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3 years ago

9 squared + x squared = 15 squared

Mathematics

2 answers:

SSSSS [86.1K]3 years ago

6 0

Answer:

x = 72 i hope this helps :)

Step-by-step explanation:

given, $9^{2}$ + $x^{2}$ = $15^{2}$

simplify 81 + 2x = 225

subtract 81 from both sides 2x = 144

divide both sides by 2 x = 72

alisha [4.7K]3 years ago

5 0

Answer:

x=12

Step-by-step explanation:

9^2=81

15^2=225

225-81=144

√144=12

x=12

I hope this helps!

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In preparing a certain ointment, a pharmacist used 28.35 g of zinc oxide instead of the 31.1 g called for. Calculate the percent

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Answer: 9.70%

Step-by-step explanation:

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3 years ago

Fifty trees grow in a forest. Workers cut down 23 of the trees. Then they plant 38 new ones. After all the cutting and planting,

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Answer:

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From the question given:

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When 2(3/5 x + 2/3 y - 1/4 x -1 1/2 y + 3 )is simplified, what is the resulting expression?

vovangra [49]

Answer:

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Step-by-step explanation:

We need to simplify the expression: $2(\frac{3}{5}x+\frac{2}{3}y-\frac{1}{4}x-1\frac{1}{2}y +3)$

First we will solve terms inside the bracket

$2(\frac{3}{5}x+\frac{2}{3}y-\frac{1}{4}x-1\frac{1}{2}y +3)$

Converting mixed fraction $1\frac{1}{2} y$ into improper fraction, we get: $\frac{3}{2}y$

Replacing the term:

$2(\frac{3}{5}x+\frac{2}{3}y-\frac{1}{4}x-\frac{3}{2}y +3)$

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Now multiply 60 with each term inside the bracket

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Now, combine like terms

$2(36x-15x-90y+40y-180)\\2(21x-50y-180)$

Now, multiply all terms with 2

$42x-100y-360$

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