Answer:
-30
Step-by-step explanation:
( Add 2 on both sides)
( Multiply by -3 on both sides)
<u>Verify:</u>
<u /> (Correct<u>)</u>
Mrs. onusko made 60 cookies for a bake sale she sold 2/3 and gave 3/4 of the remaining cookies to the students working at the sa
2 answers:
There are 5 cookies left.
<h3>Further Explanation</h3>
<u>Given:</u>
- Mrs. Onusko made 60 cookies
- She sold
of the cookies
- She gave
of the remaining to the students
<u>Question:</u>
How many cookies did she have left?
Based on the information above, first we are going to calculate the number of cookies that were sold:
so the remaining cookies would be:
= total cookies made - total cookies sold = 60-40 = 20 cookies
Mrs. Onusko gave of the remaining cookies to the students:
so, now the number of cookies left:
Additional fraction brainly.com/question/1123562
Fraction additional brainly.com/question/11894522
Mixed fraction (part to whole relationship) brainly.com/question/2954545
<h3 />Keywords: fraction, subtraction, part to whole relationship, additional fraction
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Answer:
The first step is calculate the degrees of freedom, on this case:
Since is a one side left tailed test the p value would be:
And we can use the following excel code to find it: "=T.DIST(-0.024,20,TRUE)"
Step-by-step explanation:
Data given and notation
represent the mean
represent the sample standard deviation
sample size
represent the value that we want to test
represent the significance level for the hypothesis test.
t=-0.024 would represent the statistic (variable of interest)
represent the p value for the test (variable of interest)
State the null and alternative hypotheses.
We need to conduct a hypothesis in order to check if the mean for the widths of tornadoes is lower than 140 yd, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:
(1)
t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".
Calculate the statistic
The statistic is given by:
P-value
The first step is calculate the degrees of freedom, on this case:
Since is a one side left tailed test the p value would be:
And we can use the following excel code to find it: "=T.DIST(-0.024,20,TRUE)"
Based on the p value obtained we can conclude that we FAIL to reject the null hypothesis at any significance level selected
Step-by-step explanation (Question 1):
<u>Step 1: (Question 1): Subtract x from both sides.</u>
5x+3=x+13
5x+3−x=x+13−x
4x+3=13
<u>Step 2: (Question 1): Subtract 3 from both sides.</u>
4x+3−3=13−3
4x=10
<u>Step 3: (Question 1): Divide both sides by 4.</u>
4x/4 = 10/4
FIRST ANSWER: x = 5/2
Step-by-step explanation (Question 2):
<u>Step 1: (Question 2): Multiply by LCM</u>
15x^2 - 6 = x
<u>Step 2: (Question 2): Solve 15x^2</u>
15x^2 - 6 = x:
x = 2/3
x = -3/5
<u>Step 3: (Question 2): Solve</u>
ANSWER: x=0.666667 or x=−0.6
See Attachment 1 for question 1 steps (FULL)
See Attachment 2 for question 2 steps (FULL)
Answer:
1) x = 5/2
2) x=0.666667 or x=−0.6
Hope this helps.
