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Natali [406]
2 years ago
14

Simplify the expression7x-5(x-3)-xplease help me ​

Mathematics
2 answers:
vfiekz [6]2 years ago
8 0

Step-by-step explanation:

1) 7x - 5x + 15 - x

2) 2x + 15 -x

3) x + 15

ValentinkaMS [17]2 years ago
6 0

Answer:

x+15

Step-by-step explanation:

pemdas first you do parenthesis and since yo odn't know x then you move on to exponents and if thats not in there then you go to multiplication and any number thats next toa parenthesis without a sign in between them has to be multiplied so -5 times 5 equals -5x and you also have to multiply -5 by negative 3 which is +15 because negative times negative equals positive and -x is still in there so since it's only one x it's equal to -1x and -1x +-5x equals -6x and now 7x-6x equals x+15

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wyatt opend a savings account 4 years ago. the account earns 4%interest compounded quarterly if the current balance is $1,000.00
Doss [256]

Answer:

He deposited initially $852.82

Step-by-step explanation:

The rule of the compound interest is A=P(1+\frac{r}{n})^{nt}, where

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  • P is the initial amount
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  • n is the period of the time
  • t is the time

∵ Wyatt opened a savings account 4 years ago

∴ t = 4

∵ The account earns 4% interest compounded quarterly

∴ r = 4% = 4 ÷ 100 = 0.04

∴ n = 4 ⇒ compounded quarterly

∵ The current balance is $1,000.00

∴ A = 1,000

→ Substitute these values in the rule above to find P

∵ 1,000 = P(1+\frac{0.04}{4})^{4(4)}

∴ 1,000 = P(1+0.01)^{16}

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→ Divide both sides by  (1.01)^{16}

∴ 852.8212622 = P

→ Round it to the nearest cent (2d.p)

∴ P = 852.82

∴ He deposited initially $852.82

4 0
3 years ago
On the basis of extensive tests, the yield point of a particular type of mild steel-reinforcing bar is known to be normally dist
KiRa [710]
1) The formula used for determining the confidence interval is
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error of mean
8439 +/- 1.645 * 100/sqrt 25
8439 +/- 1.645 * 20
8439 +/- 32.9
2) The only difference in this case is finding the critical value i.e., z-score corresponding to 92% confidence which is 1.75 approximately
Then the confidence interval is
8439 +/- 1.75 * 100/sqrt 25
8439 +/- 1.75 * 20
8439 +/- 35
Lower limit is 8439 - 35 = 8404
The upper limit is 8439 + 35 = 8474
6 0
3 years ago
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Anni [7]

Answer: B

Step-by-step explanation: the other ones are wrong.

4 0
3 years ago
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Answer:

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7 0
4 years ago
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Alex_Xolod [135]

Answer:

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Step-by-step explanation:

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3 years ago
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