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Galina-37 [17]
3 years ago
10

Last question pls answer

Mathematics
1 answer:
Marina CMI [18]3 years ago
8 0

Answer:

30 min

Step-by-step explanation:

60 divided by 20= 30min

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To find the value of x in the equation 9/4x+2=20, you first get the term with x by itself on one side of the equation. How can y
Scorpion4ik [409]

Answer:

Step-by-step explanation:

9/4x + 2 = 20

To get x by it's self you do the same on both sides of the = to cancel out each side.

9/4x + 2 = 20

(Multiply 9 on both sides)

4x + 2 = 20*9

(Now subtract 2 from both sides)

4x = 20*9 - 2

And finally divide both sides by 4

x = (20*9 - 2)/4

Then solve for x as normal.

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3 years ago
3. Sum of digits of a two digit number is 14. When 18 is added to the original number, then the new number is obtained by exchan
Nitella [24]

Answer:

let the numbers be xy

general form of the number =10x+y

sum of digits of a number =14

x+y=14………[1]

if 18 is added to the number, then digits are interchanged

10x+y+18=10y +x

9x-9y=-18

X-y=-2………[2]

the linear equations are 1) x+y=14

2) X-y=-2

adding [1],[2]

2x=12

x=6

x+y=14

y=14-x

y=14-6

y=8

there fore the number =10*6+8

=68

check:-

1)6+8=14

2)68+18=86

I hope this helped!

Step-by-step explanation:

6 0
4 years ago
I need help with these two angle questions!<br> !
Gnesinka [82]

Answer:

Q7) Obtuse

Q8) Obtuse

Step-by-step explanation:

3 0
4 years ago
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Anyone know the answer?
omeli [17]

The answer is 20.24

After rounding, it becomes 20.2

7 0
3 years ago
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Mice21 [21]

Answer:

1) graph b

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Step-by-step explanation:

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