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3 years ago

Sion 3x-2y for X = 7 and y = 3

Mathematics

1 answer:

ddd [48]3 years ago

6 0

To find the value of the expression, plug in 7 for x and 3 for y.
You have 3(7) - 2(3)
Simplify to 21 - 6
Your final answer is 15.

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4/18 is closest to: 1/2 or 1 whole

Anika [276]

Answer:

1/2, since 1 whole is 18/18 and 1/2 is equal to 9/18

Step-by-step explanation:

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Z=Xm+n-p,solve for x

timama [110]

z=xm+n-p

We need to isolate x to one side I will do that on the left side so it looks cleaner, therefore I will first flip the equation.

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3 years ago

If sin42 degrees = 2/3 then cos48 degrees = what? <br> If tan20.5= 3/8, the tan69.5= what?

Anna11 [10]

Big ifs, question writers. These are of course approximations.

The "co" in cosine comes from complementary angles. It means since

$42^\circ + 48 ^\circ = 90^\circ$

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Similarly,

$20.5^\circ +69.5^\circ = 90^\circ$

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3 years ago

Find the value of y.

Phoenix [80]

$\boxed{y=6\sqrt{3}}$

<h2>Explanation:</h2>

For a better understanding of the problem I've built up two triangles from the given triangular shape. So these two triangles are similar. Therefore, we can solve this problem by using ratios and corresponding sides in this way:

$\frac{x}{3}=\frac{12}{x} \\ \\ x^2=36 \\ \\ x=\sqrt{36} \\ \\ x=6$

But our goal is to find y. Let's call w the height of the small triangle, then:

$w=\sqrt{6^2-3^2}=3\sqrt{3}$

Applying the concept of ratios again:

$\frac{y}{w}=\frac{x}{3} \\ \\ y=w \left(\frac{x}{3}\right) \\ \\ y=3\sqrt{3}\left(\frac{6}{3}\right) \\ \\ \boxed{y=6\sqrt{3}}$

<h2>Learn more:</h2>

Right triangle: brainly.com/question/10684799

#LearnWithBrainly

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What's 235 divided by 40

Alik [6]

5.875 is the answer

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