we will have to buy 12.
<h3>How to solve?</h3>
We know to begin with that for x candy bards:
x / 10 = 0.89; x = 8.90
We are trying to ascertain how many bars (y) must be added to this to amount to have an average of 0.80. This is represented:
(8.9 + 0.72y) / (10 + y) = 0.8
8.9 + 0.72y = 0.8 (10 + y)
8.9 + 0.72y = 8 + 0.8y
8.9 – 8 = 0.8y - 0.72y
0.9 = 0.08y
y = 0.9 / 0.08 = 11.25
However, since we cannot have a partial amount of candy bars, we will have to buy 12.
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Answer:
120
Step-by-step explanation:
the pic was blury but the bigger rectangle seemed to be 10 by 8 so you multiply 10×8=80. the smaller rectangle is 5 by 8 so you multipy 5×8=40. then add 40+80=120
Answer:
<h2>( 2 , 1 )</h2>
Step-by-step explanation:
2x - 2y = 2
<u>5</u><u>x</u><u> </u><u>+</u><u> </u><u>2</u><u>y</u><u> </u><u>=</u><u> </u><u>1</u><u>2</u>
7x = 14
<h3>
x = 2</h3>
(2x - 2y = 2)-5
<u>(5x + 2y = 12)</u><u>2</u>
-10x + 10y = -10
<u> 10x + 4y = 24</u>
14y = 14
<h3>
y = 1</h3>
x = 2
y = 1
(2,1)
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