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adell [148]
2 years ago
13

1. Is 2/12 = 5/28 a true proportion?

Mathematics
2 answers:
Tomtit [17]2 years ago
7 0

Answer:

  • See below

Step-by-step explanation:

<h3>Step 1</h3>
  • 2/12 = 5/28
  • 2*28 = 12*5
  • 56 = 60

False equation

<h3>Step 2</h3>
  • No, because the cross products are not equal.
  • The proportion is not true, because 2/12 and 5/28 are not equivalent ratios.
Oliga [24]2 years ago
5 0
<h3>Solution (1):</h3>

<u>We know that:</u>

  • Given proportion: 2:12 = 5:28

Step-by step calculations:

<u>Simplify the LHS:</u>

  • 2:12 = 5:28
  • => 1:6 = 5:28

Remember:<em> (a:b = c:d) = (a x d = b x c)</em>

<u>Use cross multiplication:</u>

  • => 1:6 = 5:28
  • => 28 = 30 (False)
<h3>Solution (2):</h3>
  • No, because the cross products are not equivalent.
  • The proportion is not true, because 2/12 and 5/28 are not equivalent ratios.

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Answer: the second one

Step-by-step explanation:

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3 years ago
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mestny [16]
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3 years ago
3. Find the lengths of d<br> d<br> 15<br> 7<br> 6<br> 10
siniylev [52]

Answer:

15

Step-by-step explanation:

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4 0
2 years ago
Find the lateral area of the regular pyramid<br><br> L.A. =
Arisa [49]

Answer:

FOR REGULAR PYRAMID with those dimension.

L.A = 96

FOR HEXAGONAL PYRAMID with those dimension

L.A = 171.71

Step-by-step explanation:

Please the question asked for L.A of a REGULAR PYRAMID, but the figure is a HEXAGON PYRAMID.

Hence I solved for both:

FOR REGULAR PYRAMID

Lateral Area (L.A) = 1/2* p * l

Where p = Perimeter of base

P = 4s

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P = 24cm

l = slanted height

l = 8cm

L.A = 1/2 * 24 * 8

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FOR AN HEXAGONAL PYRAMID

Lateral Area = 3a √ h^2 + (3a^2) / 4

Where:

a = Base Edge = 6

h = Height = 8

L.A = 3*6 √ 8^2 + ( 3*6^2) / 4

L.A = 18 √ 64 + ( 3 * 36) / 4

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L.A = 18 √ 91

L.A = 18 * 9.539

L.A = 171.71

8 0
2 years ago
What are the zeros of the graphed function y = (x + 3)(x + 5)?
tensa zangetsu [6.8K]
Y=(x+3)(x+5)
0=(x+3)(x+5)
0=x+3
Subtract three on both sides
-3=x
0=x+5
Subtract five on both sides
-5=x
So, -3 and -5 are the zeros of the graphed function.
Hope I helped!
5 0
2 years ago
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