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3 years ago

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Help me with number 2 please!!!

1 answer:

RoseWind [281]3 years ago

5 0

Simple interest formula:

i = Prt

where
i = interest earned
P = principal amount invested
r = interest rate
t = time

In this problem, we are looking for i.
P = $10,000
r = 3.5% = 0.035
t = 7 years

i = Prt

i = $10,000 * 0.035 * 7 = $2,450

The amount of interest earned in the 7 years is $2,450.
The interest is added to the principal amount that was invested, so after 7 years, David has $10,000 + $2,450 = $12,450

Answer: Choice H.

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Daca a + b = 20 si b + c = 30 ,calculati 3 . a + 7 . b + 4 . c ( Dau coroana la cine ma ajuta )

Oduvanchick [21]

It is given that

a+b=20 -------------------- (1)

b+c=30 -----------------------(2)

We have to calculate

3 a + 4 b +7 c

Now multiplying equation(1 )by 3,we get

3 a+ 3 b=60 ----------------------------------(3)

and Multiplying equation( 2) by 4,we get

4 b + 4 c=120 -----------------------------------(4)

Adding expression (3) and (4),we get i.e left hand side of 3 to left hand side of 4 and right hand side of 3 to right hand side of 4.

3 a+ 3 b+ 4 b+ 4 c=60+120

Adding like terms, we get

3 a+ 7 b+ 4 c =180, Which is the required solution.

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3 years ago

Darius is putting tiles on the roof of his house. After working for 3 1/3 hours, he has completed 4/5 of the roof. Can Darius pu

tangare [24]

Answer:

No.

Step-by-step explanation:

It is given that Darius is putting tiles on the roof of his house.

Darius had completed = $\frac{4}{5}$ th of the work

He takes time = $3 \frac{1}{3}$ hours to complete $\frac{4}{5}$ th of the work

The remaining work = $1 -\frac{4}{5}$

$=\frac{5-4}{5}$

$=\frac{1}{5}$

∴ Darius completes $\frac{4}{5}$ th of the work in = $\frac{10}{3}$ hours

So, $\frac{1}{5}$ th of the work in = $\frac{10}{3} \times \frac{5}{4} \times \frac{1}{5}$ hours

$=\frac{10}{12}$ hours

Therefore total time taken to complete the work $=\frac{10}{3}+\frac{10}{12}$ hours

$=\frac{40+10}{12}$ hours

$=\frac{50}{12}$ hours

$=4\frac{2}{12}$ hours

$=4\frac{1}{6}$ hours

Thus, Darius continues to work at the same rate will not be able to complete the work in 4 hours.

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3 years ago

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ivann1987 [24]

Answer:

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Step-by-step explanation:

bring like terms together in each side of the = side

then work the out

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3 years ago

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nasty-shy [4]

Answer:

B. 2.6457513110...

and

C. 17.156

Step-by-step explanation:

A rational number is an integer, fraction, terminating decimal, or repeating decimal.

hope this helps!

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