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2 years ago

2/3x − 1/5x = x −1 equals what? I'm confused on this

Mathematics

1 answer:

Galina-37 [17]2 years ago

8 0

Answer:

x=15/8

Step-by-step explanation:

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there are seven steel plates in a stack. one steel plate is 3/4 inches thick. calculate hight of the stack of steel plates

Neporo4naja [7]

Answer:

Below in bold.

Step-by-step explanation:

Height of stack

= 7 * 3/4

= 21/4

= 5 1/4 inches high.

5 0

1 year ago

A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 419 gram setting. It

Pachacha [2.7K]

Answer:

We reject the null hypothesis, and accept the alternative hypothesis.

So, it means that the machine is under filling the bags

Step-by-step explanation:

Given

Null Hypothesis

$H_0:\mu = 419$ --- works correctly at 419g

Alternate Hypothesis

$H_0:\mu < 419$ --- under fills the bag

$n =15$ --- the sample

$\bar x = 409$ --- the mean

$\sigma = 22$ --- the standard deviation

$\alpha = 0.05$ --- the significance level

Required

What is the decision rule

Since n is less than 30, we make use of t test

$t = \frac{\bar x - \mu}{\sigma/\sqrt n}$

$t = \frac{409 - 419}{22/\sqrt{15}}$

$t = \frac{-10}{22/ 3.87}$

$t = \frac{-10}{5.58}$

$t = -1.792$

Calculate df

$df = n-1$

$df = 15-1$

$df = 14$

Calculate the p value from the Student's t-distribution at df = 14 and $t = -1.792$

$p =0.047$

Given that: $\alpha = 0.05$

Since $p < \alpha$

So, it means that the machine is under filling the bags

6 0

2 years ago

line J passes through points (-6,1) and (-3,6) . Line m is parallel to line j and passes through point (15,-1).what is the equat

VMariaS [17]

Slope of the line J
(6-1) / (-3-(-6))
5 / 3

so
m = 5/3

If this line passes through (15,-1)
y = mx + c
-1 = (5/3)*15 + c
-1 = 25 + c
c = -26

equation is
y = (5/3)x - 26

7 0

3 years ago

Which of the following numbers can be expressed as decimals that terminate? 5/2 4/5 2/7 4/3

gulaghasi [49]

4/5,5/2 are the only ones that terminate

6 0

3 years ago

Read 2 more answers

Can an acute and obtuse angle be supplementary? Draw a figure showing supplementary angles?

uysha [10]

Yes, I will list acute first (<90) and obtuse second (>90) and they need to add to 180

10 and 170
20 and 160
30 and 150
40 and 140
50 and 130
60 and 120
70 and 110
80 and 100 and so on

8 0

2 years ago