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RoseWind [281]
2 years ago
11

The first one is done and the options for number four are:

Mathematics
1 answer:
ELEN [110]2 years ago
4 0

Answer:

Step-by-step explanation:

Part A

w² + 6w + c = 130 + c

w² + 2(3w) + c = 130 + c

To make left side of the equation a perfect square we will replace c by (3)².

w² + 2(3w) + 3² = 130 + c

[By formula → a² + 2ab + b² = (a + b)²]

w² + 2(3w) + 9 = 130 + 9

Therefore, c = 9 will be the answer.

Part B

From part A,

(w + 3)² = 139

Option (2) and Option (6) are the correct options.

Part C

w + 3 = √139

w = 11.79 - 3

w = 8.79

w ≈ 8.8 inches

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Answer:

45 mph

Step-by-step explanation:

Given: Distance travelled= 330 miles

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3 years ago
−5(x+3)+8x=3<br><br> ILL GIVE YOU BRAINIEST
a_sh-v [17]

Answer:

x = 6

Step-by-step explanation:

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-5(x + 3) + 8x = 3

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