Answer:
mary has 135 coins.
Step-by-step explanation:
let the coins that john has be x
and coin mary than = 3x
according to the question equation is
x + 3x = 180
4x = 180
x = 180 / 4
x = 45
coins mary has = 3x
=3*45
=135
Answer:
#1-
The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic trends. The seven rows of the table, called periods, generally have metals on the left and nonmetals on the right. The columns, called groups, contain elements with similar chemical behaviours. Six groups have accepted names as well as assigned numbers: for example, group 17 elements are the halogens; and group 18 are the noble gases. Also displayed are four simple rectangular areas or blocks associated with the filling of different atomic orbitals. #2-118
Step-by-step explanation:
Hello there! To find the percentage of students that voted, all you have to do is divide the number of students that voted by the amount of eligible voters and multiply it by 100. 1,550/2,000 is 0.775. 0.775 * 100 is 77.5. There . 77.5% of students voted. The answer is C: 77.5%.
Answer:
Step-by-step explanation:
The pillow is cylindrical. To determine the amount of fabric needed for the pillow, we would apply the formula for determining the total surface area of a cylinder which is expressed as
Total surface area = 2πr² + 2πrh
Where
r represents the radius of the cylinder.
h represents the height of the cylinder.
π is a constant whose value is 3.14
From the information given,
radius = 5 inches
Height = 18 inches
Therefore,
Area = (2 × 3.14 × 5²) + 2 × 3.14 × 5 × 18
Area = 157 + 565.2 = 722.2
Amount of fabric needed is
722.2 square inches
