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kow [346]
4 years ago
10

Bob has one sister.

Mathematics
2 answers:
Kobotan [32]4 years ago
8 0

Answer:

Bob is 36

sister is 40

Step-by-step explanation:

76-4=72

72/2=36

Murrr4er [49]4 years ago
3 0

Answer:

sister is 52

bob is 24

Step-by-step explanation:

Let S = sisters age and B = Bob's age

Bob's sister is 4 years older than twice Bob's age:

mathematically : S = 4 + 2B ..... eq1

the sum of their ages is 76

mathematically : S + B = 76 .... eq 2

substituting eq 1 into eq2,

S + B = 76

(4+2B) + B = 76

4 + 3B = 76  (subtract 4 from both sides)

3B = 76 -4

3B = 72  (divide both sides by 3)

B = 72/3 = 24 (answer)

substitute value of B into equation 1

S = 4 + 2B

S = 4 + 2(24)

S = 4 + 48

S = 52 (answer)

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<h2><u>D. line</u></h2>

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3 years ago
Four times a number is three times the difference of that number and one
andrey2020 [161]

Answer: the number is -3

Step-by-step explanation:

Four times a number is three times the difference of that number and one

Let the number be x. Four times the number means 4×x = 4x

three times the difference of that number and one. This means

Difference of the number and one is (x-1). Three times the difference of the number and one would be 3(x-)

Four times a number = three times the difference of that number and one. Therefore,

4x = 3(x-1)

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4x = 3x -3

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3 years ago
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Step-by-step explanation:

8 0
2 years ago
$800 is invested at a rate of 7%. What will be the total amount of the investment after 3 1/2 years?
torisob [31]

Answer:

A = $996.00

Step-by-step explanation:

(I = A - P = $196.00)

Equation:

A = P(1 + rt)

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A = Total Accrued Amount (principal + interest)

P = Principal Amount

I = Interest Amount

r = Rate of Interest per year in decimal; r = R/100

R = Rate of Interest per year as a percent; R = r * 100

t = Time Period involved in months or years

From the base formula, A = P(1 + rt) derived from A = P + I and I = Prt so A = P + I = P + Prt = P(1 + rt)

Calculation:

First, converting R percent to r a decimal

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Solving our equation:

A = 800(1 + (0.07 × 3.5)) = 996

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The total amount accrued, principal plus interest, from simple interest on a principal of $800.00 at a rate of 7% per year for 3.5 years is $996.00.

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3 years ago
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Step-by-step explanation:

7 0
3 years ago
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