We see on the picture that :
When we go down one row, we add one horizontal and two diagonal cards.

In the first row we have 2 cards
In the second 2+3=5 cards
In the third 5+3=8 cards
etc.

General formula : in the n-th row from the top, we have $\boxed{ 2+(n-1)\cdot3\text{ cards}}$

5 0

3 years ago

The ratio of the perimeter of two similar polygons is 5:7. The area of the smaller polygon is 30 sq. cm. Find the area of the la

Debora [2.8K]

Answer:

42sq

Step-by-step explanation:

5:7

30 sq: x sq

30/5=6 sq for 1 of the ratio

6*7=42 sq for 7 of the ratio

4 0

2 years ago

Shawna’s book report must have a minimum of 500 words. She counted the number of words she wrote already and realized she still

AlladinOne [14]

500/4= 125
she has written 125 words and needs to write 375 more

4 0

2 years ago

Complete the square to solve the equation below.

sasho [114]

Hello there!

x² + x = 7/4
x² + - 7/4 = 0

Now we gonna use the quadratic formula to find x
a= 1
b=1
c = -1.75

x = -b+/-√b² -4ac all of them divide by 2a
x = -(1)+/-√(1)² - (4)(1)(-1.75) all of them divide by 2(1)
x= -1+/-√8 all of them divide by 2
x = -1/2 + √2 or x = -1/2 - √2

The correct option is option C

I hope that helps!

4 0

3 years ago