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3 years ago

Solve y=-3x+5 5x-4y=-3

1 answer:

6 0

Y = -3x + 5

   5x - 4(-3x + 5) = -3
5x + 4(3x) - 4(5) = -3
   5x + 12x - 20 = -3
         17x - 20 = -3
   + 20 + 20
   17x = 17
      17    17
   x = 1
y = -3x + 5
y = -3(1) + 5
y = -3 + 5
y = 2
(x, y) = (1, 2)

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Jenny has $1,200 in her savings account. If the bank pays 3% interest per year on savings, how much interest does she earn in on

Strike441 [17]

Given:

Principal value = $1200

Rate of interest = 3% per year

To find:

The interest earned by Jenny in one year.

Solution:

Formula of interest:

$I=\dfrac{P\times r\times t}{100}$

Where, P is principal, r is rate of interest and t is time.

We have, P = 1200, r = 3, t=1. Putting these values, we get

$I=\dfrac{1200\times 3\times 1}{100}$

$I=\dfrac{3600}{100}$

$I=36$

The interest earned by Jenny in one year is $36.

Therefore, the correct option is A.

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3 years ago

Finding domain f(x)=3x+1/x-5

arlik [135]

The function is undefinded if the denominator, x-5, equals 0.
So $x-5 \neq 0 \\ 
x \neq 5$ .
The domain is $x \neq 5$ .
In interval notation, this is (-infinity, 5) u (5, infinity).

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3 years ago

60 is 40% of what number

REY [17]

60--------40%
15--------10%
150--------100%

5 0

3 years ago

Read 2 more answers

11) Winnie the Pooh goes to the honey store to buy a case of honey for the winter. The case of 24 jars of honey cost $27.60. Wha

ahrayia [7]

Answer:

1,15

Step-by-step explanation:

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27,60:24 = 1,15

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3 years ago

school teacher and needs 22 pieces of wood, 3 over 8 ft long, for a class project. If he has a 9-ft board from which to cut the

tiny-mole [99]

Answer:

Yes, he will have enough 3 over 8 ft pieces for his class.

Step-by-step explanation:

Given:

Number of wood required = 22

Length of each wood, $l=\frac{3}{8}\textrm{ ft}$

Total length of the board, $L=9\textrm{ ft}$

Therefore, the number of woods that can be made using the given board is given as:

$\textrm{Number of woods made}=\frac{\textrm{Total length of board}}{\textrm{Length of each wood}}\\\textrm{Number of woods made}=\frac{L}{l}=\frac{9}{\frac{3}{8}}=9\times \frac{8}{3}=\frac{72}{3}=24$

So, he can make 24 woods of length $\frac{3}{8}\textrm{ ft}$ using the 9 ft board. But he has to make only 22 pieces.

Therefore, he has enough of the wood to make the required number of pieces.

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3 years ago