3 years ago

Can somebody please help me

1 answer:

6 0

Pictures of a figure with rotational symmetry and an order of 4 & a<span> figure with 3 lines of symmetry are in the attachments but i am not sure about the 3rd one. I think every polygon has a line of symmetry or a rotational symmetry but i am not sure..

A square has a rotational symmetry with an order of 4.

A triangle has 3 lines of symmetry :)</span>

You might be interested in

Good at math & need points? help!!

Greeley [361]

Answer:

Step-by-step explanation:

5 0

3 years ago

Solve.<br> y=x - 7<br> 5+2y=7

lesantik [10]

Answer:

$\huge\boxed{x=8;\ y=1\to(8;\ 1)}$

Step-by-step explanation:

$\left\{\begin{array}{ccc}y=x-7&(1)\\5+2y=7&(2)\end{array}\right\\\\\text{Substitute (1) to (2) and solve for x:}\\\\5+2(x-7)=7\qquad\text{use the distributive property}\\\\5+(2)(x)+(2)(-7)=7\\\\5+2x-14=7\\\\2x+(5-14)=7\\\\2x-9=7\qquad\text{add 9 to both sides}\\\\2x-9+9=7+9\\\\2x=16\qquad\text{divide both sides by 2}\\\\\dfrac{2x}{2}=\dfrac{16}{2}\\\\\boxed{x=8}$