Pyramid Surface Area = (½ * Perimeter of Base * Slant Height) + Base Area
The sides of the triangle are 3x, 4x and 5x
3x + 4x + 5x = 90
12x = 90
x = 90/12
x = 7.5
first side = 3x = 3 * 7.5 = 22.5 cm
second side = 4x = 4 * 7.5 = 30 cm
third side = 5x = 5*7.5 = 37.5 cm
I think the answer is Beth can make 8 dozen gingerbread men
Step-by-step explanation:
- You can use the distributive formula to answer:
a(b - c) = ab - ac
2(3x - 1) - 3x + 4
6x - 2 - 3x + 4
- Simplify by the common terms:
3x + 2
That is the answer
Hope that helped!!
~A̷l̷i̷s̷h̷e̷a̷♡
Answer:
81 900 000 000 000 is 8.19 × 10¹³
Step-by-step explanation:
Write the first number 8.
Add a decimal point after it: 8.
Now count the number of digits after 8. There are 13 digits.
So, in standard form: 81 900 000 000 000 is 8.19 × 10¹³