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3 years ago

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If Christopher consumed 600 calories by drinking x number of sodas, which expression represents the number of calories in each s

oda? A) 600x B) 600 + x C) 600 x D) x 600 E) 1 6 (600x)

2 answers:

Finger [1]3 years ago

7 0

Hello,

Your brainliest answer would be:

C. 600 x

Plz mark me brainliest!

Hope this helps!

lukranit [14]3 years ago

7 0

The answer is
C) 600 x

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36 is what percent of 120

Dafna1 [17]

x%*120=36

x/100 *120=36

120x/100=36

120x=3600 <em>/:120</em>

<em>x=30</em>

<em>⇒36 is 30% of 120 </em>

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6 0

3 years ago

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Given that a truck can drive 25 miles with four gallons of gas, how many gallons does it need to drive 125 miles?

slega [8]

The truck gets 6.25 miles per gallon of gas
6.25 x 20 = 125 miles
the answer is C. 20 gallons

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3 years ago

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A physicist examines 25 water samples for nitrate concentration. The mean nitrate concentration for the sample data is 0.165 cc/

xz_007 [3.2K]

Answer:

The 80% confidence interval for the the population mean nitrate concentration is (0.144, 0.186).

Critical value t=1.318

Step-by-step explanation:

We have to calculate a 80% confidence interval for the mean.

The population standard deviation is not known, so we have to estimate it from the sample standard deviation and use a t-students distribution to calculate the critical value.

The sample mean is M=0.165.

The sample size is N=25.

When σ is not known, s divided by the square root of N is used as an estimate of σM:

$s_M=\dfrac{s}{\sqrt{N}}=\dfrac{0.078}{\sqrt{25}}=\dfrac{0.078}{5}=0.016$

The degrees of freedom for this sample size are:

$df=n-1=25-1=24$

The t-value for a 80% confidence interval and 24 degrees of freedom is t=1.318.

The margin of error (MOE) can be calculated as:

$MOE=t\cdot s_M=1.318 \cdot 0.016=0.021$

Then, the lower and upper bounds of the confidence interval are:

$LL=M-t \cdot s_M = 0.165-0.021=0.144\\\\UL=M+t \cdot s_M = 0.165+0.021=0.186$

The 80% confidence interval for the population mean nitrate concentration is (0.144, 0.186).

6 0

3 years ago

What is the best estimate

Nutka1998 [239]

The answer is b or 20

8 0

3 years ago

Precal. Find the sum. Show every step you took to get to your answer. I will give brainliest if you are correct and show all wor

Ymorist [56]

Answer:

I think your forgot to add some parts of this question, because you can't do anything with this except simplify it down a little maybe. But, I will provide the simplified version of this.

$\frac{x-4}{x^2-2x}+\frac{4}{x^2-4}$

= $\frac{x-4}{x\left(x-2\right)}+\frac{4}{x^2-4}$

= $\frac{x-4}{x\left(x-2\right)}+\frac{4}{\left(x+2\right)\left(x-2\right)}$

= $\frac{\left(x-4\right)\left(x+2\right)}{x\left(x-2\right)\left(x+2\right)}+\frac{4x}{\left(x+2\right)\left(x-2\right)x}$

= $\frac{\left(x-4\right)\left(x+2\right)+4x}{x\left(x-2\right)\left(x+2\right)}$

= $\frac{x+4}{x\left(x+2\right)}$

Step-by-step explanation:

Hope this helped!

8 0

3 years ago