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Rasek [7]
3 years ago
15

Hey guys i need help plz will give brainlist

Mathematics
1 answer:
nadya68 [22]3 years ago
5 0

Step-by-step explanation:

Effective resistance in the 30Ω and 40Ω parallel circuit = 1 / (1/30 + 1/40) = 120/7 Ω.

20Ω + 10Ω = 30Ω

Effective resistance in the 50Ω and (20Ω + 10Ω) parallel circuit = 1 / (1/50 + 1/30) = 75/4 Ω.

Now we can add the resistances up:

Effective resistance for circuit

= 120/7 Ω + 75/4 Ω = 1005/28 Ω.

Hence I = V / R

= 9.0V / (1005/28 Ω) = 0.25A. (2s.f.)

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If a plane slices the solid figure shown below, what is the largest number of sides the cross section can have? Type your answer
vitfil [10]

Answer:

5

Step-by-step explanation:

The figure has 5 faces. A plane can be chosen that slices all of them, hence results in a 5-sided cross-section figure.

_____

<em>How</em>

Draw a line on one of the triangular bases that is not parallel to any edge. It must intersect 2 of the 3 edges. Draw a line on the opposite triangular base parallel to the first line, but that intersects the edge parallel to the one not intersected by the first line.

The plane containing the two lines you drew will intersect all 5 faces of the prism.

8 0
4 years ago
Evaluate the function for x = –4c if c = –2.
irga5000 [103]
<span>x = –4c
</span>if c = -2 then x = -4(-2) = 8

I believed you  had a typo, function should be f(x) = -3x^2 - 4x 
so
<span>f(x) = -3x^2 - 4x 
</span>f(x) = -3(8^2) - 4(8)
f(x) = -3(64) - 32
f(x) = -192 - 32
f(x) = -224

answer

<span>C.
–224</span>
5 0
4 years ago
A bike wheel is 26 inches in diameter. What is the bike wheel's diameter in millimeters (1 inch = 25.4 millimeters)? Determine t
Greeley [361]

Answer:

The answer is 660.4 millimeters in diameter.

Step-by-step explanation:

The wheel is 26 inches in diameter. An inch is 25.4 millimeters. 26 * 25.4 = 660.4

3 1
4 years ago
Please help! I need to tell whether x and y are in a proportional relationship and I need to write an equation that represents t
anyanavicka [17]

Step-by-step explanation:

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4 0
3 years ago
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Ruth found 37 tickets for $7. Please help Ruth by figuring out the ratio. (round to 2 decimal places)
Amanda [17]

Answer:

Ratio of ticket to its price is 1  :  0.189.

Step-by-step explanation:

Here, the cost of 37 tickets = $7

Let us find the unit cost of the ticket.

\textrm{Unit Price }  = \frac{\textrm{Total Price of n units}}{\textrm{n}}

\implies U = \frac{7}{37}=0.189

So, the unit price of each ticket = $0.189

Now, ratio of Each Ticket: Unit Price = 1 : 0.189

Hence, the ratio of ticket to its price is 1  :  0.189.

3 0
3 years ago
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