3 years ago

Help me with this pls!

Mathematics

1 answer:

frozen [14]3 years ago

3 0

20cm is the hight and the pencil is 20

You might be interested in

447 = -6 + 3(n - 1)

Irina-Kira [14]

After solving the equation: $447 = -6 + 3(n - 1)$ the value of n is $n=152$

Step-by-step explanation:

We need to solve the equation: $447 = -6 + 3(n - 1)$ and find value of n

Solving:

$447 = -6 + 3(n - 1)$

Multiply 3 with terms inside the bracket

$447 = -6 + 3n -3\\447=3n-9$

Adding 9 on both sides

$447+9 =3n-9+9\\456=3n\\=> 3n=456$

Divide both sides by 3

$n=456/3\\n=152$

So, after solving the equation: $447 = -6 + 3(n - 1)$ the value of n is $n=152$

Keywords: Solving Equations

Learn more about Solving Equations at:

#learnwithBrainly

8 0

3 years ago

In a rhombus ABCD, m∠A = 31°. Point O is a point of intersection of diagonals. Find the measures of the angles of triangle ΔBOC.

MissTica

Check the picture below.

keeping in mind that the diagonals in a rhombus always meet at right-angles, thus all angles at point O are all right-angles.

now, notice that the AC angle bisector, cuts the angle at A in two equal halves, and if you look at the triangle BOC, there is a 15.5° angle, and a right-angle, and well, you already know what the last one is.