<span>Mrs. Kennedy is buying 315 pencils
But pencils are sold in boxes of 10
How can she use rounding in this given situation
315 = number of pencil she wants to buy
10 = number of pencils per box
=> 315 / 10
=> 31.5, Since she needs 315 pencils, she need to buy 31 boxes and half.
However, they are not selling half box. So Mrs. Kennedy needs to round off the
number of pencils to buy to its nearest value.
Since the value next to the decimal points is 5, Mrs. Kennedy will round up.
Therefore, Mrs. Kennedy will now buy 32 boxes of pencils or equals to 320
pencils.</span>
X+y=6
x-y=4
using these equations we solve for either x or y in one and plug it into that variable in the other equation.
x=y+4 so y+4+y=6 so 2y=2 so y=1
now using y=1 put into first equation. x+1=6 so x=5
so we know our graph goes through the coordinate point (5,1) then just make an x table and use some values to find the corresponding y coordinate and then do that for at least three points or more if needed to find the best fit for graph. Hope this helps walk you through it! Any questions please just ask! Thank you!
Answer:
Since the required energy is less than the produced energy, the power is sufficient to light 9 light bulbs.
Step-by-step explanation:
A power plant has 4 tons of coal. A ton produces 2,460 kilowatt hours of electricity.
It takes 876 kilowatt hours of electricity to power a 100-watt light bulb for a year.
We have to light 9 bulbs a year.
So the required energy = 9 876 = 7884 kilowatt hours.
Power plant produces 4 tons of coal, so power = 4
= 9840 kilowatt hours.
Since the required energy is less than the produced energy, the power is sufficient to light 9 light bulbs.