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Anuta_ua [19.1K]
3 years ago
10

can sumone heeeeeeelp meee with thiiiis its homework and im about to give uup like this just question 1 and im already tired ple

eaaseeeee

Mathematics
2 answers:
Fynjy0 [20]3 years ago
4 0
Answer: C— 9 m

Steps:
a^2 + b^2 = c^2
12^2 + b^2 = 15^2
144 + b^2 = 225
b^2 = 81
b = 9
Schach [20]3 years ago
4 0

Answer:

C.  9 m

Step-by-step explanation:

The Pythagorean theorem says

leg_{1} ^{2}  +  leg_{2} ^{2}  =  hyp^{2}

Let the third side, which is a leg, = x

12^{2} + x^{2}  =  15^{2}

144 + x^{2} = 225

x^{2}  = 81\\x = \sqrt{81}  = 9

C.  9 m

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The sale price is 70% of the original price, so the discount would be 30% (100-70= 30)

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To make a box and whisker plot, you need to draw a number line that would be able to represent all the values in the data (look at your lowest and highest numbers).

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Complete the square to transform the expression x2 + 4x + 2 into the form a(x − h)2 + k.
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Step-by-step explanation:

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Suppose that the functions r and a are defined for all real numbers x as follows. r(x)=2x-1 S(x)=5x write the expressions for (r
NeTakaya

\boxed{(r-s)(x)=-3x-1} \\ \\ \boxed{(r\cdot s)(x)=10x^2-5x} \\ \\ \boxed{(r+s)(-2)=-15}

<h2>Explanation:</h2>

In this exercise, we have the following functions:

r(x)=2x-1 \\ \\ s(x)=5x

And they are defined for all real numbers x. So we have to write the following expressions:

First expression:

(r-s)(x)

That is, we subtract s(x) from r(x):

(r-s)(x)=2x-1-5x \\ \\ Combine \ like \ terms: \\ \\ (r-s)(x)=(2x-5x)-1 \\ \\ \boxed{(r-s)(x)=-3x-1}

Second expression:

(r\cdot s)(x)

That is, we get the product of s(x) and r(x):

(r\cdot s)(x)=(2x-1)(5x) \\ \\ By \ distributive \ property: \\ \\ (r\cdot s)(x)=(2x)(5x)-(1)(5x) \\ \\ \boxed{(r\cdot s)(x)=10x^2-5x}

Third expression:

Here we need to evaluate:

(r+s)(-2)

First of all, we find the sum of functions r(x) and s(x):

(r+s)(x)=2x-1+5x \\ \\ Combine \ like \ terms: \\ \\ (r+s)(x)=(2x+5x)-1 \\ \\ (r+s)(x)=7x-1

Finally, substituting x = -2:

(r+s)(-2)=7(-2)-1 \\ \\ (r+s)(-2)=-14-1 \\ \\ \boxed{(r+s)(-2)=-15}

<h2>Learn more: </h2>

Parabola: brainly.com/question/12178203

#LearnWithBrainly

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