2 years ago

Solve the system: 10x-9y=8 21y+15x=0.5

Mathematics

1 answer:

artcher [175]2 years ago

3 0

Answer:

x = 1/2 y = -1/3

Step-by-step explanation:

Split it into 2 equations:

10x-9y=8

and

21y+15x=0.5

10x - 9y = 8

Step 1: Divide both sides by 10:

x = (8+9y)/(10)

Substitute x = (8+9y)/(10) into 21y+15x=0.5 :

21y + (3(8+9))/(2) = 0.5

Solve for y

y= -1/3

Substitute y= -1/3 into x = (8+9y)/(10)

x = 1/2

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C is 3/5. D is 1. B is underlined

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Ester's choir wants to learn a new song for the school concert in 7 weeks. The song has 3,016 lines. The choir learns an equal n

Ghella [55]

Answer:

the answer you will get is 61.5

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First you calcuate the number of days in the learning process there will be which there will be 49 days since 7 days x 7 weeks = 49 days. Then, you divide 3,016 and 49 to get 61.5510204 and then you round that up to get 61.5 or is you want a whole number with no decimals 62

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What are the solution(s) to the quadratic equation 50 – X2 = 0?

romanna [79]

Answer:

Step-by-step explanation:

50 - x² = 0

50 = x²

x² = 50

x = √50

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