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1 year ago

Hello can you help me with this problem ?

Mathematics

1 answer:

Lelechka [254]1 year ago

3 0

Step-by-step explanation:

please mark me as brainlist please

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System by substitution. Tar 7x - 3y=8 y=3x

valentina_108 [34]

Answer:

Step-by-step explanation:

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8 0

2 years ago

Please help, I have been struggling w this one for a while:(

viva [34]

Answer:

option 2

Step-by-step explanation:

I hope that's the answer cause I'm pretty sure it is

3 0

2 years ago

Simplify: (2x – 3)2 4x2 + 9 4x2 – 12x + 9 4x2 – 12x + 6 4x2 – 6

Alexxandr [17]

Answer:

$4x^2-12x+9$

Step-by-step explanation:

we have

$(2x-3)^2$

we know that

$(a-b)^2=a^2-2ab+b^2$

In this problem

$a=2x\\b=3$

substitute in the formula

$(2x-3)^2=(2x)^2-2(2x)(3)+(3)^2$

$(2x-3)^2=4x^2-12x+9$

7 0

2 years ago

Read 2 more answers

Cada par de numeros esta a razon de 2:3

german

(0,8)+(7,-52) eso es la problema

4 0

2 years ago

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

2 years ago