Please help with this

Mathematics

1 answer:

aleksley [76]3 years ago

7 0

Answer:

4.8 if you round it to the tenths place

the whole answer is 4.887739763939

Step-by-step explanation:

You need to find the hypotenuse..which is 's'

Following the rule a^2 + b^2 = c^2

It leads us with 2.5^2 + 4.2^2 = c^2

Therefore 6.25 + 17.64 =c^2

6.25 + 17.64= 23. 89

You square root the numbers and..

$\sqrt{23.89} = 4.8$

You might be interested in

The length of a rectangle is nine inches more than its width. Its area is 486 square inches. Find the width and length of the re

Elan Coil [88]

Answer:

width: 18 in
length: 27 in

Step-by-step explanation:

The relations between length (L) and width (W) are ...

W +9 = L

LW = 486

Substituting gives ...

(W+9)W = 486

W^2 +9W -486 = 0 . . . put in standard form

(W +27)(W -18) = 0 . . . . factor

W = 18 . . . . the positive solution

The width of the rectangle is 18 inches; the length is 27 inches.

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<em>Comment on factoring</em>

There are a number of ways to solve quadratics. Apart from using a graphing calculator, one of the easiest is factoring. Here, we're looking for factors of -486 that have a sum of 9.

486 = 2 × 3^5, so we might guess that the factors of interest are -2·3² = -18 and 3·3² = 27. These turn out to be correct: -18 +27 = 9; (-18)(27) = -486.