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3 years ago

Solve the equation. Then check your solution.

Mathematics

2 answers:

ElenaW [278]3 years ago

7 0

Step-by-step explanation:

4/5+x=3/7

x=3/7-4/5

x=15-28/35

x= -13/35 option D

const2013 [10]3 years ago

3 0

Answer:

(d) -13/35

Step-by-step explanation:

$\cfrac{4}{5} + x = \cfrac{3}{7} \\ \\ \\ x = \cfrac{3}{7} - \cfrac{4}{5}\\ \\ \\ x = \cfrac{3 \times 5}{7 \times 5} - \cfrac{4 \times 7}{5 \times 7} \\ \\ \\ x = \cfrac{15}{35} - \cfrac{28}{35} \\ \\ \\ x = \cfrac{-13}{35} \\ \\ \\ x = -\cfrac{13}{35}$

Answer : (d) -13/35

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Answer:

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Step-by-step explanation:

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3 years ago

Solve 5x+4y=-30<br> 3x-9y=-18<br> Solve using the elimination method

jenyasd209 [6]

Answer:

(x, y) = (-6, 0)

Step-by-step explanation:

The y-coefficients have opposite signs, so we can eliminate y-terms by multiplying both equations by a positive number and adding the results.

9 times the first equation plus 4 times the second gives ...

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3 years ago

How many real number solutoins does the equation have? -8x^2 + 8x - 2 = 0

Yanka [14]

Answer:

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Step-by-step explanation:

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Answer:

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Evgesh-ka [11]

Answer:

Step-by-step explanation:

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