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Allisa [31]
3 years ago
14

Help and I'll follow you ​

Mathematics
1 answer:
My name is Ann [436]3 years ago
7 0

Answer:

12 nickels and 9 dimes

Step-by-step explanation:

1/ We have: n + d = 21 <=> d = 21 - n or opposite (n = 21 - d)

2/ We have: 0.05n + 0.10d = 1.50 and then we will put 1/ into 2/

=> 0.05n + 0.10(21 - n) = 1.50

=> 0.05n + 2.1 - 0.1n = 1.5

=> -0.05n = -0.6

=> n = 12

Nevertheless, d = 21 - n = 21 - 12 = 9

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3 years ago
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8 0
3 years ago
Please help me I’m super confused on this problem!
Lorico [155]

Answer:

m < amc = 54°

Step-by-step explanation:

< amb and < bmc are complementary angles whose sum equals 90°.

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< amb + < bmc = < amc

< 2x° + (x + 9)° = 90°

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2x° + x° + 9° = 90°

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