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3 years ago

Find the value of x and y.

Mathematics

1 answer:

ValentinkaMS [17]3 years ago

3 0

X is equal to 100 and Y is equal to 16

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How do I solve this equation?

Gnom [1K]

$2x(4-x)^{-1/2}-3(4-x)^{1/2}=(4-x)^{-1/2}\bigg(2x-3(4-x)\bigg)$

We effectively rewrite the equation as

$\dfrac{5x-12}{(4-x)^{1/2}}=0$

In order for the LHS to be defined, we need to restrict $4-x>0$ , or $x$ . Now, the LHS will vanish when the numerator is 0, which happens for

$5x-12=0\implies5x=12\implies x=\dfrac{12}5$

This value is indeed smaller than 4, so the solution is $x=\dfrac{12}5$ .

8 0

3 years ago

I need help plzz!! Just box number 4, TY

nydimaria [60]

12.36% I think sorry if its wrong ;-;

3 0

3 years ago

Evaluate the following expression when x = -5 and y = 25.

antoniya [11.8K]

Answer:

Step-by-step explanation:

5÷5x and 25÷5

1 × 5

your answer is 5

8 0

3 years ago

PLEASEEEEEEEEEEEEEEEE HELPPPPPPPPPPPPPPPPPPPPPPP

ch4aika [34]

Answer:

$-\dfrac{3}{5}$

Step-by-step explanation:

1. Find the numerator:

$\dfrac{1}{3}-\dfrac{5}{6}=\dfrac{1\cdot 2}{3\cdot 2}-\dfrac{5}{6}=\dfrac{2}{6}-\dfrac{5}{6}=\dfrac{2-5}{6}=-\dfrac{3}{6}=-\dfrac{1}{2}.$

2. Simplify the fraction:

$\dfrac{-\frac{1}{2}}{\frac{5}{6}}=-\dfrac{1}{2}\cdot \dfrac{6}{5}=-\dfrac{3}{5}.$

7 0

3 years ago

How do you find the amplitude of a sine or cosine wave

avanturin [10]

Let's start with the basic sine function, f(t) = sin(t). This function has an amplitude of 1 because the graph goes one unit up and one unit down from the midline of the graph. This function has a period of 2π because the sine wave repeats every 2π units

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3 years ago