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sleimanabir
09.07.2019 •
Mathematics
Jane is saving her money in order to purchase a new racing bike. she initially saves $3 and plans to double the amount she saves each month. the bike jane wants is $1,536 at the local bike shop. which equation represents this situation, and after how many months, t, will jane have enough money to purchase the bike? a, 3(2)t = 1,536; t = 11 b, 3(1.2)t = 1,536; t = 35 c, (3 · 2)t = 1,536; t = 9 d, 3(2)t = 1,536; t = 9
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Ответ:
Hence, option: D is true.
D) 3×(2)^t = 1,536; t = 9
Step-by-step explanation:
Jane is saving her money in order to purchase a new racing bike. She initially saves $3 and plans to double the amount she saves each month.
he bike Jane wants is $1,536 at the local bike shop.
The equation that represents this situation, and after how many months, t, will Jane have enough money to purchase the bike is:
D) 3×(2)^t = 1,536; t = 9
since in the first month the cost is:
in next month the cost is:
in t=3 months the expression is:
Hence in general we say:
Hence,
Hence, option: D is true.
D) 3×(2)^t = 1,536; t = 9
Ответ:
5x-6
Step-by-step explanation:
f(x) = 2x + 3
g(x) = 3x - 9
f(x) + g(x) = 2x + 3 + 3x-9
= 5x-6