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alexandr402 [8]
2 years ago
9

Find the value of x: (6x + 7) ° 65° (y + 90°

Mathematics
1 answer:
Salsk061 [2.6K]2 years ago
7 0

Step-by-step explanation:

65 + (y + 9) = 180 ---------- Sum of angles on a

straight line

y + 65 + 9 = 180

y + 74 = 180

y = 180 - 74 = 106

6x + 7 = y + 9 ----------- Alternate angles

But y = 106,

6x + 7 = 106 + 9

6x = 115 - 7

x = 108/6 = 18

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Step-by-step explanation:

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2 years ago
At a store Mary please $34 for 2 pounds of apples 1 pound of berries and 4 pounds of chairs Tom pays $35 for 3 pounds of apples
MrRa [10]

Answer:

34 = 2A + 1B + 4C

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Adds them together

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Subtracts the top equation from the bottom:

49-35 = 5a-3a + 3b-2b + 2c-2c

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BETA:   14 = 2a + b

Solves the 2x2 system by substitution:

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Substitutes into equation ALPHA:

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a=3

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Simplify the expression<br> ab – 2ac + cb
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Step-by-step explanation:

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