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Nastasia [14]
2 years ago
9

The sum of an unknown and eight is twenty. What is the unknown?​

Mathematics
2 answers:
gregori [183]2 years ago
7 0

Answer:

12

Step-by-step explanation:

We can transform this into an equation in which the unknown will be represented by x. The word "sum" shows us that we are using addition, and we already know that we are adding 8 to the unknown (or x) and the answer to the equation is 20. Lets put this into a number equation now.

x+8=20

Now we just undo the equation. We have to subtract 8 from both sides.

x+8(-8)=20(-8)

x=12

The answer is 12. :) have a good day!

Zarrin [17]2 years ago
4 0

indicates subtraction

20 - 8 = 12

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50 points! See attachment
Eduardwww [97]

Question 19.). There is 1 + 1 + 3 + 4 + 3

Quiz Papers = 12

Four Papers with Scores of Six out Twelve

1 Selected:

Probability: 4/12

Answer: Letter Choice, (A), = 1/3

Question 20.). Two papers > 7

1 ===> 8, 1 ===> 9

Probability:

2/12

Answer: Letter Choice (F), 2/12 = 1/6

Hope that helps!!!! : )

8 0
3 years ago
Read 2 more answers
A pole casts a 6-foot shadow. If the distance from the top of the pole to the tip of the shadow is
KATRIN_1 [288]

Answer:

8feet high

Step-by-step explanation:

To get the height of the pole, we will use the pythagoras theorem. Let H be the height

H²  = 10² -6²

H² = 100 - 36

H² = 64

H = √64

H = 8feet

Hence the pole is 8feet high

3 0
3 years ago
The perimeter of a triangle is 17 inches. One side is 5 inches, and another is 4 inches. What is the length of the third side?
notsponge [240]

Answer:

8inches

Step-by-step explanation:

Length of the third side = perimeter - ( side1 + side2 )

                                       = 17 - (5+4)

                                       = 17 - 9

                                       = 8 inches

7 0
3 years ago
If y = 0.15 when x = 1.5, what is y when x = 6.3?
Juliette [100K]
(6,3x0,15)/1,5 = 0,945/1,5 = 0,63

<span>I hope to have helped you ! :)</span>

7 0
3 years ago
Read 2 more answers
I need help i don’t know the answer
Julli [10]
Answer:

3x - 4 and 2x + 15

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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