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3 years ago

Marissa drove 3000 miles in 75 hours. At this rate, how long will it take her to drive 4000 miles?

Mathematics

2 answers:

Kay [80]3 years ago

4 0

Answer:

88.33 hrs

Step-by-step explanation:

Kruka [31]3 years ago

4 0

Answer:

100 hours

Step-by-step explanation:

You can divide 3000 miles by 75 hours to find the mile per hour. You get 40mph and you divide 4000 by 40 to get 100 hours for 4000 miles.

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How do i work out 6x+6=0

Mademuasel [1]

Answer:

6x= -6

x= -1

Step-by-step explanation:

Common equation,6 instead of 0 equals to negative 6, then divide it by 6 equals to negative 1

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4 years ago

The quotient of m and 11 minus 3 as a algebraic expression

IgorLugansk [536]

Hello! How are you!
I know the answer to your question! It's very easy!
Here's your answer!

m(11-3) or m*(11-3)
This is the answer because, if you use P.E.M.D.A.S., You would have to subtract!

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3 years ago

What is the equation of a line that passes through the point (10, 5) and is perpendicular to the

Gnom [1K]

Answer:

y = -x + 15

Step-by-step explanation:

y = x-2

slope = 1

perpendicular line slope = -1

pass point (10, 5)

y intercept = y - mx = 5 - (-1)x10 = 15

equation: y = mx + b

y = -x + 15

8 0

3 years ago

Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Identify t

laiz [17]

Answer:

There is sufficient evidence to conclude that child booster seats meet the specific requirement.

Step-by-step explanation:

Sample: 697, 759, 1266, 621, 569, 432

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{4344}{6} = 724$

Sum of squares of differences = 415616

$S.D = \sqrt{\frac{415616}{5}} = 288.31$

We are given the following in the question:

Population mean, μ = 1000 hic

Sample mean, $\bar{x}$ = 724

Sample size, n = 16

Alpha, α = 0.05

Sample standard deviation, s = 288.31

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 1000\text{ hic}\\H_A: \mu < 1000\text{ hic}$

We use one-tailed(left) t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{724 - 1000}{\frac{288.31}{\sqrt{6}} } = -2.344$

Now, $t_{critical} \text{ at 0.05 level of significance, 5 degree of freedom } = -2.015$

Calculation the p-value from table,

P-value = 0.033

Since,

Since, the p value is lower than the significance level, we fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.

We conclude that the measurement is less than 1000 hic.

Thus, there is sufficient evidence to conclude that child booster seats meet the specific requirement.

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4 years ago

Ayuda con esto vale 7.5% de la nota doy 15 puntos

Murrr4er [49]

Answer:

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Step-by-step explanation:

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3 years ago