelly has four times as many songs on her music player as Lou Tiffany has six times as many songs on your music player as Lou.al
Ivahew [28]
Kelly: 4y Lou: y Tiffany: 6y

4y + y + 6y = 11y

682/11 =62

Kelly: 4x62 = 248 songs
Lou: 1x63 = 62 songs
Tiffany: 6x62 = 373 songs
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3 years ago
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Find the radius of a circle with the given circumference.<br> 12<br> in
vampirchik [111]

Step-by-step explanation:

<em>Given </em>

<em>circumference </em><em>=</em><em> </em><em>1</em><em>2</em><em> </em><em>inch</em>

<em>π</em><em> </em><em>=</em><em> </em><em>3</em><em>.</em><em>1</em><em>4</em>

<em>radius </em><em>(</em><em>r) </em><em> </em><em>=</em><em> </em><em>?</em>

<em>We </em><em>know </em>

<em>circumference </em><em>=</em><em> </em><em>2</em><em>π</em><em>r </em>

<em>1</em><em>2</em><em> </em><em> </em><em>=</em><em> </em><em>2</em><em>*</em><em> </em><em>3</em><em>.</em><em>1</em><em>4</em><em> </em><em>*</em><em> </em><em>r</em>

<em>r </em><em>=</em><em> </em><em>1</em><em>2</em><em> </em><em>/</em><em> </em><em>6</em><em>.</em><em>2</em><em>8</em>

<em>Therefore </em><em> </em><em>r </em><em>=</em><em> </em><em>1</em><em>.</em><em>9</em><em>1</em><em> </em><em>inch</em>

8 0
3 years ago
Write the algebraic expression for each word problem.
Annette [7]

Answers:

<u>Question #6</u>

(b - 7) + 10

<u>Question #7</u>

20 + (<em>w</em> × 50)

<u>Question #8</u>

<u />\frac{c}{5}<u />

<u>Question #9</u>

5 + (2 · <em>t</em>)

<u>Question #10</u>

(d · 4) + (p · 2)

5 0
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Anyone understand the answer
oksian1 [2.3K]

\bf 2\frac{1}{2}\left( 8x-\cfrac{4}{5} \right)=-62\implies \cfrac{5}{2}\left( 8x-\cfrac{4}{5} \right)=-62\implies \stackrel{\textit{distributing}}{\cfrac{5\cdot 8}{2}x-\cfrac{5\cdot 4}{2\cdot 5}}=-62 \\\\\\ 20x-2=-62\implies 20x=-60\implies x=\cfrac{-60}{20}\implies x=-3

7 0
3 years ago
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