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3 years ago

A hot air balloon has a altitude of 100 1/2

1 answer:

3 0

Question:
A hot air balloon has an altitude of 100 ½.
answer:
what’s the catch, is there anymore to this problem?
explanation:
therefore, I can’t help you, sorry.

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What is 2.3e-5 because I don't know what it is.

astraxan [27]

0.000023 i hope that helps

3 0

3 years ago

You were sick and take a test a day late. Your 95 raised the class average from 69 to 70. How many students, including you, took

tia_tia [17]

Answer:

26

Explanation:

The average is the mean. It is calculated adding all the values and dividing the sum by the number of values (data):

For the students who took the test the day before you, you can write:

$mean_1=\sum scores/n$

Where n is the number of students who took the test first.

Thus, when the average was 69 the equation is:

$69=\sum scores/n$

When you take the test, the n + 1, the new average is 70, and the sum of the scores raised in 95 points:

$mean_2=(\sum scores + 95)/(n+1)\\ \\ 70=(\sum scores+95)/(n+1)$

Now you have a system of two equation and two unknowns, so you can solve it.

Clear the sum of the scores from the first equation:

$69=\sum scores/n=>\sum scores=69n$

Subsitute in the second equation:

$70=(69n+95)/(n+1)$

Solve for n:

$70(n+1)=69n+95\\ \\ 70n+70=69n+95\\ \\ 70n-69n=95-70\\ \\ n=25$

Thus, when you include your self the number of students who took the test was 25 + 1 = 26.

5 0

3 years ago

The difference of two numbers is 34 and their sum is 338

Assoli18 [71]

X-y=34
x+y=338

We can use elimination in this problem.

2x=372
x=186

186+y=338
y=338-186
y=152

4 0

3 years ago

Which expression has a constant of 3? A.) 3x+3y B.) 3m+2 C.) 3a+ 3

olchik [2.2K]

Answer:

Step-by-step explanation:

great question.

any term that is not being multiplied by a variable is a constant.

c is your answer the last term is the number 3 and is not being multiplied by x or y or m (which are all variables)

7 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=x%20%2B%201.2x%20%2B%201%20%3D%20100%20%5C%5C%20%20%5C%5C%20find%20%5C%3A%20x" id="TexFormula1

uysha [10]

Answer: $x=45$

Simplify both sides of the equation

$x+1.2x+1=100$

$(x+1.2x)+(1)=100$ (Combine Like Terms)

$2.2x+1=100$

Subtract 1 from both sides

$2.2x+1-1=100-1\\2.2x=99$

Divide both sides by 2.2

$2.2x/2.2=99/2.2$

$x=45$

4 0

4 years ago

Read 2 more answers