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2 years ago

Find the value of x I need help

Mathematics

1 answer:

astra-53 [7]2 years ago

3 0

Answer:

x =35

Step-by-step explanation:

The sum of the angles of a triangle add to 180

x+10 +x + 3x-5 = 180

Combine like terms

5x+5 = 180

Subtract 5 from each side

5x+5-5 =180-5

5x = 175

Divide by 5

5x/5 =175/5

x =35

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Maggie's brother is 3 years younger than twice her age. the sum of their ages is 24. how old is maggie?

Pepsi [2]

Let x=Maggie's age.

2x-3= brother's age

x+2x-3=24

3x-3=24

3x-3+3=24+3

3x=27

3x/3=27/3

x=9

hope it helps

6 0

3 years ago

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3 years ago

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mixer [17]

Answer:

Step-by-step explanation:

3 0

3 years ago

Evaluate x – 2y if x = –3 and y = –6. 1. 15 2. 9 3. -9 4. -15

max2010maxim [7]

Answer:

-15

Step-by-step explanation:

-3 - 2(-6)

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6 0

3 years ago

Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x. (2 points)

n200080 [17]

Given:

$f(x)=\dfrac{8}{x}$

$g(x)=\dfrac{8}{x}$

To find:

Whether f(x) and g(x) are inverse of each other by using that f(g(x)) = x and g(f(x)) = x.

Solution:

We know that, two function are inverse of each other if:

$f(g(x))=x$ and $g(f(x))$

We have,

$f(x)=\dfrac{8}{x}$

$g(x)=\dfrac{8}{x}$

Now,

$f(g(x))=f(\dfrac{8}{x})$ $[\because g(x)=\dfrac{8}{x}]$

$f(g(x))=\dfrac{8}{\dfrac{8}{x}}$ $[\because f(x)=\dfrac{8}{x}]$

$f(g(x))=8\times \dfrac{x}{8}$

$f(g(x))=x$

Similarly,

$g(f(x))=f(\dfrac{8}{x})$ $[\because f(x)=\dfrac{8}{x}]$

$g(f(x))=\dfrac{8}{\dfrac{8}{x}}$ $[\because g(x)=\dfrac{8}{x}]$

$g(f(x))=8\times \dfrac{x}{8}$

$g(f(x))=x$

Since, $f(g(x))=x$ and $g(f(x))$ , therefore, f(x) and g(x) are inverse of each other.

6 0

3 years ago