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3 years ago

The area is ___ square meters. UH HELP I need the steps if anyone can!?

Mathematics

1 answer:

marysya [2.9K]3 years ago

7 0

ANSWER:
27m squared

STEP BY STEP:
-Find the area of the rectangle (6*3), which is 18
-Find the area of the triangle (6*2)/2=6
-The second triangle (3*3)/2=3
-Add all the answers up (27)
-Add the label (meters squared)
- your answer is 27m squared

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Find the perimeter of a square whose sides are 7.

allochka39001 [22]

Hey there,

Your question states: <span>Find the perimeter of a square whose sides are 7.

When finding the perimeter, we need to multiply each side because it is a square. So 7 times 4 would be 28

~Jurgen</span>

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3 years ago

What is the inverse of the function f(x)=x/5-2

umka2103 [35]

Answer:

$\huge\boxed{\sf f^{-1}(x)=5x+10}$

Step-by-step explanation:

<h3>Given function:</h3>

$\displaystyle f(x)=\frac{x}{5} -2$

Put f(x) = y

$\displaystyle y=\frac{x}{5} -2$

Swap x and y

$\displaystyle x = \frac{y}{5} -2$

Now, solve for y

$\displaystyle x = \frac{y}{5} -2$

Add 2 to both sides

$\displaystyle x + 2 =\frac{y}{5}$

Multiply 5 to both sides

$5(x+2)=y$

Distribute

$5x + 10 =y$

Put y = f⁻¹(x)

$\boxed{f^{-1}(x)=5x+10}$

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2 years ago

A sample of radium has a weight of 1.5 mg and decays

Oliga [24]

Answer: $(b)$

Step-by-step explanation:

Given

Initial mass of radium is $A_o=1.5\ mg$

It decays by half every 6 years i.e. $T_{\frac{1}{2}}=6$

For radioactive decay, sample at any time is given by

$\Rightarrow A=A_o2^{-\dfrac{t}{T_{\frac{1}{2}}}}$

Insert the values

$\Rightarrow A=1.5\cdot 2^{\dfrac{-t}{6}}\\\\\Rightarrow A=1.5\cdot \left(\dfrac{1}{2}\right)^{\dfrac{-t}{6}}\\\\\Rightarrow A=1.5\cdot (0.5)^{\dfrac{t}{6}}$