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shepuryov [24]
3 years ago
13

Find an equivalent system of equations for the following system: 3x + 3y = 0 −4x + 4y = −8

Mathematics
1 answer:
Rama09 [41]3 years ago
3 0

Answer:

Answer:

3x + 3y = 0

7x - y = 8

Step-by-step explanation:

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The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a me
zimovet [89]

Answer:

Option D) $275

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = $235

Standard Deviation, σ = $20

We are given that the distribution of amount of money spent by students is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

We have to find the value of x such that the probability is 0.975

P( X < x) = P( z < \displaystyle\frac{x - 235}{20})=0.975  

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

P( z < 1.960) = 0.975

\displaystyle\frac{x - 235}{20} = 1.960\\x =274.2 \approx 275

Approximately 97.5% of the students spent below $275 on textbook.

7 0
3 years ago
Let f(x) = 3x + 2 and g(x) = 4–5x. Find f(x) + g(x)
Vadim26 [7]

Answer:

-2x + 6

Step-by-step explanation:

Step 1: Define

f(x) = 3x + 2

g(x) = 4 - 5x

Step 2: Find f(x) + g(x)

3x + 2 + 4 - 5x

-2x + 6

3 0
3 years ago
Read 2 more answers
Write an equation showing that reggie received 30 points.
andreev551 [17]

Answer: 19 questions wrong, 16 questions right

Step-by-step explanation:

8 0
3 years ago
Noah was assigned to make 64 cookies for the back sale. He made 125% of that number. 90% of the cookies he made were sold. How m
Serhud [2]

Answer: 16

Step-by-step explanation:

100% is 64 and 1% of 64 is 6.4 and if you multiply 6.4 times 25 is 160 so 125% is 160 so 90% of 160 is 144 so 160-144 is 16

6 0
3 years ago
What are the zeros of the following polynomial: xo - 9x = 0
sveta [45]

Answer:

Step-by-step explanation:

hello :

x² - 9x = 0

x(x-9)=0

x=0 or x-9=0

x=0 or x= 9

6 0
3 years ago
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