3 years ago

Need help with this question please

Mathematics

1 answer:

Firlakuza [10]3 years ago

7 0

Answer:

7;4 7 to 4

Step-by-step explanation:

You might be interested in

Find the slope-intercept equation of the line

Ad libitum [116K]

Answer:

y = -1/2x - 1/2

Step-by-step explanation:

lmk if you want an explanation

7 0

2 years ago

Evaluate the following expression: 5+7(3x+y) when x=12, y=8

timofeeve [1]

First step is 5+7(36x+8y) because you have to distribute

5 0

3 years ago

Read 2 more answers

What's the absolute value of -|6| + 6? Options : O. 0 O. 12 O. -12

vekshin1

Answer:

Zero

Step-by-step explanation:

any absolute value bars come off so -6+6=0

3 0

3 years ago

Read 2 more answers

The life in hours of a 75-watt light bulb is known to be normally distributed with standard deviation σ = 25 hours. A random sam

irina [24]

Answer: a) (1008.34,1019.658) b) (1009.24,1018.76)

Step-by-step explanation:

Since we have given that

n = 75

mean = 1014 hours

Standard deviation = 25 hours

At 95% two sided , z = 1.96

So, confidence interval would be

$\bar{x}\pm z\dfrac{\sigma}{\sqrt{n}}\\\\=1014\pm 1.96\dfrac{25}{\sqrt{75}}\\\\=1014\pm 5.658\\\\=(1014-5.658,1014+5.658)\\\\=(1008.34,1019.658)$

(b) Construct a 95% lower confidence bound on the mean life.

z = 1.65

So, confidence interval would be

$\bar{x}\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1014\pm 1.65\times \dfrac{25}{\sqrt{75}}\\\\=1014\pm 4.76\\\\=(1014-4.76,1014+4.76)\\\\=(1009.24,1018.76)$

Hence, a) (1008.34,1019.658) b) (1009.24,1018.76)

4 0

3 years ago

A ticket to Silver Dollar City costs $125. You have a coupon that will save you 33%. How much will you SAVE? In the same scenari

vampirchik [111]

You will save 41.25 dollars, and you will pay 83.75 dollars if you use the coupon.
To get the percent of money you save you multiply 125 dollars by 33% to get your answer. To get the number of dollars you will take the amount you got by multiplying 125 dollars by 33% and subtract it from 125, so that’s 125 - 41.25 = 83.75

7 0

3 years ago