when you have a problem like the one above you have to put parentheses to the negative numbers either to add or subtract them, there is where the sign rule comes in

6 0

3 years ago

Read 2 more answers

Use 3.14 for the value of , and round your answers to two decimal places, where applicable. If the diameter of a circle is 15 m,

sergejj [24]

if the diameter of a circle is 15, its radius is half that or 7.5.

$\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=7.5 \end{cases} A=\pi (7.5)^2\implies A=56.25\pi \implies \stackrel{\pi =3.14}{A=176.625}$

7 0

2 years ago

(x + y + 3)(x + y - 4) multiplying polynomials

Yuliya22 [10]

X^2 + 2xy + -x + y^2 + -y + -12

4 0

3 years ago