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Fofino [41]
3 years ago
10

The cost of four sweaters an two pairs of jeans is 140$. The cost of two sweaters an three pairs of jeans is $150.

Mathematics
2 answers:
bearhunter [10]3 years ago
7 0

sweater cost $20 and jeans cost $30

Kisachek [45]3 years ago
3 0

Answer:

A pair of jeans cost 40 dollars

A sweater costs 15 dollars

Step-by-step explanation:

Let s = cost a of sweater

j = cost of a pair of jeans

4s +2j = 140

2s +3j = 150

I will use elimination to solve.  Multiply the second equation by -2

-2(2s +3j )= 150*-2

-4s -6j = -300

Add this equation to the first equation

-4s -6j = -300

4s +2j = 140

--------------------

    -4j = -160

Divide by -4

-4j/-4 = -160/-4

j = 40

A pair of jeans cost 40 dollars

Now we need to find the cost of the sweater

2s +3j = 150

2s +3(40) = 150

2s+120 = 150

Subtract 120 from each side

2s +120-120=150-120

2s = 30

Divide by 2

2s/2=30/2

s = 15

A sweater costs 15 dollars

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Answer:

15.9% of babies are born with birth weight under 6.3 pounds.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 6.8 pounds

Standard Deviation, σ = 0.5

We are given that the distribution of  birth weights is a bell shaped distribution that is a normal distribution.

Formula:

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P( x < 6.3) = P( z < \displaystyle\frac{6.3 - 6.8}{0.5}) = P(z < -1)

Calculation the value from standard normal z table, we have,  

P(x < -1) = 0.159 = 15.9\%

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lubasha [3.4K]

Answer:

see attachment

Step-by-step explanation:

The given equation is

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This quadratic graph has its vertex at (0,2) and turns upside down.

The right hand side of the equation is

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This quadratic graph opens upwards and has its vertex at (0,-8).

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Which of the following points could be added to the graph f(x)=-|x+3| to keep the graph a function?
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None of the points could be added to the graph f(x)=-|x+3| to keep the graph a function

<h3>How to determine the point?</h3>

The equation of the function is given as:

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The points are given as:

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When x = 0, we have:

f(0) = - |0 + 3|

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Answer:

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Step-by-step explanation:

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