The number of half page advertisements that Michael purchased is 4 while the full page advertisements is 11.
Let the number of half page ads be represented by h
Let the number of full page ads be represented by f.
Total number of advertisements = 15
h + f = 15 ....... (i)
h = 15 - f
Therefore, the system of equations to represent the situation will be:
60h + 100f = 1340 ........ (ii)
Put the value of h into equation (ii)
60(15 - f) + 100f = 1340
900 - 60f + 100f = 1340
Collect like terms
100f-60f = 1340-900
40f = 440
f = 11
The number of full-page advertisements that Michael purchased is 11.
Since h + f = 15
h + 11 = 15
h = 15 - 11
h = 4
The number of half page advertisements that Michael purchased is 5.
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Answer: Bladder
Step-by-step explanation:
The walls of the bladder contain very few blood vessels and are lined with guanine crystals, which make them impermeable to gases. By adjusting the gas pressurising organ using the gas gland or oval window the fish can obtain neutral buoyancy and ascend and descend to a large range of depths.