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Reptile [31]
3 years ago
10

May someone help me with these 2 again

Mathematics
1 answer:
cestrela7 [59]3 years ago
3 0

Answer:

1. 180

2. x = 31

Step-by-step explanation:

1. the sum of the interior angles of every triangle is always 180

2. using what we know from problem 1, we can create an equation:

x + 10 + 2x - 5 + 2x + 20 = 180

add like terms: 5x + 25 = 180

subtract 25 from both sides: 5x = 155

divide both sides by 5: x = 31

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Fernando invested money in a 4-yr CD (certificate of deposit) that returned the equivalent of 5.2% simple interest. He invested
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Answer: $5000; $2000

Step-by-step explanation:

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T = time

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Since rate = 5.2%

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Since he invested $3000 less in a 18-month CD, Let the money in the 18-month CD be represented by (y - $3000).

Then, S.I = [(y - $3000) × 3 × 1.5]/100

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We then equate the two simple interest together. This will be:

= (y × 5.2 × 4)/100 + (y - $3000) × 3 × 1.5]/100 = $1130

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The money invested in 4-yr CD = $5000

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3 years ago
How do you solve fractions and multiplication in algebraic, ex:1/3× -4​
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x=12

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