2 years ago

Which expression represents 4 times the number r? A. 4 – r B. 4r C. 4 + r D. 4/r

Mathematics

2 answers:

GREYUIT [131]2 years ago

6 0

The exp. for Four times r = 4r

Crank2 years ago

5 0

D. 4/r or c.4+r ohhjhd you h

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Natasha_Volkova [10]

Answer:

D. Neither

Step-by-step explanation:

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3 years ago

The measure of angle ABD is (0.15x+65) and the measure of angle CBD is(0.1x+28) . Find the value of x.

Andrej [43]

Answer:

x = 348

Step-by-step explanation:

The measure of angle ABD is (0.15x+65) and the measure of angle CBD is(0.1x+28) . Find the value of x.

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2 years ago

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Step-by-step explanation:

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3 years ago

An isosceles triangle has a perimeter of 18 cm. Find a function that models its area A in terms of the length of its base b.

IgorLugansk [536]

So.... notice the picture below

now, we know what the "height" or "altitude" is
now, we also know the perimeter is 18cm

so, k + k + b = 18
or 2k + b = 18
thus $\bf k=\cfrac{18-b}{2}$

so... one can say that $\bf \textit{area of a triangle}=A=\cfrac{1}{2}bh\qquad 
\begin{cases}
b=b
\\\\
h=\sqrt{k^2-\left( \frac{b}{2} \right)^2}
\\\\
h=\sqrt{k^2-\frac{b^2}{4}}\\
--------------\\
k=\frac{18-b}{2}\qquad thus\\
--------------\\
h=\sqrt{\left( \frac{18-b}{2} \right)^2-\frac{b^2}{4}}
\end{cases}\\\\
-----------------------------\\\\
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and you can simplify it if you wish.. not sure you have to

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3 years ago

What fraction is equal to 30/6

anzhelika [568]

5/1, 15/3, and 10/2 are all valid answers to that question.

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3 years ago

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