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faust18 [17]
4 years ago
8

Twice a number plus 5 equals 81

Mathematics
2 answers:
ohaa [14]4 years ago
7 0

solution

2x+5=81

2x=81-5

2x=76

x=38

Marta_Voda [28]4 years ago
7 0

Answer:

38 = x

Step-by-step explanation:

81 = 5 + 2x

- 5 - 5

___________

76 = 2x

__ __

2 2

38 = x

I am joyous to assist you anytime.

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A store has 30 boxes each box has 2 bags and each bag has 3 melons. how many melons are in the store in all?
RUDIKE [14]
You first have to find out how many bags you have in total. So you multiply the number of boxes with the number of bags. After that you get the number of bags and multiply it with the number if melons in each bag.
30×2=60bags
60×3=180melons
8 0
4 years ago
Solve the following equation for x: 6(4x+ 1) = 3(x + 8) + 3.
salantis [7]

Answer:

x = -1/7  Or 0.143 (3 dec)

Step-by-step explanation:

6(4x + 5) = 3(x + 8) + 3  

= 24x + 30 = 3x + 24 + 3  

24x + 30 = 3x + 27  

21x + 30 = 27

21x = -3  

21x/21 = -3/21  

x = -1/7

Or 0.143 (3 dec)

3 0
3 years ago
Read 2 more answers
Given: AD = BC and AD || BC<br><br><br> Prove: ABCD is a parallelogram.
maksim [4K]

Answer:

ABCD is a parallelogram

Step-by-step explanation:

Given: AD ≅ BC and AD ∥ BC Prove: ABCD is a

parallelogram. Statements Reasons 1. AD ≅ BC; AD ∥ BC

1. given 2. ∠CAD and ∠ACB are alternate interior ∠s 2.

definition of alternate interior angles 3. ∠CAD ≅ ∠ACB 3.

alternate interior angles are congruent 4. AC ≅ AC 4.

reflexive property 5. △CAD ≅ △ACB 5. SAS congruency

theorem 6. AB ≅ CD 6. ? 7. ABCD is a parallelogram 7.

5 0
3 years ago
Read 2 more answers
PLEASE HELP!!!
Nana76 [90]

Answer:

a) (-1,0) and (3,0)

b) x=1

c) (1, -4)

Step-by-step explanation:

As you can see in the graph below, the x intercepts of this graph are at (-1,0) and (3,0), the axis of symmetry is x=1, and the vertex is at (1,-4). Hope this helps!

3 0
3 years ago
(4x+ 1) - 3i = 2+ (3y + 5)i
Vesna [10]

(4x+1)-3i= 2 +(3y+5)i

3 0
3 years ago
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