Five less than tvice a number is equal to one half the difference of three times the number and 13. Find the number.

Mathematics

1 answer:

lora16 [44]3 years ago

7 0

I think it's -3

$2x - 5 = \frac{1}{2} (3x - 13)$

$4x - 10 = 3x - 13$

$x = - 3$

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If RV = x+6, US = 5x-9, and RS = 11, find VT and ST

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The values of VT and ST for the given rectangle are 13 and 23.56 respectively.

The given parameters:

RV = x + 6
US = 5x - 9
RS = 11

The value of VT and ST is calculated as follows;

from the given diagram we can conclude the following;

2RV = RT = US

$2(x + 6) = 5x - 9\\\\2x + 12 = 5x - 9\\\\12 + 9 = 5x - 2x\\\\21=3x\\\\x = 7$

RT = 2RV = 2VT = 2(7 + 6) = 26

VT = ¹/₂ x 26

VT = 13

The value of ST can be determined from Pythagoras theorem as follows;

$ST = \sqrt{RT^2 - RS^2} \\\\ST = \sqrt{26^2 - 11^2} \\\\ST = 23.56$

Learn more about Pythagoras theorem here: brainly.com/question/12306722

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