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Gre4nikov [31]
3 years ago
11

2 times the sum of a number and 9 equals 4​

Mathematics
1 answer:
ratelena [41]3 years ago
4 0

Answer

Step-by-step explanation:

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"take a number x, double it and then take that result away from 10"<br><br>Write as an expression
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Word Problem:

Take a number, <em>x</em>, double it and then take that result away from 10.

Expression:

10-(2x)

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3 years ago
Douglas invests money in two simple interest accounts. He invests three times as much in an account paying 14% as he does in an
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Douglas invested $ 1300 altogether

<em><u>Solution:</u></em>

Let x represent the amount invested in the account paying 14% interest.

Let y represent the amount invested in the account paying 5% interest

He invests three times as much in an account paying 14% as he does in an account paying 5%

Which means,

x = 3y

<em><u>The simple interest is given by formula:</u></em>

S.I = \frac{p \times n \times r}{100}

Where,

"p" is the principal

"n" is the number of years

"r" is the rate of interest

<em><u>He earns $152.75 in interest in one year from both accounts combined</u></em>

Therefore,

Combined S.I = 152.75

n = 1 year

<em><u>Considering the account earning 14% interest:</u></em>

S.I = \frac{3y \times 14 \times 1}{100}\\\\S.I = 0.42y

<em><u>Considering the account earning 5% interest:</u></em>

S.I = \frac{y \times 5 \times 1}{100}\\\\S.I = 0.05y

<em><u>Since, Combined S.I = 152.75</u></em>

Therefore,

0.42y + 0.05y = 152.75

0.47y = 152.75

Divide both sides by 0.47

y = 325

Therefore,

x = 3y

x = 3(325)

x = 975

<em><u>how much did he invest altogether?</u></em>

Amount invested together = x + y = 975 + 325 = 1300

Thus he invested $ 1300 altogether

3 0
3 years ago
​ Find the output, h, when the input, x, is - 18.<br><br> ​ h=17+ x/6
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Answer:

h = 20

Step-by-step explanation:

h = 17 + x/6

h = 17 + (18) / 6

h = 17 + 3

h = 20

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2 years ago
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D, B, and A are collinear. Yes they are coplanar because they all lay on the same plane. And I don’t understand the last question
3 0
3 years ago
I REALLY NEED HELP
g100num [7]
Because poop lol

Poop lol = 3.14

If 3.24= Pi then when I eat a peace of pie I eat 3.14
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