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MrMuchimi
3 years ago
8

There are 120 planes on an airfield. If 75% of the planes take off, how many planes took off?

Mathematics
1 answer:
Soloha48 [4]3 years ago
7 0

Answer:

You have to do 120 divided by 0.75 use a calculator

Step-by-step explanation:

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Pls help me with this​
Vedmedyk [2.9K]
10 cuz it’s a 2 € 10 and it’s 10
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3 years ago
Find the values of a, b, and c in the equation
MatroZZZ [7]
I believe you have to use power rules for these so for the numerator (x^5yz^4)^3 the power outside of the bracket will multiply with the powers inside the bracket in order to simplify this part so the numerator of the fraction would be x^15y^3z^12 (because 5x3=15, 1x3=3, 4x3=12)
Next simplify the fraction this is done by subtracting the powers so x^15y^3z^12/x^3yz =x^12y^2z^11 (because any singular letter term ie y can also be seen as y^1, using this 15-3=12, 3-1=2, 12-1=11) this is your final answer so a=12 b=2 and c=11
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3 years ago
Solve the simultaneous equation <br> 4x+7y=1<br> 3x+10y=15
suter [353]
4x +   7y = 1   ⇒ 12x + 21y = 3
3x + 10y = 15 ⇒ <u>12x + 40y = 60</u>
                                    <u>-19y</u> = <u>-57</u>
                                     -19     -19
                                         y = 3
                             4x + 7(3) = 1
                               4x + 21 = 1
                               <u>      - 21  - 21</u>
                                       <u>4x</u> = <u>-20</u>
                                        4       4 
                                         x = -5
                                   (x, y) = (-5, 3)
5 0
3 years ago
Read 2 more answers
Which shows the correct substitution of the values a, b, and c from the equation –2 = –x + x2 – 4 into the quadratic formula? Qu
sergejj [24]

Answer:

The answer in the procedure

Step-by-step explanation:

we have

2=-x+x^{2} -4

x^{2}-x-4-2=0

x^{2}-x-6=0

we know that

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

x^{2}-x-6=0

so

a=1\\b=-1\\c=-6

substitute in the formula

x=\frac{-(-1)(+/-)\sqrt{(-1)^{2}-4(1)(-6)}} {2(1)}

x=\frac{1(+/-)\sqrt{25}} {2}

x=\frac{1(+/-)5} {2}

x=\frac{1(+)5} {2}=3

x=\frac{1(-)5} {2}=-2

8 0
3 years ago
Can you guys figure it out ??
Studentka2010 [4]
I'm not sure but I think it's 15
7 0
4 years ago
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