What is value of X+8 Enter your answer in the box 2x-5 B 10 14 Plz help

vivado [14]

Let maria drive for x hours, then

51x + 53(5-x) = 258 
265 - 2x = 258 
2x = 7 
x = 3.5 hours 
-------------------

5 0

3 years ago

Kirra went to the gym she was there from 11:35 to 1:30 how long was she there? plz answer

Ne4ueva [31]

11:35 - 12:00 = 25 minutes
12:00 - 1:30 = 1 hour and 30 minutes

so 25 minutes + 1 hour and 30 minutes = 1 hour and 55 minutes

answer: 1 hour and 55 minutes

4 0

4 years ago

Read 2 more answers

The answer to this problem is 74 I just want to know how to get that number

Rudiy27

I don't know if it's 74, but I got -80. here's how:

(3x + 5 x -4x + 7) (-4)

(8 x -4x + 7) (-4)

(8 x 3) (-4)

24 x -4 = -80

8 0

4 years ago

Chloe collected 4 times as many bags of cans as her friend. If her friend collected 1/6 of a bag , how much did Chloe collect?

lana66690 [7]

Since Chloe collected 4 times as much as her friend, who collected 1/6 a bag, you will have to multiply 4 by 1/6 to find how much Chloe collected.

To multiply fractions, you multiply the numerators and multiply the denominators. Then you put the product you got from multiplying the numerators over the product you got from multiplying the denominators. Remember that 4 is the same as 4/1. Simplify the product if needed.:
$\frac{4}{1} \times \frac{1}{6} = \frac{4}{6} = \frac{2}{3}$

Chloe collected 2/3 of a bag.

8 0

3 years ago

est scores for a statistics class had a mean of 79 with a standard deviation of 4.5. Test scores for a calculus class had a mean

Arte-miy333 [17]

Answer:

The z-score for the statistics test grade is of 1.11.

The z-score for the calculus test grade is 7.3.

Due to the higher z-score, the student performed better on the calculus test relative to the other students in each class

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

In this question:

The grade with the higher z-score is better relative to the other students in each class.

Statistics:

Mean of 79 and standard deviation of 4.5, so $\mu = 79, \sigma = 4.5$