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Aneli [31]
3 years ago
11

What’s twice the difference of a number and 8 is at least -20 using x as a variable into a inequality please help!!!

Mathematics
1 answer:
alexdok [17]3 years ago
7 0
the answer is x-8=20
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A grain of sand has a mass of 2.6 × 10–3 gram. A grain of salt has a mass of 6.5 × 10–2 gram. How many times greater is the mass
myrzilka [38]

Answer:

C

Step-by-step explanation:

2.6 x10^-3= .0026

6.5 x10^-2=.065

.065/.0026=25

5 0
3 years ago
CHECK MY ANSWER??
Tatiana [17]
You are partially correct :) 2^SQR(10) x SQR(10) = 20 
The answer is just 20
4 0
3 years ago
The distance between the points (-3,-1) and (-4,0) is the square root of ___?
Galina-37 [17]
\bf \textit{distance between 2 points}\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
&({{ -3}}\quad ,&{{ -1}})\quad 
%  (c,d)
&({{ -4}}\quad ,&{{0}})
\end{array}\qquad 
%  distance value
d = \sqrt{({{ x_2}}-{{ x_1}})^2 + ({{ y_2}}-{{ y_1}})^2}
6 0
3 years ago
The room is rectangular and is 10 2/3 feet by 6 1/4 feet. How many feet of wallpaper border do you need?
Nadusha1986 [10]

Answer:

Parimeter =  (10 2/3 + 6 1/4 + 10 2/3 + 6 1/4) = 20 4/3 + 12 2/4

Parimeter = 21 1/3 + 12 1/2 = 21 2/6 + 12 3/6 = 33 5/6 ft

Amount of Wallpaper Border = 33 5/6 ft

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
We are told that the price of basket of fries is drawn from a normal distribution with mean 6 and standard deviation of 2. You w
Masja [62]

Answer:

32.64% probability that you would have enough money to pay for all five baskets of fries

Step-by-step explanation:

To solve this question, we have to understand the normal probability distribution and the central limit theorem.

Normal probability distribution:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central limit theorem:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sample means with size n can be approximated to a normal distribution with mean

In this problem, we have that:

\mu = 6, \sigma = 2, n = 5, s = \frac{2}{\sqrt{5}} = 0.8944

You want to get 5 baskets of fries but you only have $28 in your pocket. What is the probability that you would have enough money to pay for all five baskets of fries?

28/5 = 5.6

So this is the pvalue of Z when X = 5.6.

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{5.6 - 6}{0.8944}

Z = -0.45

Z = -0.45 has a pvalue of 0.3264

32.64% probability that you would have enough money to pay for all five baskets of fries

5 0
3 years ago
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