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Otrada [13]
3 years ago
7

Evaluate this expression if x = -4 and y = -1. --x^2 + 3xy^2

Mathematics
1 answer:
VladimirAG [237]3 years ago
6 0
+4^2+3(-4-1)^2
16+3(5)^2
16+15^2
16+30
=46
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Christopher earns $5. 80 an hour and time-and-a-half for all hours over 40 hours. How much did he earn the week he worked 44. 5
Monica [59]

Answer: $271.15

Step-by-step explanation:

$5.80 × 40 = 232

Time and a half = $8.70  

Overtime is 4.5 hours

$8.70 × 4.5 = 39.15

$232 + 39.15 = 271.15

6 0
2 years ago
Work out the volume of this sphere.<br> Give your answer to 1 decimal place.<br> 4.7 cm
Dmitry [639]

Answer:

434.9 cm³

Step-by-step explanation:

Volume of a sphere: 4/3πr³

Substitute the information to find the volume.

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7 0
3 years ago
#7-9 please help with an explanation,, will mark brainliest
Mandarinka [93]

Answers:

<h2>7. 12</h2><h2>8. -√18</h2><h2>9. √220</h2>

Step-by-step explanation:

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#7

\sqrt{88} = 9.38083151965

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#8

-\sqrt{18} = -4.24264068712

-4.2 > -6

#9

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3 years ago
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lana66690 [7]
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4 0
3 years ago
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