All categories

3 years ago

HELPPPPPPPPPPP PLSS :P

Mathematics

1 answer:

Yakvenalex [24]3 years ago

8 0

Answer:

9. 18x

10. x - 9

11. 12x

12. $c^2 + 14$

13. 2(x - 11)

14. $5( \frac{x}{4} )$

Step-by-step explanation:

9. Remember that product means multiply, so 18 * x is the equation. Or 18x.

10. If the price is represented by x, and it decreases by 9, then we can represent that by x - 9.

11. Times means multiply. We can use x for the number of hours, so 12 * x or 12x works in this situation.

12. Sum means to add so we would add c squared and 14 to get c^2 + 14.

13. A number decreased by 11 is represented by x - 11, and all of that is multiplied by 2.

14. A number divided by 4 is represented by the x/4. All that is multiplied by 5.

I hope this helps!!

- Kay :)

You might be interested in

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with mean of 1262 and a s

Andrew [12]

Answer:

a) 1186

b) Between 1031 and 1493.

c) 160

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

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.

Normally distributed with mean of 1262 and a standard deviation of 118.

This means that $\mu = 1262, \sigma = 118$

a) Determine the 26th percentile for the number of chocolate chips in a bag. 

This is X when Z has a p-value of 0.26, so X when Z = -0.643.

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

$-0.643 = \frac{X - 1262}{118}$

$X - 1262 = -0.643*118$

$X = 1186$

(b) Determine the number of chocolate chips in a bag that make up the middle 95% of bags.

Between the 50 - (95/2) = 2.5th percentile and the 50 + (95/2) = 97.5th percentile.

2.5th percentile:

X when Z has a p-value of 0.025, so X when Z = -1.96.

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

$-1.96 = \frac{X - 1262}{118}$

$X - 1262 = -1.96*118$

$X = 1031$

97.5th percentile:

X when Z has a p-value of 0.975, so X when Z = 1.96.

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

$1.96 = \frac{X - 1262}{118}$

$X - 1262 = 1.96*118$

$X = 1493$

Between 1031 and 1493.

(c) What is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?

Difference between the 75th percentile and the 25th percentile.

25th percentile:

X when Z has a p-value of 0.25, so X when Z = -0.675.

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

$-0.675 = \frac{X - 1262}{118}$

$X - 1262 = -0.675*118$

$X = 1182$

75th percentile:

X when Z has a p-value of 0.75, so X when Z = 0.675.

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

$0.675 = \frac{X - 1262}{118}$

$X - 1262 = 0.675*118$

$X = 1342$

IQR:

1342 - 1182 = 160

7 0

3 years ago

Select the quadratic equation that has no real solutions.

julsineya [31]

Answer: In the quadratic formula, if the discriminant is greater than or equal to 0, then the solutions to the quadratic equation will be real numbers. ... Looking at the graph of a quadratic equation, if the parabola does not cross or intersect the x-axis, then the equation has no real solution.

3 0

2 years ago

Multiply or divide. Show your work. 5x+10/x+2*2x/4x-10

jolli1 [7]

$\frac{5x + 10}{x + 2} * \frac{2x}{4x - 10} = \frac{5(x) + 5(2)}{x + 2} * \frac{2x}{2(x) - 2(5)} = \frac{5(x + 2)}{x + 2} * \frac{2x}{2(x - 5)} = \frac{5}{1} * \frac{x}{x - 5} = \frac{5x}{x - 5}$

5 0

3 years ago

Today only, a table is being sold for $333 . This is 74% of its regular price. What was the price yesterday?

Vinil7 [7]

The table was being sold at $450 yesterday

5 0

2 years ago

Please help will mark Brainly

SVETLANKA909090 [29]

Answer: C

Step-by-step explanation:

We are given the information that:

The airplane is at 50,000 feet
It descends 2,500 feet in 1 minute
x = minutes

For ease of solving this question, let's set the number of minutes (x) to 1.

In one minute, we know the plane will drop to 47,500 feet. (50,000 - 2,500(x))

There are multiple ways to write this equation bu shifting around negative and positive values. Another way to write this equation would be (-2,500(x) + 50,000). That would be choice C.

Try it out~

$(-2,500(x) + 50,000)\\ (-2,500(1) + 50,000)\\ (-2,500 + 50,000)\\47,500$

It works, so our answer is C.

5 0

3 years ago