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3 years ago

Which length measurement is the most precise.

Mathematics

1 answer:

vampirchik [111]3 years ago

5 0

B: 6.03 The more numbers to the right of the decimal the more precise and accurate the number will be

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Which statement describes the relationship between the line graphs of the equations below? y = −2 x + 4 y = 1/2x + 4 a. The line

svetoff [14.1K]

Answer:

You can tell from the picture

Step-by-step explanation:

they intercept

4 0

3 years ago

What is the x-value at which the graphs of y = x2 – 2x + 1 and y = x2 + 2x – 7 inter-<br> sect?

Kitty [74]

Answer:

x = 2

Step-by-step explanation:

Both equations are equal to y, so they're also equal to each other. We then set them equal to each other:

x^2 - 2x + 1 = x^2 + 2x - 7

We now do algebra to isolate x. Subtract 1 from both sides.

x^2 - 2x = x^2 + 2x - 8

Subtract 2x from both sides.

x^2 - 4x = x^2 - 8

Subtract x^2 from both sides.

-4x = -8

Divide both sides by -4.

x = 2

5 0

3 years ago

An SRS of 450 450 high school seniors gained an average of ¯ x = 20 x¯=20 points in their second attempt at the SAT Mathematics

maria [59]

Answer: (15.47, 24.53)

Step-by-step explanation:

We know that the confidence interval for population mean is given by :_

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

, where n= sample size.

$\sigma$ = standard deviation.

$\overline{x}$ = sample mean.

z*= Critical value.

Given : n= 450

$\overline{x}=20$

$\sigma=49$

Critical value for 95% confidence = z*=1.96 [From z-value table]

Then, the 95% confidence interval will be :-

$20\pm (1.96)\dfrac{49}{\sqrt{450}}$

$\approx 20\pm (1.96)(2.31)$

$\approx 20\pm 4.53$

$=(20-4.53,\ 20+4.53)=(15.47,\ 24.53)$

Hence, the 95% confidence interval for the mean change in score μ μ in the population of all high school seniors. : (15.47, 24.53)

3 0

3 years ago

You had $23 to spend on three raffle tickets. After buying them you had $17.

Viktor [21]

Answer:

Step-by-step explanation:

$23-3x=17$

$-3x=-6$

$x=2$

Therefore, each raffle ticket cost $2.

3 0

2 years ago

Read 2 more answers

What is 75.65 rounded to the nearest whole number?

Nitella [24]

Answer:

Step-by-step explanation:

if the number after period is bigger than 5.. then it's about the number higher than the number befor the period

sorry if u have trouble understanding what I said I'm really not good at explaining:)

5 0

2 years ago

Read 2 more answers