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3 years ago

What are 3 solutions to -4x+3y=-6

1 answer:

3 0

Let's solve for x.−4x+3y=−6Step 1: Add -3y to both sides.−4x+3y+−3y=−6+−3y−4x=−3y−6Step 2: Divide both sides by -4.−4x−4=−3y−6−4x=34y+32Answer:x=3/4y+3/2

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"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students

dezoksy [38]

Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

Step-by-step explanation:

Since we have given that

Sample size = 400

Mean = $357.75

Standard deviation = $37.89

At 95% confidence level, z = 1.96

We first find the margin of error.

Margin of error is given by

$z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{37.89}{\sqrt{400}}\\\\=3.71$

95% confidence interval would be

$\bar{x}\pm \text{margin of error}\\\\=357.75\pm 3.71\\\\=(357.75-3.71,357.75+3.71)\\\\=(354.04,361.46)$

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

7 0

3 years ago

Solving simular triangles advanced

Reptile [31]

Answer:

x = 3/2

Step-by-step explanation:

We can use ratios to solve

6 6+x

-------- = -----------

4 5

Using cross products

6*5 = 4 * (6+x)

30 = 24 + 4x

Subtract 24 from each side

30 -24 = 24+4x-24

6 = 4x

Divide each side by 4

6/4 = 4x/4

3/2 = x

3 0

3 years ago

Read 2 more answers

Write the equation 2x + 6x + y2 - 8y= 19 in standard form

wariber [46]

Y^2+8x-8y=19... I think?

3 0

3 years ago

Read 2 more answers

6/11 of students are at a school are girls . If there are 1309 students at the school , how many are boys

Alexandra [31]

There are 714 boys in that school, you can cross multiply and divide to find the answer, if you wanna check. The way I wrote it was x (boys) / 1309 = 6/11.

3 0

3 years ago

What is the area of the composite figure? (6π + 10) m2 (10π + 10) m2 (12π + 10) m2 (16π + 10) m2

krek1111 [17]

The answer is the first choice

5 0

3 years ago

Read 2 more answers