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Gre4nikov [31]
3 years ago
5

Which of the following equations have no solutions? Choose all answers that apply:

Mathematics
2 answers:
Harlamova29_29 [7]3 years ago
7 0

A

- 40x + 40 = 20x + 20 \\  - 60x =  - 20 \\ x =  \frac{1}{3}

This equation has a solution

B

20x + 40 = 40x + 20 \\  - 20x =  - 20 \\ x = 1

This equation has a solution

C

- 20x + 40 =  - 20x + 20 \\ 0x =  - 20

This equation has no solution

D

40x + 40 = 40x + 20 \\ 0x =  - 20

This equation has no solution

Answer: C, D

mojhsa [17]3 years ago
3 0
Answer choice a and b are incorrect . C and D are correct
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While traveling to Europe, Phelan exchanged 250 US dollars for euros. He spent 150 euros on his trip. After returning
yulyashka [42]

Answer:

44.70 US dollars

Step-by-step explanation:

euro left=(250/1.3687)-150=32.66(rounded to nearest cents

US dollars=32.66x1.3687

                =44.70US dollars

5 0
3 years ago
The Question Is In The Picture (Please Help Me Quick)
Elanso [62]

Answer:

y=mx+b

10=15x+B

b is whatever the number is you got to add or multiply to get the next number

Step-by-step explanation:

5 0
2 years ago
Please help!!! Will mark brainliest!
Ksenya-84 [330]

Answer:

4, 11

Step-by-step explanation:

Q# 13 :

Let the first number be 'x'

the 2nd number would be ' x + 7'

x + x + 7 = 15

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x= 8/2

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2nd number: x + 7

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5 0
3 years ago
Solve x2 – 12x + 59 = 0 for x.
mr_godi [17]
59 is a tough bird to deal with; its only factors are 1 and 59.

Thus, forget about factoring.  Instead, use the quadratic formula, or solve the equation by completing the square.

Please note:  x2 is ambiguous.  Please write x^2 to indicate "the square of 2."

Here you have 1x^2 - 12x + 59 = 0, for which a=1, b=-12 and c=59.

Use the quadratic formula:  x=[-b plus or minus sqrt(b^2-4ac)] / (2a)

to find the two roots.  Notice that the "discriminant" b^2 - 4ac will be negative, meaning that your two roots will be "complex."
3 0
3 years ago
2- La longueur d'un rectangle mesure 2 cm de plus que le triple de sa largeur. Si le périmètre de ce rectangle est supérieur à 1
Art [367]

Answer:

5 < L < 18,5

5 < L < 18,52 < W < 5,5

Step-by-step explanation:

longeur = length = L

largeur = width = W

L = 3W +2

12 < 2L+2W < 48

———————————————

12 < 2*(3W+2)+2W < 48

12 < 6W+4 +2W < 48

12 < 8W+4 < 48

8 < 8W < 44

2 < W < 5,5

———————————————

12 < 2L+2W < 48

L = 3W +2

<em>L</em><em> </em><em>-</em><em> </em><em>2</em><em> </em><em>=</em><em> </em><em>3</em><em>W</em>

<em>L</em><em>/</em><em>3</em><em> </em><em>-2</em><em>/</em><em>3</em><em> </em><em>=</em><em> </em><em>W</em>

12 < 2L +2*(L/3 -2/3) < 48

12 < 2L + ⅔L -4/3 < 48

12 < 2⅔L -4/3 < 48

13⅓ < 2⅔L < 49⅓

5 < L < 18,5

hope it helps.

brainly exists in French too. brainly.fr or switch country in app

3 0
3 years ago
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