Can someone me with these problems? the majority of them i have answers but i don't understand them.
what is the area of the triangle with a base of 5 1/2 cm and a height of 3 1/2 cm?
my answer - 11 1/2
919÷ 2
round to the nearest whole
my answer-?
what is the area of a parallelogram with a base of 14.5 m and a height of 21 m?

the cafeteria sold 200 grilled cheese sandwiches, 100 tacos, and 150 grilled chicken salads. what is the ratio in simplest terms of grilled chicken salads sold to the total number of lunches sold?
my answer- 1: 3
what is the ratio of odd to even digits in the following number:
7,208,631
my answer- 3: 4

given that one ton is equal to 2000 pounds, what is 5 tons?
my answer- 400 or 1000
a table measures 3 feet across. how many inches is this?
my answer-36

The corresponding answers to the questions are  9.625 cm² , 459, 304.5m², 1 : 3 , 3:4 , 10,000 pounds , 36 inches.

Step-by-step explanation:

1.

Area of triangle = 0.5 x base length x height

Here base length = 5.5cm and height = 3.5cm

So area will be 0.5 x 5.5 x 3.5 cm² = 9.625 cm²

2.

919/2 rounding off to nearest whole

We know that the value of 919/2 = 459.5 .

So the nearest whole number value to which it can be rounded off is 459.

3.

We know that area of parallelogram is base length x height

Here, base length =14.5m and height = 21m

So area = 14.5 x 21 m² = 304.5m²

4.

No. of grilled cheese sandwiches sold = 200

No. of tacos sold                                     = 100

No. of grilled chicken salads sold          = 150

Total lunches sold                                   = 200 + 100 + 150 = 450

So, ratio of chicken salads to lunches sold is 150 : 450 = 1 : 3

5.

Given number : 7,208,631

Odd digits here - 7,3,1 - 3 digits

Even digits here - 2,0,8,6 - 4 digits

So, ratio of odd digits to even digits is 3:4

6.

One ton = 2000 pounds

So 5 tons = 5 x ( 1 ton) = 5 x 2000 pounds = 10,000 pounds

7.

Table length = 3 feet

We know that 1 foot = 12 inches

So table length = 3 foot = 3 X 12 inches = 36 inches

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )