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Goryan [66]
3 years ago
11

Noah solved three math problems. The first problem took him 1 minute. The second

Mathematics
1 answer:
Mrrafil [7]3 years ago
3 0

Answer:

255 seconds

Step-by-step explanation:

60 seconds x 1.30 = 78.78 seconds

78.78 seconds  x 1.5 = 117 seconds

117+78+60= 255 seconds

hope this helps ^D^

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Explain how you can approximate a cube root when the cube is not a perfect cube.
jenyasd209 [6]

Answer:

See below.

Step-by-step explanation:

It would take a long time to explain . There is a good method called Newton's method which involves graphs of the type

y = x^3 - n and applying calculus to produce cycles of approximation  until you'll get close to the required cubic root.

You'll find it on online videos.

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3 years ago
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The directions on a sewing pattern say to cut an extra 12% of fabric to account for error. Chole needs 0.8 yard of fabric to mak
Andrew [12]
No she didnt. She needs 12% more of .8 yards.

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3 years ago
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-5.4×(-1.8)=?<br>A. -9.72<br>B. 9.72<br>C.-3<br>D.3
Fiesta28 [93]
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4 years ago
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Multiply.Express your answer in standard form.(3 points)(x² -4x + 3)(-3x²+ 7x –1)
bija089 [108]

Answer:

-3x^{4} + 19x^{3} - 38x^{2} + 25x - 3

Step-by-step explanation:

1) distribute x² into (-3x² + 7x - 1) to get: -3x^{4} + 7x³ - x²

2) distribute -4x into (-3x² + 7x - 1) to get: 12x³ - 28x + 4x

3) distribute 3 into (-3x² + 7x - 1) to get: -9x² + 21x - 3

4) combine all the answers together into one equation:

-3x^{4} + 7x³ - x² + 12x³ - 28x² + 4x - 9x² + 21x - 3

5) combine like terms:

7x³ + 12x³ = 19x³

-x² + -28x² + -9x² = -38x²

4x + 21x = 25x

6) combine answers together into one equation:

-3x^{4} + 19x³ - 38x² + 25x - 3

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3 years ago
GIVING BRAINLIEST
Arte-miy333 [17]

Answer:

i dont know

Step-by-step explanation:

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