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4 years ago

15

Starting at 1:00 p.M. The temperature changes negative 4 degrees per hour. How will it take to reach negative 1 degree? At one t

he temperature is 35 degrees.

1 answer:

lbvjy [14]4 years ago

5 0

I think 130 degrees

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Bruce evaluates the expression on a math quiz, 8.8 ÷ 2.7 and gets an answer of 4.14.

IgorLugansk [536]

The most reasonable answer is D.

8.8 will round to 9 and 2.7 will round to 3, and the division will round to 3. Bruce's answer rounds to 4, so his answer is not reasonable.

6 0

4 years ago

-58 - 7x = -10x + 29

Sati [7]

Answer:

x = 29

Step-by-step explanation:

-58 - 7x = -10x + 29

-58 + 3x = 29

3x = 87

x = 29

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4 years ago

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A packet of crisps contains 50g. If a “new size” packets contain 15% more, how many grams of crisps are in the “new size” packet

Agata [3.3K]

To solve this, you’d multiply 50 by 1.15 to get 57.5 grams of crisps.

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3 years ago

Expanding Expressions: Expand the following expressions.

Kryger [21]

Answer:

$1) \: \: \: \: \: 5(r + 2) \\ \: \: \: \: \: \: \: \: 5r + 10 \\ \\ 2) \: \: \: \: \: 6b(b - 2a) \\ \: \: \: \: \: \: {6b}^{2} - 12ab \\ \\ 3) \: \: \: \: \: 8cd(c - 2 + 40) \\ \: \: {8c}^{2}d - 16cd + 320cd \\ {8c}^{2}d - 304cd$

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3 years ago

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Suppose that a random variable X is continuously uniform between the values of 3 and 8. Find the variance of the distribution of

Korolek [52]

The formula of the variance of the distribution of sample mean of a random variable X, which it will denoted by $V(\bar{X}),$ is

$\frac{\sigma^2_X}{n}\ ,\\$

where n is the size of the sample.

Since X is continuously uniform between 3 and 8, you have

$\sigma^2_X = \frac{(8-3)^2}{12} = \frac{25}{12} \ .$

Therefore, the variance wanted is $V(\bar{X} ) = \frac{25}{26\cdot12}\approx0.0801$

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3 years ago