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Romashka [77]
3 years ago
9

12 decreased by eight times a number is 36 find the number

Mathematics
2 answers:
mina [271]3 years ago
4 0

Answer:

9

Step-by-step explanation:

You take 12 and subtract 8. You should get 4. Then you divide 36 by 4 and you get 9. So, 12 - 8 x 4 = 36.

vesna_86 [32]3 years ago
4 0
The answer is 9
12-8•9=36
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Sixty-five percent of the 8th grade class is selling magazines for the class fundraiser. If 195 students are selling magazines,
kari74 [83]

Answer:

300 students

Step-by-step explanation:

If 195 students is 65%, then we can divide 195 by 65 to find what 1% is.

195/65= 3

So 1% of the 8th grade class is 3 students. We want to know how many students are in the whole class, which would be 100% of the class.

If we multiply the 3 (which is 1%) by 100 (to get 100%) we can find the total number of students.

3x100=300

We can check this by finding 65% of 300, and seeing if that is 195.

300x.65=195

It does check out.

8 0
3 years ago
Find the unknown side length. Write your answer in simplest radical form.
Eva8 [605]

Answer: 1. x= 20 units,   2. x= 5\sqrt{3} units    3. x= 4\sqrt{2} units.

Step-by-step explanation:

In a right triangle,

Hypotenuse^2= Perpendicular^2+Base^2  (Pythagoras theorem)

1. Hypotenuse = x , Base = 16, Perpendicular = 12

\Rightarrow\ x^2 =12^2+16^2\\\\ \Rightarrow\ x^2=144+256\\\\ \Rightarrow\ x^2=400\\\\ \Rightarrow\ x=\sqrt{400}=20

2. Hypotenuse = 14 , Base = 11, Perpendicular = x

\Rightarrow\ 14^2=x^2+11^2\\\\\Rightarrow\ 196=x^2+121\\\\\Rightarrow\ x^2=196-121\\\\\Rightarrow\ x^2 = 75\\\\\Rightarrow\ x=\sqrt{75}=\sqrt{25\times3}=5\sqrt{3}

3.  Hypotenuse = 9 , Base = x, Perpendicular =7

\Rightarrow\ 9^2=x^2+7^2\\\\\Rightarrow\ 81= x^2+49\\\\\Rightarrow\ x^2=81-49\\\\\Rightarrow\ x^2=32\\\\\Rightarrow\ x=\sqrt{32}=\sqrt{16\times2}\\\\\Rightarrow\ x=4\sqrt{2}

5 0
3 years ago
By substituting the given values for x calculate the y value for the following equation y=x+2
yawa3891 [41]

Answer:

what are the given values for x?

Step-by-step explanation:

i don't know what the given values for x are

but if you know them, here's an example

let's say x=4

y=(4)+2

y=6

6 0
3 years ago
Find the unit rate for 1/2 mile in 3/10 hour
babunello [35]

Answer:

1 mile for every 0.6 hours

Step-by-step explanation:

0.5 x 2 = 1

3/10 x 2 = 6/10

2 miles = 1.2 hours

4 0
2 years ago
X³+x²-x-1=?<br> What is the solution for th8s?
Assoli18 [71]

Answer: (x − 1 ) ^{2}

3 0
3 years ago
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